SLEEP, MOOD, AND COASTAL WALKING...SLEEP, MOOD, AND COASTAL WALKING 4 1. SUMMARY This research...
Transcript of SLEEP, MOOD, AND COASTAL WALKING...SLEEP, MOOD, AND COASTAL WALKING 4 1. SUMMARY This research...
SLEEP, MOOD, AND COASTAL WALKING
Report prepared for
The National Trust
by
Eleanor Ratcliffe
August 2015
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CONTENTS Section Page List of terms and abbreviations .......................................................... 3
1. Summary ......................................................................................... 4
2. Introduction ..................................................................................... 2.1. The psychological benefits of nature .........................................
2.2. Benefits of blue nature ..............................................................
2.3. Benefits of the seaside ..............................................................
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3. Aims ................................................................................................. 6
4. Method .............................................................................................
4.1. Research design and participants .............................................
4.2. Walking locations ......................................................................
4.3. Measures and dependent variables ..........................................
4.4. Procedure ..................................................................................
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5. Results .............................................................................................
5.1. Data screening ..........................................................................
5.2. Change in self-reported sleep quality ........................................
5.3. Change in self-reported sleep quantity ......................................
5.4. Change in self-reported mood ...................................................
5.5. What do people associate with walking? ...................................
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6. Discussion .......................................................................................
6.1. Summary of significant findings .................................................
6.2. Implications and potential explanations .....................................
6.3. Limitations of the data ...............................................................
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7. Conclusions .................................................................................... 20
8. References ...................................................................................... 21
9. Acknowledgements ........................................................................ 23
10. About the author ............................................................................ 23
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LIST OF TERMS AND ABBREVIATIONS A number of statistical terms and abbreviations are used in this report. For
clarity, they are defined here.
ANOVA Analysis of variance (tests for significant
differences between mean values)
Chi-squared test Tests likelihood that differences in frequencies
occurred by chance
Dependent variable Outcome measure (e.g. sleep quality, mood)
Independent variable Factor(s) being manipulated (e.g. walk location)
M Mean (average value)
Outlier An extreme score occurring at the very high or low
end of the distribution of scores
SD Standard deviation (spread of values from the
mean)
Significant In this report, a significance level of .05 has been
used. A statistically significant difference in values
has a less than 5% likelihood of occurring by
chance and, by extension, a 95% or higher
likelihood of occurring as a result of the
independent variable.
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1. SUMMARY
This research explored effects of walking by the British coast on change in
mood and sleep. 54 participants undertook a coastal walk, and 55 an inland
walk. Both types of walkers experienced positive changes in happiness,
calmness, sleep quality, alertness, and sleep length following their walk.
However, coastal walkers showed a significantly greater increase in sleep
length than inland walkers, and were more likely to show increases in sleep
quality and alertness. Coastal walkers also reported place memory
associations relating to family, childhood, and holidays as well as
opportunities for introspection and reflective thought, which were less
apparent amongst inland walkers. Associations with holidays and escape to a
special destination could have offered coastal walkers greater scope to sleep
longer (and, to a certain extent, better).
2. INTRODUCTION
2.1. The psychological benefits of nature The psychological benefits of exposure to natural environments are well
known, from reductions in stress to improvements in mood, cognition, and
subjective wellbeing (cf. Berto, 2014, for a review). Such benefits are found
after exposure to media of nature, such as photographs (e.g. Berman,
Jonides, & Kaplan, 2008), videos (e.g. Ulrich et al., 1991), and sound
recordings (e.g. Alvarsson, Wiens, & Nilsson, 2010), but also direct
experience such as walking in nature (e.g. Hartig, Evans, Jamner, Davis, &
Gärling, 2003). Notably, individuals seem particularly fond of the multisensory
opportunities afforded by directly experiencing, rather than merely being
exposed to, nature – for example, hearing and smelling the natural world, and
interacting with flora and fauna (Kjellgren & Buhrkall, 2010).
2.2. Benefits of blue nature
Much of the research on the psychological benefits of nature has focused on
experience of green locations, but we now know that scenes containing water
– such as rivers, lakes, and seas – are particularly related to perceptions of
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happiness, cognitive restoration, and stress recovery (White et al., 2010;
Völker & Kistemann, 2011; Wyles, Pahl, & Thompson, 2014). The sound of
water, along with other natural sounds, has also been implicated in stress
recovery (Alvarsson et al., 2010).
Ulrich (1983, p. 105) suggests that positive appraisals of water might stem
from its “biological” value as adaptive for human survival, as well as the ability
of water to add depth and a focal point to landscape. In setting out their theory
of attention restoration, Kaplan and Kaplan (1989) also comment on the ability
of certain dynamic aspects of nature, such as waterfalls, to attract attention
effortlessly and thereby facilitate cognitive recovery.
2.3. Benefits of the seaside
The presence of water is an important in positive experiences of nature, but
what of the sea specifically? For centuries, the coast – and particularly the
British coast – has been marketed as a way to “blow away the cobwebs”
(Beckerson & Walton, 2005, p. 56), and Depledge and Bird (2009) suggest
that there is an inherent desire for individuals to be the near the coast.
The body of evidence for therapeutic or beneficial effects of coastal visits has
grown in recent years. Living near the coast is related to increased health and
wellbeing (Wheeler, White, Stahl-Timmins, & Depledge, 2012; White, Alcock,
Wheeler, & Depledge, 2013), and psychological benefits of short-term
experiences such as a walk by the sea are related to happiness (Wyles et al.,
2014). Bell, Phoenix, Lovell, and Wheeler (in press) report perceptions of the
coast as calming and mentally restorative. These perceptions were related to
place attachment and memories of coastal places as well as the aesthetic
properties of the sea itself.
One understudied area of positive or restorative nature experiences is that of
sleep quality. Being by the sea is anecdotally related to health and sleep (e.g.
Mitchell, 2014, and Beckerson & Walton, 2005) but empirical evidence for this
claim is limited. However, the market prevalence of auditory sleep aids related
to seaside environments, such as CDs featuring ocean sounds, suggests links
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between such environments and conditions suitable for sleep, such as
relaxation or reduced arousal. In addition, evidence showing greater energy
expenditure on coastal visits (Elliott, White, Taylor, & Herbert, 2015),
combined with known relationships between sleep length and energy
expenditure in the form of exercise (e.g. Kubitz, Landers, Petruzzello, & Han,
1996), suggests a hypothetical link between visiting the coast and improved
sleep quality and/or quantity.
3. AIMS
The research described in this report aimed to quantitatively examine whether
outdoor walking influenced self-reported sleep quality, quantity, and mood,
and specifically to examine whether there were differences in any such
changes between inland and coastal walkers.
In addition, the research included qualitative data collection and analysis
regarding associations with walking in inland and coastal locations, in order to
study potential differences in participant experiences in these locations.
4. METHOD
4.1. Research design and participants 109 participants (38 male, 69 female) were recruited for this study via social
media, contact with walking groups, and direct approach in the field. Ages
ranged from 21 to 82 years (M age = 58 years).
Participants undertook a questionnaire-based study in which measures of
mood and sleep quality were recorded before and after a coastal or inland
walk. The study utilised a mixed design, with location (coastal, inland) as the
between-participants independent variable and phase (pre-walk, post-
walk/morning-after) as the within-participants independent variable. 54
participants walked by the coast, and 55 inland. Participants were offered a
free day pass to a National Trust property in exchange for their participation.
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No significant differences were observed between inland and coastal walkers
in terms of age, length of walk (time or distance), walks per month, or walk
difficulty, and no significant differences between men and women were found
on the dependent (outcome) variables. The average walk across conditions
was 7.24 miles long and lasted three hours and 40 minutes.
41 additional participants (13 male, 28 female, M age = 49 years) were
recruited online via social media in order to provide extra qualitative data.
These participants did not receive anything in exchange for their participation.
4.2. Walking locations Of the main sample of 109 participants, 54 walked by the coast. 25 of these
were recruited in the field at Bournemouth, Brighton, and Hove. A further 13
recruited online and 16 recruited via walking groups undertook walks at
coastal locations in Sussex, Devon, Kent, Dorset, the South West Coast Path,
and Wales. Of the 55 participants who walked inland, 22 were recruited in the
field in Winchester, Lewes, and Hampstead Heath. A further 12 recruited
online and 19 recruited via walking groups undertook walks at countryside,
nature reserve, and park locations in Kent, Sussex, Greater London, and
Yorkshire. Example photos of coastal and inland locations are provided in
Figures 1 and 2, below. Data were collected on weekends and weekdays
between June and August 2015, during a period of generally fair weather.
Figure 1. Example coastal location
(Brighton, Sussex)
Figure 2. Example inland location
(River Ouse, Lewes)
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4.3. Measures and dependent variables Participants completed a three-page questionnaire comprising pre-walk (i.e.
baseline), post-walk, and morning-after phases. They were asked to indicate:
4.3.1. Sleep quality, captured pre-walk and the morning after the
walk. Sleep quality measures comprised:
• Overall sleep quality, measured from 1 (Very poor) to 5 (Very
good)
• Alertness on waking, from 1 (Very tired) to 5 (Very alert)
• Achieving and maintaining sleep; that is:
o Difficulty falling asleep, from 0 (No) to 1 (Yes)
o Time to sleep onset, in minutes
o Waking during the night, number of times
4.3.2. Sleep quantity, captured pre-walk and the morning after the
walk, in hours and minutes.
4.3.3. Mood, captured pre- and post-walk. Happiness and calmness
were measured on two rating scales from 1 (Very unhappy/Very
active) to 5 (Very happy/Very calm).
4.3.4. Qualitative associations and background information
Participants were also asked to indicate whether they had any particular
thoughts, feelings, memories, and associations during the walk, and if so to
write them in a free text box. Finally, participants completed a brief measure
of demographics and background information at the end of the questionnaire,
including gender, age, walk location and company, walk difficulty, and walking
frequency per month.
4.4. Procedure Participants recruited in the field were approached by the researcher and,
after providing verbal informed consent to take part, completed the pre-walk
phase of the questionnaire. They were then given the questionnaire, plus a
prepaid envelope and pen, and asked to complete the post-walk and morning-
after phases in their own time and to return the questionnaire in the post.
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Participants recruited by the researcher online and via walking groups gave
verbal informed consent to participate prior to receiving a paper or online
version of the questionnaire. They completed the pre-walk, post-walk, and
morning-after phases in relation to a walk of their choosing. Paper
questionnaires were returned by participants using a prepaid envelope
addressed to a PO box, and online questionnaires were completed using
survey software.
No significant differences in dependent variables were found as a result of
method of recruitment (in the field versus online versus walking group), and
as such data from these sources were combined in the following analyses.
5. RESULTS
5.1. Data screening Four participants were missing data on at least one dependent variable, and
as such data from these participants were excluded from individual analyses
where relevant. These data were not missing in any systematic way and may
have been due to participants accidentally skipping over a question.
Subsequent screening showed three participants with outlier data points on
sleep quantity variables, so these participants were excluded from sleep
quantity analyses.
Analyses of variance (ANOVA) and, where appropriate, chi-squared tests
were used to examine whether any statistically significant differences in mean
values or frequencies on the dependent variables were due to the differences
in phase (pre-walk, post-walk) and/or location (inland, coastal).
5.2. Change in self-reported sleep quality
5.2.1. Sleep quality Across coastal and inland walkers combined, sleep quality significantly
improved the night after a walk (M = 3.83, SD = .98) in comparison to the
night before the walk (M = 3.49, SD = 1.04). This did not vary significantly
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between coastal and inland route conditions, although there was a non-
significant trend towards a greater increase amongst coastal walkers.
Given this trend, an exploratory analysis of direction of change in sleep quality
was conducted. Coastal and inland walkers were categorised as showing a
sleep quality decrease, sleep quality increase, or no change.
Significantly fewer coastal walkers showed a decrease in sleep quality than
would be expected by chance; rather, most of these walkers either increased
or showed no change in sleep quality. In contrast, the numbers of inland
walkers who either increased, decreased, or showed no change in sleep
quality were more evenly spread. This is illustrated in Figure 3, below.
Figure 3. Number of participants who decreased, increased, or showed no
change in sleep quality after a coastal or inland walk.
5.2.2. Alertness on waking Across coastal and inland walkers combined, alertness on waking significantly
increased after a walk (M = 3.36, SD = .86) in comparison to before the walk
(M = 3.12, SD = .93). This change did not vary significantly between coastal
and inland walkers, but there was a non-significant trend towards a greater
increase in alertness amongst coastal walkers. As described in section 7.1.1,
0
5
10
15
20
25
Decrease No change Increase Decrease No change Increase
Coastal Inland
Num
ber o
f par
ticip
ants
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exploratory analysis of the direction of change was conducted based on this
trend.
Significantly fewer coastal walkers showed decreases in alertness than would
be expected by chance; the majority of these walkers either showed an
increase or no change in alertness. By contrast, significantly more inland
walkers showed no change in alertness than would be expected by chance,
with fewer showing either decreases or increases as shown in Figure 4.
Figure 4. Number of participants who decreased, increased, or showed no
change in alertness after a coastal or inland walk
5.2.3. Achieving and maintaining sleep Across coastal and inland walkers combined, the average time that it took
participants to get to sleep before a walk (M = 21 mins, SD = 24 mins) was
not significantly different to the time it took after a walk (M = 19 mins, SD = 18
mins). There were no significant differences in the frequency of sleep difficulty
occurrences before a walk (when 15% of the sample reported having difficulty
getting to sleep), or after (14%). These patterns of results did not vary
between coastal and inland walkers.
Across coastal and inland walkers, the average number of night-time wakings
was significantly lower after a walk (M = 1.20, SD = 1.16) than before (M =
0
5
10
15
20
25
30
Decrease No change Increase Decrease No change Increase
Coastal Inland
Num
ber o
f par
ticip
ants
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1.58, SD = 1.53). However, this pattern of results also did not differ between
coastal and inland walkers.
5.3. Change in self-reported sleep quantity Across coastal and inland walkers combined, participants slept significantly
longer the night after a walk (M = 7 hours 25 mins, SD = 1 hour 1 min) than
they did the night before (M = 6 hours 55 mins, SD = 1 hour 17 mins); that is,
an average increase of 30 minutes.
This effect varied between inland and coastal walkers, as illustrated in Figure
5 below. Coastal walkers slept significantly longer post-walk than pre-walk,
while the increase for inland walkers was not significant. Coastal walkers slept
for 47 minutes longer after a walk, on average, versus only 12 minutes longer
for inland walkers.
Figure 5. Mean length of night-time sleep (± 1 standard deviation) pre- and
post-walk on coastal and inland routes.
5.4. Change in self-reported mood Walkers reported feeling significantly happier after a walk (M = 4.15, SD =
.57) than before (M = 3.78, SD = .70), and also significantly calmer after a
walk (M = 3.80, SD = 1.13) than before (M = 3.55, SD = 1.00). These effects
did not vary between coastal and inland walkers.
4
5
6
7
8
9
Pre-walk Post-walk Pre-walk Post-walk
Coastal Inland
Leng
th o
f sle
ep (h
ours
)
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5.5. What do people associate with walking? Qualitative data regarding thoughts, feelings, associations and memories
relating to participant walks were analysed using thematic analysis (cf.
Ratcliffe, Gatersleben, & Sowden) in order to reveal five overarching themes
or categories. These were memories, mood, reflection, a sense of escape,
and attention. Data were analysed separately for coastal and inland walkers,
and are discussed and compared below. Analysis included data collected
online from the additional 41 participants described in section 4.1.
5.5.1. Memories in the past and for the future Past memory emerged as a particularly important theme amongst walkers.
Walking both inland and by the coast triggered memories of the past, as well
as awareness of forming memories that could be “recall[ed] at times of stress”
in the future as a form of self-soothing. Frequently the recall of memories was
positive or about happy life events, although some participants described
them as mixed in emotion or poignant:
The type of memory associated with the walk varied between coastal and
inland walkers. Walking by the sea triggered memories associated with
people close to the walker, such as parents, children, or other family
members, as well as the walker in their own childhood. These memories were
often reflective and described different times and stages of life. Walking inland
generated fewer memories of walking with family or loved ones; rather, these
memories more often related to previous experiences of the walking location
or of general, non-specific memories.
“The walk is in an area where I have holidayed many times over more than
25 years so is very rich with happy associations. In particular one spot has
very strong memories of taking a photograph of my son when he was about
11 year[s] old. He's now 21 and away at University so the memories are
quite poignant; happy but tinged with a little sadness about the passing of
time.” Male aged 54, walking by the coast.
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5.5.2. Happy and calm mood Echoing quantitative findings described in section 5.2, both walking by the
coast and inland were related to qualitative perceptions of happiness and
calmness or relaxation. Emotional reactions to inland walks were almost
universally positive, while as noted in section 4.3.1, emotional responses to
the coast were sometimes bittersweet or nostalgic. Another participant
described “always looking forward to that first ‘glimpse’ of the sea”, suggesting
a tantalising or anticipatory quality about walking towards the coast. This
aligns with notions of the coast being a special destination, as discussed in
section 7.3.4.
5.5.3. Reflection Coastal and inland walkers both used their walk as an opportunity to think and
reflect. For some participants this reflection was on everyday matters such as
“daily life, recent pressures” and for others it was more profound, such as
“Thinking about [a] recent bereavement” (coastal walker) or planning for the
future: “What to do next with my life, what job? When will I move away?”
(inland walker).
Coastal and inland walkers displayed both everyday and deeper types of
reflection. However, some inland walkers also reported experiencing “too
much visual stimulation to allow mind to wander which is perfect”, suggesting
that reflection may not always be desirable (which relates to the notion of
escape discussed in section 4.3.4). Coastal walkers appeared more uniformly
“Just memories of being by the sea as a kid, and playing for hours in the
sand and the water, not needing any other entertaining.”
Female aged 53, walking by the coast
“I have a busy week coming up, I thought through each day as I was walking
which made me feel calmer and more organised.”
Female aged 43, walking by the coast
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receptive to reflective thought processes as well as attending to their
surroundings, although one coastal walker did note that “the scenery was so
beautiful, I kept in the moment.”
5.5.4. Escape Despite using the walk as an opportunity to reflect on important matters,
walking was also associated with feelings of freedom and escape for many
participants. This may offer psychological refreshment due to a sense of
‘being away’ from everyday life (cf. Kaplan & Kaplan, 1989; Kaplan, 1995).
For coastal walkers, this was encapsulated in comments from walkers who
explicitly said that they were on holiday and/or had been on holiday there in
the past, including important events such as a honeymoon, and were
therefore likely to be taking a break from daily life.
The exoticism and remoteness of coastal locations was also related to
perceptions of being away:
Inland walkers did not refer to their walks as part of a holiday but rather
commented on the sense of freedom achieved through being in the
countryside, particularly through physical exertion. The comments suggest
that the coast still retains the associations and romance of a holiday
destination, while inland walking can be seen as an accessible way to escape
from daily stresses.
“Memories of our honeymoon, 29 years ago, when we stayed just along
the coast.” Female aged 56, walking by the coast
“It is like being in a jungle and feels very isolated. You can't hear any
cars or manmade noise, you rarely meet people, you get glimpses of the
sea but it feels like you could be in any place or time.”
Female aged 44, walking by the coast
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5.5.5. Attention Both coastal and inland walkers commented on their attention to the
surroundings on their walks. They attended to the overall landscape or
seascape, as well as smaller details like animals, birds, flowers, and plants.
Views were often mentioned and described as beautiful by both coastal and
inland walkers. One coastal walker commented on other sensory experiences
such as sounds and smells:
Descriptions of attention to surroundings by inland walkers tended to be more
detailed and focused than coastal walkers; for example, many inland walkers
were engaged in wildlife spotting (e.g. “Joy and excitement at seeing some
rare flowers (burnt-tip orchid) and butterflies (marsh fritillary and adonis blue),
happiness while watching a fox”). While coastal walkers also engaged in
some of these activities, their attention appeared broader in terms of
appreciating the landscape as a whole.
This difference in specificity of attention may also be related to reflection; as
noted in section 4.3.3, inland walkers were less likely to want to focus on
internal thoughts, and indeed commented on social aspects of the walk such
as company and conversation far more than coastal walkers. Coastal walkers
may have engaged more in internal reflection, particularly in environments
where there was “not a lot else” besides the view of the sea, although some
coastal walkers did report “enjoying watching the world go by and feeling in
the moment”.
“There are wonderful smells of wild garlic and lots of birds singing and
not a lot else.” Female aged 44, walking by the coast
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6. DISCUSSION
6.1. Summary of significant findings This study investigated the effects of outdoor walking on mood, sleep quality,
and sleep quantity, and in particular explored whether differences in these
effects might occur between coastal and inland walkers.
Mood (happiness and calmness) and self-reported sleep quality (as measured
through sleep quality, morning alertness, and night-time wakings) significantly
improved after a walk, but this occurred regardless of whether the walk took
place coastally or inland. However, on inspection of how many participants
reported improvements in sleep quality and morning alertness, coastal
walkers showed a significant advantage. They were more likely to either
improve or maintain their sleep quality and alertness than they were to report
a decrease, whereas the direction of change in inland walkers was more
evenly split (in the case of sleep quality) or tended towards maintenance (in
the case of alertness). Self-reported sleep length improved significantly after a
walk, and this difference was also significantly greater for coastal walkers than
it was for inland walkers. In plain terms, coastal walkers, but not inland
walkers, were more likely to show an improvement in sleep quality and
alertness, and they showed a much larger increase in how long they slept
following a walk.
Examination of qualitative data provided by participants indicated that
memories of coastal walks were more closely associated with family and
childhood self than inland walks, supporting findings from Bell et al. (in press).
The coast was also seen as a greater opportunity for introspection and
reflective thought, linking to concepts of a psychologically restorative or
beneficial environment (Kaplan & Kaplan, 1989). Coastal walks were
associated with holidays, previous trips away, and heightened emotions in the
form of nostalgia and anticipation, while inland walks were more closely
associated with attention to flora and fauna.
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Together, these findings provide evidence for promoting walks along British
coasts. Like inland walks, they can promote positive changes in mood and
sleep, but seaside walks are more strongly related to longer (and, to a lesser
extent, better) sleep. Place memory and place attachment are particularly
related to coastal walks, with emphasis on family and children, which speaks
strongly to the history of British coastlines as a place for family holidays.
6.2. Implications and potential explanations The findings above indicate a small, yet statistically significant, difference
between coastal and inland walkers in terms of how they experience sleep
after a walk, and a clear difference in terms of how long they sleep. Walking
by the coast is related to sleeping longer, and increases the chances of
sleeping better, relative to inland walking. This may be related to feelings of
escape, discussed below, but existing research regarding energy expenditure
is also relevant.
6.2.1. A sense of escape The qualitative findings relating to coastal and inland walks reflect the
quantitative findings that both groups experienced the walks as relaxing and
pleasant. However, coastal walkers were more likely to associate the walk
and/or the walking location with a holiday experience. Given relationships
between restorative environments and a sense of escape or ‘being away’ from
daily life (Kaplan & Kaplan, 1989), it may be that coastal walkers felt more
able to relax and let go in these environments due to their associations with
holidays, with potential effects on sleep length. Notably, quantitative
measures of change in mood did not show significant differences between
coastal and inland environments, but qualitative data showed a greater
tendency for coastal walkers to reflect, closely related to psychological
restoration and, ultimately, relaxation (Kaplan & Kaplan, 1989).
6.2.2. Energy expenditure Previous research has associated coastal visits with greater energy
expenditure than visits to other types of natural environments, which may be
due to their longer duration (Elliott et al., 2015). However, as noted in section
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3.1, the coastal and inland groups in this study did not differ significantly in
terms of length of walk or how hard participants found them. This may
account for the finding of only small differences in self-reported sleep quality
and alertness between coastal and inland walkers.
It is also notable that coastal visitors beyond the present research engage in
other activities besides walking such as swimming, beach sports, and play
(Elliott et al., 2015; Bell et al., in press) which may impact on how tired they
feel and how well they sleep. This study concentrated only on coastal walkers,
but future studies might wish to study what it is that people do at the beach
besides walking and how this relates to sleep.
6.3. Limitations of the data
6.3.1. Quasi-experimental design The data in this study were collected in a quasi-experimental manner by
contact with participants who were already planning a walk in a coastal or
inland location. As such, participants may have chosen to walk in locations
that best suited their needs at that particular time; indeed, as shown through
the qualitative data, several coastal walkers had personal connections with
their walking locations. Random assignment of participants to walk in either a
coastal or an inland location would serve to counteract this issue, and might
reveal differences in walking experiences otherwise obscured by personal
choice over walking location.
6.3.2. Recall of sleep quality The study also asked participants to recall their previous night’s sleep at the
start of the walk; that is, after some time had elapsed since waking. As such,
participants may not have been able to answer questions about sleep quantity
or quality as accurately as they did the following morning. Issuing participants
with a longer-term sleep diary would enable the collection of data immediately
upon waking on the day of the walk, as well as the day after.
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6.3.3. Need for restoration or recovery It is notable that, on average, participants in this study did not report
especially low mood or sleep quality prior to taking a walk. In this sense the
scope for differences in improvement in either mood or sleep between coastal
and inland locations may have been limited, by virtue of the fact that
participants generally felt positive and well-rested prior to the walk anyway.
Checks were conducted to see whether differences in improvement between
coastal and inland locations were apparent amongst participants who
displayed low mood or sleep quality prior to the walk, and no significant
differences were found, but sample sizes in this instance were relatively low
(approximately 25 participants) and as such may have limited the opportunity
to find significant differences1. Future research might wish to concentrate
specifically on the restorative effects of coastal versus inland walking amongst
participants who are stressed, in a negative mood, and/or displaying sleep
difficulties.
7. CONCLUSIONS
This study collected data from 109 participants walking in either a coastal or
an inland region of the United Kingdom. Coastal walkers were significantly
more likely to show an improvement, no matter how big or small, in sleep
quality or alertness. In addition, coastal walkers showed a significantly larger
improvement in sleep duration than inland walkers, increasing their night’s
sleep by an average of 47 minutes. Qualitative data indicate that the coast is
a place that prompts memories of family and childhood, as well as being
perceived as a holiday destination regarded with heightened emotion and
anticipation. This attachment to place may generate feelings of being away
that could lead to restorative or psychological beneficial experiences,
including longer sleep.
1 For brevity the results of these post-hoc analyses have not been reported here, but are available from the author on request.
SLEEP, MOOD, AND COASTAL WALKING
21
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9. ACKNOWLEDGEMENTS The author would like to thank the participants who took part in this research
and the individuals who helped to advertise it online and by word of mouth –
in particular, Roger Bennett, Sue Ellenby, Christine de Groot, and David
Powell.
10. ABOUT THE AUTHOR
Dr. Eleanor Ratcliffe is an environmental psychologist, specialising in the
effects of natural and built environments on mood and attention. In 2015 she
completed her PhD at the University of Surrey on the psychological benefits of
listening to birdsong, and is conducting postdoctoral research on memories of
favourite places at the University of Tampere, Finland.
Eleanor conducted the research described in this report in an independent
capacity on behalf of the client, the National Trust. For further information,
please contact her at [email protected] or [email protected].