LTAD 6 Adolescence and Windows

8/14/2019 LTAD 6 Adolescence and Windows

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Long-Term Athlete

DevelopmentThe Timings and Sequence of Changes DuringAdolescence and the Windows of Trainability


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Aims


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Aims

Indicators of maturity status


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Aims

Indicators of maturity status Adolescent growth spurt


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Aims


Sexual maturity


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Aims


Sexual maturity Sequence of sexual and somatic maturity


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Aims



Peak Weight Velocity


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Aims




Growth spurts in performance


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Aims





Performance relative to menarche


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Aims





Performance relative to menarche

The windows of trainability


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Indicators of maturity

status


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status

Skeletal


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status

Skeletal

Sexual


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status

Skeletal

Sexual

Somatic


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status

Skeletal

Sexual

Somatic

Dental


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Adolescent growth spurt


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Peak Height Velocity: velocity of growth when inreaches its maximum

Most common used indicator of somaticmaturity


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Differential timing


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Differential timing

Differential tempo


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Differential timing

Differential tempo

Individual differences


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Differential timing

Differential tempo

Individual differences


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Parameters of PHV


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Parameters of PHV

Age at take off (TO)


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Parameters of PHV

Age at take off (TO) The range among the mean ages at TO is is 2 yearsand 1 year at PHV in girls and boys


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Parameters of PHV


TO is between 8.2 & 10.3 years in girls and10.0-12.1 years in boys


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Parameters of PHV



PHV is between 11.3 & 12.2 years in girls and 13.3& 14.4 years in boys (European)


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Parameters of PHV




TO & PHV occur earlier in girls than in boys, thesex difference is approximately 2 years


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Parameters of PHV




TO & PHV occur earlier in girls than in boys, thesex difference is approximately 2 years

Limitations to data


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Sexual maturity


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Sexual maturity

The assessment of sexual maturity is basedupon the development of secondary

characteristics


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Sexual maturity


characteristics

Differing assessment- Photos, clinical, self-assessment


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Sexual maturity


characteristics

Differing assessment- Photos, clinical, self-assessment

Girls - 9.5 years to 11.5 years


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Menarche


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Menarche

Most commonly reported secondary sexcharacteristic for girls


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S f l d


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Sequence of sexual and

somatic maturit

S f l d


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somatic maturit Budding of breasts in girls (B2) & initial enlargement ofgenitals in boys (G2) are normally the first signs of sexual

maturity although in some children pubic hairs coincides or

even precedes

S f l d


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even precedes

PHV tends to occur earlier in the sequence of puberty forgirls than boys

S f l d


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even precedes


Menarche is a late event in the pubertal sequence, about 1year or more after PHV and when most girls are in B4 &PH4

S f l d


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even precedes


Menarche is a late event in the pubertal sequence, about 1year or more after PHV and when most girls are in B4 &PH4

Variations in the sequence are partly genuine and partly

methodological


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Peak Weight Velocity- At PHV for boys &

approximately between 0.3 & 1.0 year afterPHV in girls

PWV is between 4.6 & 8.6 in girls and 10.1and 12.2 in boys (very approx!)


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Any Questions?

G h i


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Growth spurts in

performance

G h i


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Growth spurts in

performance Age-related trends in strength, motorperformance, and anaerobic power suggest

acceleration in growth during adolescence in

males but not consistently in females

G h i


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Growth spurts in




Most boys show a clear adolescent growth spurtin performance

G h i


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Growth spurts in




Most boys show a clear adolescent growth spurtin performance

Corresponding longitudinal data in girls that spansadolescence is limited

Strength


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Strength

Strength


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Strength Boys reach peak gains in

strength on averageabout 1.2 years after

PHV and 0.8 years after

PWV (after in 77%,

coincide in 11%, andbefore in 12%)

Strength


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PWV (after in 77%,


Girls reach peak strengthdevelopment near PHVand 0.6 years before

PWV (precedes PHV in

40%, coincides in 11%

and follows PHV in 49%

Strength


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PWV (after in 77%,


Girls reach peak strengthdevelopment near PHVand 0.6 years before

PWV (precedes PHV in

40%, coincides in 11%

and follows PHV in 49%


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Motor performance


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Motor performance

During adolescence boy tend todemonstrate an awkwardness in motor

performance.


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Motor performance


performance.

This is not seen as much in girls


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Motor performance


performance.

This is not seen as much in girls

Strength and power outputs still show largeincrease


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A bi


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Aerobic power

O2 max increases inthe years preceding

PHV and continues to

increase through

adolescence

A bi


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Aerobic power

O2 max increases inthe years preceding

PHV and continues to

increase through

adolescence

Relative O2 max (ml/

kg/min) decreases inthe year or so

proceeding PHV and

continues to decline for

several years after PHV

P f l ti t


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Performance relative to

menarche

Performance relati e to


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menarche Menarche is a late event in the sequence ofadolescent changes



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There is no difference in motorperformance



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AbsoluteO2 max increases from 2 yearsbefore to 2 years beyond menarche

whereas relativeO2 max decreases



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AbsoluteO2 max increases from 2 yearsbefore to 2 years beyond menarche

whereas relativeO2 max decreases


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Any Questions?

LTAD 6 Adolescence and Windows

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Transcript of LTAD 6 Adolescence and Windows