TRACKING THROUGH ULTRA WIDE BAND TECH - … Reche... · TRACKING THROUGH ULTRA WIDE BAND TECH Xavi...
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TRACKING THROUGH ULTRA WIDE BAND TECH
Xavi Reche Royo, MscArea of sport performance FCB
(Tracking monitoring)
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TRACKING MONITORING HISTORY IN FCB
Beginnings
• 1st Soccer team justwith few devices
Soccer teams
• Added until U17
Indoortracking
• All 1st teams begins totrack their players
Uniquesystem
• Indoor teamwork
Actually: Tracking monitoring TEAMWORK
All the club with the same company, but not the same location system
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TEAMWORK
Outdoor sports
1st Soccer team (M)
1st Soccer team (F)
2nd Soccer team (M)
U18 Soccer team (M)
U17 Soccer team (M)
U16 Soccer team (M)
Youth Soccer academy (M)
Indoor sports
1st Basketball team (M)
1st Handball team (M)
1st Futsal team (M)
1st Roller hockey team (M)
2nd Basketball team (M)
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OUTDOOR VS INDOOR
- 1944: Isidor Isaac Rabi Nobel laureate in physics.
Invented the magnetic resonance, lead to the creation of the
Atomic clock, the precise time pieces that form the basis of
satellite navigation
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OUTDOOR VS INDOOR
- The precise measurement of atomic clock -> calculation of
the length of time it takes a radio signal to travel from
satellite GPS receiver on earth
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OUTDOOR VS INDOOR
What’s the difference?
LPS vs GPS/GNSSLocal Positioning System Global Positioning System
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There ISN’T ONLY Positioning…
DATA POSITIONING
DERIVED
- Position (x,y)
- Distance
- Velocity
- Acceleration
DATA INERTIAL SENSORS
DERIVED
- Accelerations
- Angular movement & speed
- Elevation
- ANT+ devices connected
- …
Don’t need positioning!!!
OUTDOOR vs INDOOR
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VALIDITY & RELIABILITY
Not valid
Not reliable
Low validity
Low reliabilityNot validity
Reliable
Valid
Reliable
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VALIDITY & RELIABILITY
(Akenhead, et al., 2013)
“The validity and inter-unit reliability of 10 Hz GPS for the
measurement of instantaneous velocity has been shown to
be inversely related to acceleration”
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VALIDITY & RELIABILITY
(Coutts & Duffield, 2008)
“Poor level of intra-model reliability for very high intensity
running”
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VALIDITY & RELIABILITY
(Akenhead, et al., 2013)
“To eliminate inter-unit variation, GPS devices should not be
used interchangeably”
Player A Player B
X
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VALIDITY & RELIABILITY
(Scott, Scott & Kelly, 2016)
- 1 to 5 Hz GPS have limitations during short distance.
- 10 Hz GPS seems to be the better frequency with no
difference with 15 Hz.
- But, few studies with 15 Hz that can explain that
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VALIDITY & RELIABILITY
Ultra Wide Band acuracy
(Unpublished data)
“This index indicates the variation, expressed in centimeters, between the
measurement of the device and real measurement.
The precision index is: -1,441±2,609cm. ”
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FCB VIEW
RE
AL
LO
AD
For decades, the monitoring of movements developed by
athletes during training or competition have interested sport
scientists.
(Carling et al. 2008; Castellano & Casamichana 2014; Lieberman et al. 2002)
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External load & Internal load
“Set of biological and
psychological demands”
“Caused by the activity
and competition”
(Badillo, 1995)
What the player does What the player feelR
EA
L
LO
AD
FCB VIEW
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(Scanlan, et al., 2014)
“not assume a linear dose-response between the external training load (detected by
accelerometry) and the player’s internal training load during basketball-specific activities”
FCB VIEW
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(Unpublished data)
0,67 0,93 1,07 1,17
4,4
5,0
1,8
2,2
0,0
1,0
2,0
3,0
4,0
5,0
6,0
0,00
0,20
0,40
0,60
0,80
1,00
1,20
1,40
5c5 1/2p 5c5 Scrimmage 1c0 1p 1c0 zig-zag
Relation between 5c5 & 1c1
Player Load/min High Int Actions/min
FCB VIEW
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Volume
Player load
Total distance
Intensity
Distance at highvelocity
High accelerations & decelerations
High jumpings, landings &
impacts
Number of highintensity actions
Calculatedload
HML Distance
High speedrunning
Dynamic stress load
Power metabolicaverage
Density
Ratio Work:Resttime
All variables realted to minute
Interesting
Ratio High:Lowaccelerations
Ratio Distance at High:Low velocity
MAIN TRACKING VARIABLES (for us)
FCB VIEW
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Examples: Z-Score & Smallest Worthwhile Change
-3
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High Intensity Actions Z-Score & SWC
FCB VIEW
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0,0
100,0
200,0
300,0
400,0
500,0
600,0
700,0
800,0
0-1 km/h 1-6 km/h 6-12 km/h 12-18 km/h 18-21 km/h 21-24 km/h 24-30 km/h
Number of Accelerations / Velocity zone
+6 m/s^2
5-6 m/s^2
4-5 m/s^2
3-4 m/s^2
2-3 m/s^2
1-2 m/s^2
0-1 m/s^2
0%
20%
40%
60%
80%
100%
0-1 km/h 1-6 km/h 6-12 km/h 12-18 km/h 18-21 km/h 21-24 km/h 24-30 km/h
% of Accelerations / Velocity zone
+6 m/s^2
5-6 m/s^2
4-5 m/s^2
3-4 m/s^2
2-3 m/s^2
1-2 m/s^2
0-1 m/s^2
FCB VIEWAcceleration & Speed
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0,0
200,0
400,0
600,0
800,0
1000,0
0-1 km/h 1-6 km/h 6-12 km/h 12-18 km/h 18-21 km/h 21-24 km/h 24-30 km/h
Number of Decelerations / Velocity zones
+6 m/s^2
5-6 m/s^2
4-5 m/s^2
3-4 m/s^2
2-3 m/s^2
1-2 m/s^2
0-1 m/s^2
0%
20%
40%
60%
80%
100%
0-1 km/h 1-6 km/h 6-12 km/h 12-18 km/h 18-21 km/h 21-24 km/h 24-30 km/h
% Decelerations / Velocity zone
+6 m/s^2
5-6 m/s^2
4-5 m/s^2
3-4 m/s^2
2-3 m/s^2
1-2 m/s^2
0-1 m/s^2
FCB VIEWAcceleration & Speed
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0%
20%
40%
60%
80%
100%
0-1 km/h 1-6 km/h 6-12 km/h 12-18 km/h 18-21 km/h 21-24 km/h 24-30 km/h
% Decelerations / Velocity zone
+6 m/s^2
5-6 m/s^2
4-5 m/s^2
3-4 m/s^2
2-3 m/s^2
1-2 m/s^2
0-1 m/s^2
0%
20%
40%
60%
80%
100%
0-1 km/h 1-6 km/h 6-12 km/h 12-18 km/h 18-21 km/h 21-24 km/h 24-30 km/h
% of Accelerations / Velocity zone
+6 m/s^2
5-6 m/s^2
4-5 m/s^2
3-4 m/s^2
2-3 m/s^2
1-2 m/s^2
0-1 m/s^2
FCB VIEWAcceleration & Speed
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TAKE HOME MESSAGE
FC Barcelona is eager to increase their knowledge in tracking
systems
Be critic with the data you record, be sure that is correct data
Tracking doesn’t explain all what happens in the field