“3D videoanalysis of the high jump: the technique of different decathletes”<br />Gaspar Epro<br />
High jump<br />What is the goal of the high jump?<br />To get over a higher bar than the other athletes...<br />But how?<b...
Run!<br />Jump!<br />Arch!<br />06.10.2011<br />1st European Decathlon Conference<br />3<br />
Easy. Isn’t it?<br />A bit of practise and you’ve got it!<br />06.10.2011<br />1st European Decathlon Conference<br />4<br />
If it were so easy, every single athlete, who is <br />training for some event, would be like...<br />06.10.2011<br />1st ...
06.10.2011<br />1st European Decathlon Conference<br />6<br />High jump, like every other sport, needs a lot of hard work ...
06.10.2011<br />1st European Decathlon Conference<br />7<br />Decathletes have 10 different events, 10 challenges in 2 day...
3D biomechanical videoanalysis<br />Detect important details in athlete’s technique + compare different athletes<br />Grap...
06.10.2011<br />1st European Decathlon Conference<br />9<br />
What is required?<br />min. 2 highspeed cameras (atleast 50 Hz)<br />min. 1 calibration object<br />a 3D programme to calc...
My Master-study<br />Goal<br />Register various biomechanical <br />parameters important to high jump<br />06.10.2011<br /...
HJ phases<br />Run-up phase<br />Take-off phase<br />Flight phase <br />	(Bar clearence)<br />Landing<br />06.10.2011<br /...
HJ result<br />Depends highly on the maximal height of the jumper’s COG (center of gravity) in the bar clearence phase (hm...
Vvert and hmax<br />06.10.2011<br />1st European Decathlon Conference<br />14<br />hmax<br />Vvert<br />
Vhor and Vvert<br />06.10.2011<br />1st European Decathlon Conference<br />15<br />Vvert TO<br />VhorTD<br />
Vhor and hmax<br />06.10.2011<br />1st European Decathlon Conference<br />16<br />hmax<br />Vhor TD<br />
Run-up<br />Usually 7-10 strides<br />Straight part (first strides)<br />Curve part (last 3-5 strides)<br />Goal: <br />	T...
Run-up keypoints<br />Accelerate  (fastest in the end on run-up) aka SLOW to FAST <br />Lean inwards to the curve<br />Tak...
Lateral lean in the curve run-up<br />06.10.2011<br />1st European Decathlon Conference<br />19<br />Optimal lean<br />Upp...
Lateral lean<br />Depends on the radius of the curve and the horizontal velocity of the run-up<br />The larger the curve r...
Take-off preparation<br />Penultimate stride slightly longer and last stride a bit shorter (LONG-SHORT). Variations among ...
Take-off preparation<br />Get over the penultimate ground contact as fast as possible!<br />Push yourself from the penulti...
06.10.2011<br />1st European Decathlon Conference<br />23<br />Drozdov 2.14 (o)<br />Eaton 2.02 (o)<br />Šebrle 1.99 (o)<b...
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Take-off<br />Goal:<br />	To produce enough vertical velocity and rotations to be able to clear the bar!<br />06.10.2011<b...
06.10.2011<br />1st European Decathlon Conference<br />30<br />TO<br />Vresultant<br />Vvert_active (Muscle Contr.)<br />V...
Take-off<br />Start of the take-off (TD)<br />Amortization<br />End of the take-off (TO)<br />06.10.2011<br />1st European...
TD angle<br />06.10.2011<br />1st European Decathlon Conference<br />32<br />hmax<br />αTD<br />
TD angle and the path of vert. acceleration<br />06.10.2011<br />1st European Decathlon Conference<br />33<br />Path of th...
Path of vert. acceleration and hmax<br />06.10.2011<br />1st European Decathlon Conference<br />34<br />hmax<br />αTD<br /...
Free limbs action<br />06.10.2011<br />1st European Decathlon Conference<br />35<br />More active free limb use might <br ...
The trajectory of the COG cannot be changed after leaving the ground!<br />The COG trajectory is determined with the rotat...
06.10.2011<br />1st European Decathlon Conference<br />37<br />LRTO<br />BFTO<br />LRTD<br />BFTD<br />Frontal moment of i...
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Take-off distance<br />06.10.2011<br />1st European Decathlon Conference<br />40<br />TOD<br />
TOD and Vhor at the TD<br />The higher the horizontal velocity and the bar, the further is athlete’s take-off point<br />D...
Flight phase<br />Goal:<br />	To get over the bar as efficiently as possible!<br />Athlete cannot change the flight of the...
Flight<br />06.10.2011<br />1st European Decathlon Conference<br />43<br />Straight take-off leg<br />Half Sit-Kick-Flop<b...
Bar clearence<br />06.10.2011<br />1st European Decathlon Conference<br />44<br />
Bar clearence<br />06.10.2011<br />1st European Decathlon Conference<br />45<br />γBAR<br />hmax height from the bar (h3)<...
06.10.2011<br />1st European Decathlon Conference<br />46<br />
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Conclusion<br />Aim for faster optimal horizontal velocities in the end of run-up (transform more hor. velocity to vertica...
Recommended literature<br />http://www.indiana.edu/~sportbm/High-Jump-Report-29-2006-Women.pdf<br />http://www.indiana.edu...
06.10.2011<br />1st European Decathlon Conference<br />55<br />Thank you for listening!<br />Questions?<br />
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3d videoanalysis of the high jump: the techniques of different decathletes

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My presentation at the 1st European Decathlon Conference (05.-06.10.2011)

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3d videoanalysis of the high jump: the techniques of different decathletes

  1. 1. “3D videoanalysis of the high jump: the technique of different decathletes”<br />Gaspar Epro<br />
  2. 2. High jump<br />What is the goal of the high jump?<br />To get over a higher bar than the other athletes...<br />But how?<br />06.10.2011<br />1st European Decathlon Conference<br />2<br />
  3. 3. Run!<br />Jump!<br />Arch!<br />06.10.2011<br />1st European Decathlon Conference<br />3<br />
  4. 4. Easy. Isn’t it?<br />A bit of practise and you’ve got it!<br />06.10.2011<br />1st European Decathlon Conference<br />4<br />
  5. 5. If it were so easy, every single athlete, who is <br />training for some event, would be like...<br />06.10.2011<br />1st European Decathlon Conference<br />5<br />
  6. 6. 06.10.2011<br />1st European Decathlon Conference<br />6<br />High jump, like every other sport, needs a lot of hard work and talent, but even if you work really hard, you might not get it right...<br />You need get your technique right, precise and constant!<br />
  7. 7. 06.10.2011<br />1st European Decathlon Conference<br />7<br />Decathletes have 10 different events, 10 challenges in 2 days, they need to focus on getting their max in every single event!<br />Every attempt counts, every attempt is worth points!<br />They can’t let the fatigue win and destroy their technique!<br />
  8. 8. 3D biomechanical videoanalysis<br />Detect important details in athlete’s technique + compare different athletes<br />Graphical 3D model<br />Numerical data <br />(CM velocities & positions,<br /> step lengths, take-off distance etc.)<br />06.10.2011<br />1st European Decathlon Conference<br />8<br />
  9. 9. 06.10.2011<br />1st European Decathlon Conference<br />9<br />
  10. 10. What is required?<br />min. 2 highspeed cameras (atleast 50 Hz)<br />min. 1 calibration object<br />a 3D programme to calculate the coordinates of the athlete (+ a statistic program to calculate the data)<br />06.10.2011<br />1st European Decathlon Conference<br />10<br />
  11. 11. My Master-study<br />Goal<br />Register various biomechanical <br />parameters important to high jump<br />06.10.2011<br />1st European Decathlon Conference<br />11<br />
  12. 12. HJ phases<br />Run-up phase<br />Take-off phase<br />Flight phase <br /> (Bar clearence)<br />Landing<br />06.10.2011<br />1st European Decathlon Conference<br />12<br />
  13. 13. HJ result<br />Depends highly on the maximal height of the jumper’s COG (center of gravity) in the bar clearence phase (hmax) <br />06.10.2011<br />1st European Decathlon Conference<br />13<br />
  14. 14. Vvert and hmax<br />06.10.2011<br />1st European Decathlon Conference<br />14<br />hmax<br />Vvert<br />
  15. 15. Vhor and Vvert<br />06.10.2011<br />1st European Decathlon Conference<br />15<br />Vvert TO<br />VhorTD<br />
  16. 16. Vhor and hmax<br />06.10.2011<br />1st European Decathlon Conference<br />16<br />hmax<br />Vhor TD<br />
  17. 17. Run-up<br />Usually 7-10 strides<br />Straight part (first strides)<br />Curve part (last 3-5 strides)<br />Goal: <br /> To get your body into an optimal position for the start of the take-off phase! <br />06.10.2011<br />1st European Decathlon Conference<br />17<br />Path of the run-up<br />Path of the COG<br />
  18. 18. Run-up keypoints<br />Accelerate (fastest in the end on run-up) aka SLOW to FAST <br />Lean inwards to the curve<br />Take-off preparation (penultimate and last stride)<br />06.10.2011<br />1st European Decathlon Conference<br />18<br />
  19. 19. Lateral lean in the curve run-up<br />06.10.2011<br />1st European Decathlon Conference<br />19<br />Optimal lean<br />Upper body out<br />Upper body in<br />
  20. 20. Lateral lean<br />Depends on the radius of the curve and the horizontal velocity of the run-up<br />The larger the curve radius, the smaller the lateral lean<br />The faster the run-up horizontal velocity, the greater the lean<br />06.10.2011<br />1st European Decathlon Conference<br />20<br />
  21. 21. Take-off preparation<br />Penultimate stride slightly longer and last stride a bit shorter (LONG-SHORT). Variations among athletes.<br />COG should be the lowest at the penultimate ground contact!<br />The hardest part is to accelerate or atleast maintain the velocity produced with the previous strides!<br />06.10.2011<br />1st European Decathlon Conference<br />21<br />
  22. 22. Take-off preparation<br />Get over the penultimate ground contact as fast as possible!<br />Push yourself from the penultimate to the take-off!<br />Push the hips forward to get to the optimal position for take-off!<br />Take-off leg should lead the upper body at the start of take-off phase (TD)!<br />06.10.2011<br />1st European Decathlon Conference<br />22<br />
  23. 23. 06.10.2011<br />1st European Decathlon Conference<br />23<br />Drozdov 2.14 (o)<br />Eaton 2.02 (o)<br />Šebrle 1.99 (o)<br />Van der Plaetesen 2.17 (x)<br />
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  29. 29. Take-off<br />Goal:<br /> To produce enough vertical velocity and rotations to be able to clear the bar!<br />06.10.2011<br />1st European Decathlon Conference<br />29<br />
  30. 30. 06.10.2011<br />1st European Decathlon Conference<br />30<br />TO<br />Vresultant<br />Vvert_active (Muscle Contr.)<br />Vvert_passive<br />TD<br />Vhor<br />
  31. 31. Take-off<br />Start of the take-off (TD)<br />Amortization<br />End of the take-off (TO)<br />06.10.2011<br />1st European Decathlon Conference<br />31<br />Touch-down<br />Amortization<br />Take-off<br />
  32. 32. TD angle<br />06.10.2011<br />1st European Decathlon Conference<br />32<br />hmax<br />αTD<br />
  33. 33. TD angle and the path of vert. acceleration<br />06.10.2011<br />1st European Decathlon Conference<br />33<br />Path of the vert. acceleration<br />αTD<br />
  34. 34. Path of vert. acceleration and hmax<br />06.10.2011<br />1st European Decathlon Conference<br />34<br />hmax<br />αTD<br />Path of the vert. acceleration<br />
  35. 35. Free limbs action<br />06.10.2011<br />1st European Decathlon Conference<br />35<br />More active free limb use might <br />increase the height of the COG <br />in the end of takeoff phase up to 10%<br />
  36. 36. The trajectory of the COG cannot be changed after leaving the ground!<br />The COG trajectory is determined with the rotations and velocities produced in the take-off and run-up!<br />06.10.2011<br />1st European Decathlon Conference<br />36<br />
  37. 37. 06.10.2011<br />1st European Decathlon Conference<br />37<br />LRTO<br />BFTO<br />LRTD<br />BFTD<br />Frontal moment of inertia<br />Lateral moment of inertia<br />Lateral rotation<br />Frontal rotation<br />Vertical rotation<br />Resultant rotation<br />
  38. 38. 06.10.2011<br />1st European Decathlon Conference<br />38<br />
  39. 39. 06.10.2011<br />1st European Decathlon Conference<br />39<br />
  40. 40. Take-off distance<br />06.10.2011<br />1st European Decathlon Conference<br />40<br />TOD<br />
  41. 41. TOD and Vhor at the TD<br />The higher the horizontal velocity and the bar, the further is athlete’s take-off point<br />Depends on the amount of created inertia<br />06.10.2011<br />1st European Decathlon Conference<br />41<br />
  42. 42. Flight phase<br />Goal:<br /> To get over the bar as efficiently as possible!<br />Athlete cannot change the flight of the COG, but it’s possible to move one part of the body, if other parts are moved to another direction!<br /> (ACTION-REACTION principle) <br />06.10.2011<br />1st European Decathlon Conference<br />42<br />ACTION<br />(lower the head <br />and upper body)<br />REACTION<br />(hips raise)<br />
  43. 43. Flight<br />06.10.2011<br />1st European Decathlon Conference<br />43<br />Straight take-off leg<br />Half Sit-Kick-Flop<br />Sit-Kick-Flop<br />
  44. 44. Bar clearence<br />06.10.2011<br />1st European Decathlon Conference<br />44<br />
  45. 45. Bar clearence<br />06.10.2011<br />1st European Decathlon Conference<br />45<br />γBAR<br />hmax height from the bar (h3)<br />
  46. 46. 06.10.2011<br />1st European Decathlon Conference<br />46<br />
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  53. 53. Conclusion<br />Aim for faster optimal horizontal velocities in the end of run-up (transform more hor. velocity to vertical with no decrease in the muscle contraction mechanisms in the take-off) to produce higher vertical velocity<br />Penultimate stride (fast over + push)<br />Increase the path of vertical acceleration without losing the velocity (reasonable lateral and backward lean)<br />Generate appropriate amount of rotations in the take-off phase to clear the bar<br />06.10.2011<br />1st European Decathlon Conference<br />53<br />
  54. 54. Recommended literature<br />http://www.indiana.edu/~sportbm/High-Jump-Report-29-2006-Women.pdf<br />http://www.indiana.edu/~sportbm/High-Jump-Report-32-2007-Men.pdf<br />Killing, Wolfgang. Trainings- und Bewegungslehre des Hochsprungs (ed. 1, 2004; ed. 2, 2009)<br />www.jumpscoach.eu<br />06.10.2011<br />1st European Decathlon Conference<br />54<br />
  55. 55. 06.10.2011<br />1st European Decathlon Conference<br />55<br />Thank you for listening!<br />Questions?<br />

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