Ce diaporama a bien été signalé.
Nous utilisons votre profil LinkedIn et vos données d’activité pour vous proposer des publicités personnalisées et pertinentes. Vous pouvez changer vos préférences de publicités à tout moment.
MECHANICS OF SPEEDA SCIENCE-BASED APPROACH TO PRACTICAL IMPROVEMENTMike Young, PhDHPC - Athletic LabCary, NC USAVancouver ...
•   Insight from today’s best   •   General concepts•   Fundamental physics         •   Acceleration mechanics•   Performa...
People Running Ridiculously Fast
9.7x
6 99 .
9.6919.26
10.67
Lewis (1988)   Bolt (2008)  0-10m       1.89           1.85 10-20m       1.07           1.02 20-30m       0.94           0...
Lewis (1988)   Bolt (2008)  0-10m       1.89           1.85 10-20m       1.07           1.02 20-30m       0.94           0...
Lewis (1988)   Bolt (2008)  0-10m       1.89           1.85 10-20m       1.07           1.02 20-30m       0.94           0...
Top Sprinters TODAYaccelerate Faster   & Longer &DeceleratE Less
POINTS TO REMEMBER•   Today’s top sprinters:    •   Accelerate faster and longer    •   Maintain top speed longer    •   D...
Are you spending time worrying about  things that aren’t based in reality?
INERTIAIt turns out Sir Isaac was right
F=MA
WHAT LIMITSPERFORMANCE?
Research Review
•Gravity....u•We wor k      gh•Excess ma    to overc                       ome gra            ss hur ts         v  ity    ...
= more    speed•More    force             le across speeds         me is co  mparab• Air ti   imb spe    ed....meh•L      ...
lates with speed     ide length corre•Str                e is imp or tant• Horizo  ntal forc
•Better sprinte r s are front-sidedominant  Better sprinter s have shor ter•contact times   Full extension  neither needed...
•CL more effective at a                    •CL produces higher re    pplying force                    •CL velocity compone...
ACCELERATION CHARACTERISTICS•   Velocity @10m: ~8.2 m/s•   Ground Contact Time: ~0.17 sec•   Height of foot @ 1st step: 12...
MAXIMAL VELOCITY                  CHARACTERISTICS                                  *Stride Frequency: ~5 Hz*Maximal Veloci...
KINETICPARAMETERS• Groundreaction forces approaching 3x bodyweight• Muscle       forces in excess of 7x bodyweight
GENERALCONCEPTS OF SPRINTING       by   Hugo Faasta
N   at     ur       eN ur   tu     re
Loren Seagrave
Sprinting fast is anunnatural activity             Dr. Ralph Mann
MECHANICS OF SPRINTING• Sprinting          well is a combination of nature and nurture• There      are reflexive and innate...
FRONT SIDE MECHANICS• Refers to the motions of the leg that occur IN FRONT of the body
BACK SIDE MECHANICS• Refersto the motions of the swing leg that occur BEHIND the body
Stride Length x Frequency = Speed?
B UT .. ..
CorrelationD O E S N OT i m p l yCausation
Old: To  increase     d, increa se stridespee                 quency     New: Stri length and fre                       de...
STRIDE LENGTH &              FREQUENCY• Stridelength and frequency are linked...they are a consequence and not a cause of ...
STRIDE LENGTH                                    &                                FREQUENCYThe benefit of greater force app...
SPRINT MATH• Stride   frequency is comprised of two components:  1. Ground contact time  2. Flight time• The   best sprint...
POINTS TO REMEMBER• Forces       applied to the ground are the most important determinant of running speed  • It   increas...
EXAMINING FORCE• Force   is a vector quantity • Magnitude • Direction
FORCE DEVELOPMENT & SPRINTING• Toincrease running speed an athlete must increase force to the ground in the appropriate di...
POSTURE
The first most        important     aspect of speed       is posture.Tom Tellez
POSTURE• Movements   of the limbs originate from the core of the body• Properstabilization and alignment of the core ensur...
POSTURE• Postural    Stabilization• Postural Alignment  • Relaxation  • Freedom      of movement  • Elastic   energy produ...
PELVIC MOTION• The  pelvis should rotate in all three planes
Postural Test!
Posture during Acceleration                         NoNo
POSTURE DURING MAX VELOCITY
POSTURE DURING SPEED ENDURANCE
FOOT CONTACT...what it tells us
Acceleration Mechanics
Run fast For long
Run fast .
Run (accelerate)
Early Acceleration•Big split of arms & legs•Ipsilateral synchrony of leg & arm angles•Pushing through long axis of trunk•H...
EFFICIENT BLOCK CLEARANCE
TOE DRAG,OR NOT TOE DRAG,THAT IS THEQUESTION...
Late Acceleration                    •Continuation of previous points                    •Progression of body angles      ...
•Progression to upright •Shoulder - hip stackTRANSITION
Variable        Early        Late  Contacts       Longer       ShorterSegment Usage     Bigger      Smaller Body Angle    ...
When does 60 = 20?
EXTENDING ACCELERATION• Staying       in pushing mechanics permits a neuromuscular and metabolic shift that allows for les...
city SprintingMaximal Velo
tim  izingOp  e ch an ics?M
Max V Sprinting 101   Big Force       + Right Direction       + Minimal Time     Faster
GOALS OF SPRINTING• Minimize   braking forces• Increase   propulsive forces
MINIMIZE BRAKING FORCES• Decreases   horizontal velocity• Caused by excessive step length and positive foot and leg speed ...
EFFECTIVE GROUNDCONTACT POSITION
IncreasingPropulsive Forces
Horizontal vs Vertical Propulsive Forces....  and why you don’t have to pick a side
VERTICAL PROPULSIVE FORCE• Increasedvertical propulsive force produces:  • Greater   displacement  • More effective ground...
Am  plit      ude          ?
Boing?
VERTICAL DISPLACEMENT• The path of COM will follow a sinusoidal curve when viewed in the sagittal plane • COM   reaches ap...
To go faster, you needmore force. The more force you apply, thehigher you will rise off     the ground.                 Ch...
INCREASE LEG STIFFNESS•   Refers of the ability of the leg to act as like a spring•   Momentum is developed during acceler...
VS
Better sprinters mayappear to bounce
Better sprinters may   In reality, flight times are similar andappear to bounce         ground contact times are shorter
SPRINTMechanicsChecklist
PosturePosture  Trunk Erect  Head Level  Hips Tall
Ground ContactUpright postureMinimize horizontaldistance between footand hipsLegs togetherHeel high
Stance PhaseUpright postureTall hipsVertical forcesSwing leg active
Stance PhaseUpright postureStepping over knee
Stance PhaseUpright postureHigh kneeSwing leg unfolds
Toe OffProjection of non-support hipHigh kneeNeutral / dorsiflexedankleMinimal backsidemechanics
FlightAppropriate verticaldisplacementPreparation forground contact  Downward  acceleration of  thigh  Neutral /  dorsiflex...
Max VelocityTechnical PointsFix postureEmphasize vertical pushes  “Push up”High hips  “Run tall”Step over and down
CLOSING POINTS•   Performance breakthroughs can be made by accelerating faster & longer•   Maintaining top speed means les...
MIKE@ATHLETICLAB.COMTWITTER.COM/MIKEYOUNGATHLETICLAB.COMELITETRACK.COMHPCSPORT.COM                        THANKS
Mechanics of Speed
Mechanics of Speed
Mechanics of Speed
Mechanics of Speed
Mechanics of Speed
Mechanics of Speed
Mechanics of Speed
Mechanics of Speed
Prochain SlideShare
Chargement dans…5
×

Mechanics of Speed

75 332 vues

Publié le

This is the slidedeck from Dr. Mike Young's presentation from the 2013 Speed Summit.

Publié dans : Sports
  • DOWNLOAD FULL BOOKS, INTO AVAILABLE FORMAT ......................................................................................................................... ......................................................................................................................... 1.DOWNLOAD FULL. PDF EBOOK here { https://tinyurl.com/y8nn3gmc } ......................................................................................................................... 1.DOWNLOAD FULL. EPUB Ebook here { https://tinyurl.com/y8nn3gmc } ......................................................................................................................... 1.DOWNLOAD FULL. doc Ebook here { https://tinyurl.com/y8nn3gmc } ......................................................................................................................... 1.DOWNLOAD FULL. PDF EBOOK here { https://tinyurl.com/y8nn3gmc } ......................................................................................................................... 1.DOWNLOAD FULL. EPUB Ebook here { https://tinyurl.com/y8nn3gmc } ......................................................................................................................... 1.DOWNLOAD FULL. doc Ebook here { https://tinyurl.com/y8nn3gmc } ......................................................................................................................... ......................................................................................................................... ......................................................................................................................... .............. Browse by Genre Available eBooks ......................................................................................................................... Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, Cookbooks, Crime, Ebooks, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult,
       Répondre 
    Voulez-vous vraiment ?  Oui  Non
    Votre message apparaîtra ici
  • DOWNLOAD FULL. BOOKS INTO AVAILABLE FORMAT ......................................................................................................................... ......................................................................................................................... 1.DOWNLOAD FULL. PDF EBOOK here { https://tinyurl.com/y8nn3gmc } ......................................................................................................................... 1.DOWNLOAD FULL. EPUB Ebook here { https://tinyurl.com/y8nn3gmc } ......................................................................................................................... 1.DOWNLOAD FULL. doc Ebook here { https://tinyurl.com/y8nn3gmc } ......................................................................................................................... 1.DOWNLOAD FULL. PDF EBOOK here { https://tinyurl.com/y8nn3gmc } ......................................................................................................................... 1.DOWNLOAD FULL. EPUB Ebook here { https://tinyurl.com/y8nn3gmc } ......................................................................................................................... 1.DOWNLOAD FULL. doc Ebook here { https://tinyurl.com/y8nn3gmc } ......................................................................................................................... ......................................................................................................................... ......................................................................................................................... .............. Browse by Genre Available eBooks ......................................................................................................................... Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, Cookbooks, Crime, Ebooks, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult,
       Répondre 
    Voulez-vous vraiment ?  Oui  Non
    Votre message apparaîtra ici
  • Hey guys! Who wants to chat with me? More photos with me here 👉 http://www.bit.ly/katekoxx
       Répondre 
    Voulez-vous vraiment ?  Oui  Non
    Votre message apparaîtra ici
  • Njce! Thanks for sharing.
       Répondre 
    Voulez-vous vraiment ?  Oui  Non
    Votre message apparaîtra ici
  • Good day. It’s my pleasure meeting you, and that you enjoying your day? Can you allowed me to introduce my self to you. My name is Kine Gaye . I will like to get acquainted with you. please I'll be glad if you write to me or send your email address direct at my private email address (kinegaye00@hotmail.com) because i have some important thing i will like to discuss with you privately. Hope to hear from you soon. Kine.
       Répondre 
    Voulez-vous vraiment ?  Oui  Non
    Votre message apparaîtra ici

Mechanics of Speed

  1. MECHANICS OF SPEEDA SCIENCE-BASED APPROACH TO PRACTICAL IMPROVEMENTMike Young, PhDHPC - Athletic LabCary, NC USAVancouver Whitecaps FCVancouver, BC Canada
  2. • Insight from today’s best • General concepts• Fundamental physics • Acceleration mechanics• Performance limiters • Top end speed mechanics
  3. People Running Ridiculously Fast
  4. 9.7x
  5. 6 99 .
  6. 9.6919.26
  7. 10.67
  8. Lewis (1988) Bolt (2008) 0-10m 1.89 1.85 10-20m 1.07 1.02 20-30m 0.94 0.91 30-40m 0.89 0.87 40-50m 0.86 0.85 50-60m 0.83 0.82 60-70m 0.85 0.82 70-80m 0.85 0.82 80-90m 0.86 0.8390-100m 0.88 0.90 Time 9.92 9.69
  9. Lewis (1988) Bolt (2008) 0-10m 1.89 1.85 10-20m 1.07 1.02 20-30m 0.94 0.91 30-40m 0.89 0.87 40-50m 0.86 0.85 50-60m 0.83 0.82 60-70m 0.85 0.82 70-80m 0.85 0.82 80-90m 0.86 0.8390-100m 0.88 0.90 Time 9.92 9.69
  10. Lewis (1988) Bolt (2008) 0-10m 1.89 1.85 10-20m 1.07 1.02 20-30m 0.94 0.91 30-40m 0.89 0.87 40-50m 0.86 0.85 50-60m 0.83 0.82 60-70m 0.85 0.82 70-80m 0.85 0.82 80-90m 0.86 0.8390-100m 0.88 0.90 Time 9.92 9.69
  11. Top Sprinters TODAYaccelerate Faster & Longer &DeceleratE Less
  12. POINTS TO REMEMBER• Today’s top sprinters: • Accelerate faster and longer • Maintain top speed longer • Decelerate less• Improving mechanics will improve performance
  13. Are you spending time worrying about things that aren’t based in reality?
  14. INERTIAIt turns out Sir Isaac was right
  15. F=MA
  16. WHAT LIMITSPERFORMANCE?
  17. Research Review
  18. •Gravity....u•We wor k gh•Excess ma to overc ome gra ss hur ts v ity perform ance
  19. = more speed•More force le across speeds me is co mparab• Air ti imb spe ed....meh•L is KING •Ver ti cal force
  20. lates with speed ide length corre•Str e is imp or tant• Horizo ntal forc
  21. •Better sprinte r s are front-sidedominant Better sprinter s have shor ter•contact times Full extension neither needed • n or beneficial Ideal touchdown characterized • by swin g knee even with suppor t knee
  22. •CL more effective at a •CL produces higher re pplying force •CL velocity componen lative net horizon tal force •CL has shor ter contac t of F-V is higher •CL has higher stride fr t times equency eMaitre Insert research on French LCL = Christophe
  23. ACCELERATION CHARACTERISTICS• Velocity @10m: ~8.2 m/s• Ground Contact Time: ~0.17 sec• Height of foot @ 1st step: 12-30cm• Stride Frequency: 3.6-4 Hz• Stride Lengths: ~1.5m first step
  24. MAXIMAL VELOCITY CHARACTERISTICS *Stride Frequency: ~5 Hz*Maximal Velocity: ~12.8 m/s *Stride Velocity: ~300 deg / sec *Stride Lengths: 2.25-2.7m*Ground Contact Time: ~0.08 sec*40-45 steps for sub 9.80 100m
  25. KINETICPARAMETERS• Groundreaction forces approaching 3x bodyweight• Muscle forces in excess of 7x bodyweight
  26. GENERALCONCEPTS OF SPRINTING by Hugo Faasta
  27. N at ur eN ur tu re
  28. Loren Seagrave
  29. Sprinting fast is anunnatural activity Dr. Ralph Mann
  30. MECHANICS OF SPRINTING• Sprinting well is a combination of nature and nurture• There are reflexive and innate components as well as trainable components
  31. FRONT SIDE MECHANICS• Refers to the motions of the leg that occur IN FRONT of the body
  32. BACK SIDE MECHANICS• Refersto the motions of the swing leg that occur BEHIND the body
  33. Stride Length x Frequency = Speed?
  34. B UT .. ..
  35. CorrelationD O E S N OT i m p l yCausation
  36. Old: To increase d, increa se stridespee quency New: Stri length and fre de length & frequency are inter- related an d an effec rather th t an a caus e
  37. STRIDE LENGTH & FREQUENCY• Stridelength and frequency are linked...they are a consequence and not a cause of speed• Speedof movement of limbs is of little importance
  38. STRIDE LENGTH & FREQUENCYThe benefit of greater force application is two-fold:• Increased stride length • Increased stride frequency
  39. SPRINT MATH• Stride frequency is comprised of two components: 1. Ground contact time 2. Flight time• The best sprinters spend less time on the ground ◦ Greater frequency
  40. POINTS TO REMEMBER• Forces applied to the ground are the most important determinant of running speed • It increases stride length and frequency• Better sprinters apply more force in a shorter period of time
  41. EXAMINING FORCE• Force is a vector quantity • Magnitude • Direction
  42. FORCE DEVELOPMENT & SPRINTING• Toincrease running speed an athlete must increase force to the ground in the appropriate direction and do so over increasingly shorter periods of time • Minimize horizontal braking forces* • Increase propulsive forces
  43. POSTURE
  44. The first most important aspect of speed is posture.Tom Tellez
  45. POSTURE• Movements of the limbs originate from the core of the body• Properstabilization and alignment of the core ensures appropriate movements of the limbs
  46. POSTURE• Postural Stabilization• Postural Alignment • Relaxation • Freedom of movement • Elastic energy production
  47. PELVIC MOTION• The pelvis should rotate in all three planes
  48. Postural Test!
  49. Posture during Acceleration NoNo
  50. POSTURE DURING MAX VELOCITY
  51. POSTURE DURING SPEED ENDURANCE
  52. FOOT CONTACT...what it tells us
  53. Acceleration Mechanics
  54. Run fast For long
  55. Run fast .
  56. Run (accelerate)
  57. Early Acceleration•Big split of arms & legs•Ipsilateral synchrony of leg & arm angles•Pushing through long axis of trunk•Hip, knee, ankle extension•Low heel recovery•Neutral posture
  58. EFFICIENT BLOCK CLEARANCE
  59. TOE DRAG,OR NOT TOE DRAG,THAT IS THEQUESTION...
  60. Late Acceleration •Continuation of previous points •Progression of body angles •Stepping over calve ➟ knee
  61. •Progression to upright •Shoulder - hip stackTRANSITION
  62. Variable Early Late Contacts Longer ShorterSegment Usage Bigger Smaller Body Angle Forward UprightHeel Recovery Low Higher Leg Action Piston-like Cyclic GRADUAL progression is key
  63. When does 60 = 20?
  64. EXTENDING ACCELERATION• Staying in pushing mechanics permits a neuromuscular and metabolic shift that allows for less fatigue later in a race• Athletes should display: • Lower heel recovery • Gradual but slow progression of body angles • Piston-like action of the legs
  65. city SprintingMaximal Velo
  66. tim izingOp e ch an ics?M
  67. Max V Sprinting 101 Big Force + Right Direction + Minimal Time Faster
  68. GOALS OF SPRINTING• Minimize braking forces• Increase propulsive forces
  69. MINIMIZE BRAKING FORCES• Decreases horizontal velocity• Caused by excessive step length and positive foot and leg speed at ground contact
  70. EFFECTIVE GROUNDCONTACT POSITION
  71. IncreasingPropulsive Forces
  72. Horizontal vs Vertical Propulsive Forces.... and why you don’t have to pick a side
  73. VERTICAL PROPULSIVE FORCE• Increasedvertical propulsive force produces: • Greater displacement • More effective ground contact position • Better maintenance of momentum
  74. Am plit ude ?
  75. Boing?
  76. VERTICAL DISPLACEMENT• The path of COM will follow a sinusoidal curve when viewed in the sagittal plane • COM reaches apex in flight • COM low point during support
  77. To go faster, you needmore force. The more force you apply, thehigher you will rise off the ground. Charlie Francis
  78. INCREASE LEG STIFFNESS• Refers of the ability of the leg to act as like a spring• Momentum is developed during acceleration• Body will move at same rate unless acted on by unbalanced forces• Two external forces will cause deceleration• Leg stiffness increases vertical impulse, shortens ground contact and increases elastic return
  79. VS
  80. Better sprinters mayappear to bounce
  81. Better sprinters may In reality, flight times are similar andappear to bounce ground contact times are shorter
  82. SPRINTMechanicsChecklist
  83. PosturePosture Trunk Erect Head Level Hips Tall
  84. Ground ContactUpright postureMinimize horizontaldistance between footand hipsLegs togetherHeel high
  85. Stance PhaseUpright postureTall hipsVertical forcesSwing leg active
  86. Stance PhaseUpright postureStepping over knee
  87. Stance PhaseUpright postureHigh kneeSwing leg unfolds
  88. Toe OffProjection of non-support hipHigh kneeNeutral / dorsiflexedankleMinimal backsidemechanics
  89. FlightAppropriate verticaldisplacementPreparation forground contact Downward acceleration of thigh Neutral / dorsiflexed ankle
  90. Max VelocityTechnical PointsFix postureEmphasize vertical pushes “Push up”High hips “Run tall”Step over and down
  91. CLOSING POINTS• Performance breakthroughs can be made by accelerating faster & longer• Maintaining top speed means less speed endurance• Enhancement of mechanics will improve performance• Posture is key to performance
  92. MIKE@ATHLETICLAB.COMTWITTER.COM/MIKEYOUNGATHLETICLAB.COMELITETRACK.COMHPCSPORT.COM THANKS

×