Biomechanics of Jumping

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Biomechanics of Jumping
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Biomechanics of Jumping
Applications
Sports that Focus on Jumping Sports that Depend
on Jumping Maximimizing Vertical
Height Maximimizing Horizontal Displacement Landin
g
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Biomechanics of Jumping
The Body as a Projectile
Center of Gravity Follows a Parabola Acted Upon
by Gravity Body May Move Around the C of G Rarely
Influenced by air resistance
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Biomechanics of Jumping
Factors Determining Path of C of G
Velocity at Take-off Angle of Trajectory at
Take-off Height of C of G at Take-off Aerodynamic
factors
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Biomechanics of Jumping
Maximizing Vertical Height
Velocity at Take-off .maximize, but Angle of
Trajectory at Take-off..90 degrees, but Height
of C of G at Take-offas high as possible, but
Key Velocity compromised to optimize take-of
angle
Key Adjust body position in flight to optimize
relationship to C of G
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Biomechanics of Jumping
Maximizing Horizontal Displacement
Velocity at Take-off .maximize, but Angle of
Trajectory at Take-off..90 degrees, but Height
of C of G at Take-offas high as possible, but
Key Velocity optimized and take-of angle
compromised
Key Role of the free arm and free leg
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Biomechanics of Jumping
Aerodynamics
The Extent of the Influence is a Function of the
Relative Velocity Examples Long Jumper
and Headwind Drag Ski Jump and Headwind -
Lift
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Biomechanics of Jumping
Landing
Basic Objective Change the Bodys Momentum to
Zero
Impulse Force x Time As Time Increase Force
Decreases
Factors Joint Motions Landing Surface
Compliance Other