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Test Biomechanics of Acceleration
Agenda
1st QUESTION: What is the primary biomechanical objective in the acceleration phase?
Reach maximum speed in the shortest time from rest
Maintain constant speed
Reduce vertical oscillation to zero throughout the race
Conserve energy for the end
QUESTION 2: In the acceleration phase, which direction of the forces applied to the ground determines the efficiency?
Mainly vertical as in running lunges
Extreme horizontal
Minimal tangential
Centripetal to the axis
3rd QUESTION: Why does the sprinter adopt a trunk inclination of approximately 45 degrees at the start?
To look more aerodynamic
To lengthen flight time
To align the center of mass and project yourself forward with the reaction of the ground
To avoid using arms
4th QUESTION: What describes the "Triple Extension" in acceleration?
Coordinated hip, knee and ankle flexion
Full and simultaneous extension of hip, knee and ankle of the pushing leg
Sequential extension of knee and ankle only
Trunk rotation and braking
QUESTION 5: What alignment should be observed when the foot leaves the floor or the block?
A straight line connecting shoulder hip knee and ankle
A slight pronounced lumbar curve
Knee forward and hips flexed
Head elevated and ankle in maximum dorsiflexion
QUESTION 6: What is the effect of breaking the line of force during acceleration?
Increase forward propulsion
Dissipates force and prevents it from being transmitted effectively to the forward stroke
Improve arm balance
Reduce ground contact time
7th QUESTION: How should the foot contact pattern be during acceleration according to the piston action?
Land in front of the center of gravity
Seek contact far in front to lengthen the stride
Contact below the hip or slightly behind
Heel first with knee extended
8TH QUESTION: What is the role of the arms during acceleration?
Reduce leg movement
Keeping the head flexed downward
Generate additional vertical forces
Acting as aggressive counterweights with broad movement from the shoulder
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