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Elite sprinters ATTACK the track to generate HIGH GRF at contact. If you’ve ever seen a 100m race in person, you know it sounds like an earthquake.
High level sprinters are able to put more force into the ground (especially during the first half of ground contact) via a few key components:
💥Fast thigh angular velocities & foot tangential velocities
This a byproduct of having higher thigh amplitudes (greater ROM) during flight, which gives them more room to “whip from the hip.”
Fast thigh angular velocities also create high foot tangential velocities, aka how fast the foot is moving at touchdown (both its vertical and horizontal components). This is KEY for achieving faster sprint speeds.
💪High lower limb stiffness
This is crucial to have the eccentric capacity to resist excessive deformation during ground contact, which will increase GCT. Elite sprinters have extremely high levels of stiffness, which is product of their neuromuscular RFD and tendon stiffness.
Ultimately, this is how they generate higher GRF during the first half of ground contact. This allows them generate the necessary impulse (to satisfy flight time needs for stride length) FASTER, which decreases GCT!
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