6533b836fe1ef96bd12a07f1
RESEARCH PRODUCT
Force-Time Characteristics and Running Velocity of Male Sprinters during the Acceleration Phase of Sprinting
Antti A. Merosubject
PhysicsPhase (waves)Physical Therapy Sports Therapy and RehabilitationGeometryGeneral MedicineAccelerationCenter of gravitySprintNephrologyMoment (physics)Orthopedics and Sports MedicineForce platformBiomechanics of sprint runningResultant forcedescription
Abstract In an effort to investigate the force-time characteristics during the acceleration phase of the sprint start, eight male sprinters were used as subjects. Runs up to 3 m were analyzed from film, and force-time parameters were measured on a force platform. In a starting stance the reaction time of the group was .118 ± .016 s and the force production lasted .342 ± .022 s. The maximal resultant force at the moment of maximal horizontal force was 19.3 ± 2.2 N x kg1, and the direction of the force was 32 ± 7°. In the very last instant before leaving the blocks the velocity of the center of gravity was 3.46 ± .32 m x s−1. In the first contact after leaving the blocks there was a braking phase (.022 ± .005 s in duration) during which the average horizontal force was −153 ± 67 N. The braking phase was observed despite the body center of gravity being horizontally ahead by .13 ± . 05 m with respect to the first contact point. The percentage of deceleration in running velocity during that phase was 4.8 ± 2....
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1988-06-01 | Research Quarterly for Exercise and Sport |