The acceleration phase describes the part of a swim start where speed rapidly increases. Swimmers build momentum through powerful kicks and arm strokes. The body moves from stillness into strong forward motion.
Arms pull aggressively while legs drive forcefully underwater. Proper timing between limbs maximizes early race velocity. Swimmers keep their heads aligned to reduce drag. Strong core engagement stabilizes the torso during movement.
Each stroke aims to push more water backward. Faster water displacement creates greater forward speed. During a 100-meter freestyle race, a swimmer explodes forward after the dive. That burst of speed defines the acceleration phase. Effective acceleration shortens the time needed to reach top speed. Coaches train short sprints to improve this explosive movement.
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