We aimed to examine how swimmers modify their velocities as a function of swim pace using spatiatemporal and kinetic data. In a group of 12 competitive swimmers, swim speed (v), stroke rate (SR), stroke length (SL), Index of coordination (ldC) and propulsive phase duration (PrP) were determined using four underwater cameras. Force impulse per stroke (I+/stroke) and average force (Faverage) were determined using eight force sensors attached to both sides of the dominant hand. Results show that to swim faster, participants increased SR, ldC, PrP and Faverage (p<0.05). Movement coordination patterns were reorganised while hand forces were scaled, enabling swimmers to keep ,./stroke constant despite propulsive time decreasing across stroke.
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