The aim of this study is to assess the technical evolutions under constrained swimming i.e at constant velocity with a fixed stroke rate value. Ten trained swimmers performed a maximal 400-m front crawl test (V400), and a set of time to exhaustion (TTE) at 95, 100, and 110% of V400 at an individual stroke rate value (corresponding to the average value of freely choosen stroke rate adopted in previous set of same TTE). Durations of TTE, relative durations of arm stroke phases and arm coordination were analysed. Durations of TTE were 333±54s, 177±58s, and 47±10s for TTE at 95, 100, and 110% of V400 respectively. For each TTE, all variables were steady, suggesting a stabilisation of the stroke technique. According to previous resutls, stroke rate can be seen as a useful tool for controlling the arm technique during paced exercise.
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