50 m freestyle in 21, 22 and 23 s: What differentiates the speed curve of world-class and elite male swimmers?

We examined the association between 50 m freestyle performance (50FS) and average speed (AS), peak (PS), minimum (MS) intracyclic variation (ISV) compared curves from swimmers with different levels using functional analysis of variance (FANOVA). Fourteen male (50FS: 22.50 ± 0.58 s) performed a maximal sprint speedometer AS, PS, MS, IVV were assessed for correlational analysis. 50FS obtained in official competitions. Swimmers assigned to three groups based on actual 50FS: G21 (n = 2, 21.99 0.04 s), G22 6, 22.82 0.10 or G23 23.55 0.18 s). FANOVA curves. correlated AS (r −0.781, p 0.001) PS (ρ −0.766, 0.001), but not MS −0.185, 0.527) −0.323, 0.259). showed that faster achieved higher stayed longer at upper part curve. is related speedometer. should seek techniques maintain curve as long possible.