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The changes in tendon length (a) and tendon velocity (b) during eccentric (except for noCMJ) and concentric phases of noCMJ, CMJ, and DJ before (open) and after (closed) training. CON; concentric phase, ECC; eccentric phase, noCMJ; no counter‐movement jump, CMJ; counter‐movement jump, DJ; drop jump. Data are mean ± SD. Significant difference from before training: *p < 0.05
