Effects of 8 weeks of combined strength and plyometric training on lower limb vertical stiffness and jump performance in elite long jump athletes.

Between-subjects contrasts indicated a non-significant group effect (F (1,23) = 2.132, P = 0.152), a highly significant gender effect (F (1,23) = 53.257, P < 0.001), and a non-significant group × gender interaction (F (1,23) = 1.086, P = 0.304).

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Although modest gains were observed in the ST group, these did not reach statistical significance.

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