RT info:eu-repo/semantics/article T1 Post-Activation Performance Enhancement in Sprinters: Effects of Hard Versus Sand Surfaces A1 Pereira, Lucas A1 Moura, Túlio A1 Mercer, Valter A1 Fernandes, Victor A1 Bishop, Chris A1 Loturco, Irineu A1 Boullosa Álvarez, Daniel Alexandre A2 Educacion Fisica y Deportiva K1 Educación Física K1 Athletic Performance K1 Plyometrics K1 Potentiation K1 Track And Field K1 Muscle Strength AB [EN] This study aimed to compare the post-activation performance enhancement induced by successivedrop-jumps performed on hard and sand surfaces in sprint and jump performance of top-level sprinters.Athletes were tested on two occasions. On each visit they were allocated to one of the experimentalprotocols, which consisted of performing 2x5 drop-jumps from a box with the height of 60-cm on hard orsand surfaces in randomized order, seven days apart. Prior to and 7 and 15-min after executing drop-jumps,sprinters performed countermovement jumps and 60-m sprint tests. Differences between sprinting splits andsurfaces were assessed using a two-way analysis of variance with repeated measures. No significantdifferences in jump height or sprint time were observed (p>0.05), regardless of the surface used (i.e., hard orsand) during the conditioning activity (effect sizes [95% confidence intervals] ranging from 0.01 [-0.84;0.84]to 0.44 [-0.42;1.27]). Performing drop-jumps on sand or hard surfaces immediately before maximumsprinting bouts does not provide any advantage or disadvantage to top-level sprinters. Sprint coaches mayprescribe short-plyometric training activities on sand surfaces even close to competitions, bearing in mindthat this strategy will not compromise sprint-specific performance PB Termedia SN 1640-5544 LK https://hdl.handle.net/10612/19137 UL https://hdl.handle.net/10612/19137 NO Pereira, L.; Moura, T.; Mercer, V.; Fernandes, V.; Bishop, C.; Loturco, I.; Boullosa Álvarez, D. A. (2022). Post-Activation Performance Enhancement in Sprinters: Effects of Hard Versus Sand Surfaces. Journal of Human Kinetics, 82, 173-180 DS BULERIA. Repositorio Institucional de la Universidad de León RD 03-jun-2024