Purpose: Replicating the studies of Gibson et al and Brownstein et al to assess performance, and physiological, and perceived variables during a repeated sprint protocol (RSP) with standardized versus self-selected recovery in youth soccer players. Methods: Nineteen male soccer players (age 13.1 [1.3] y) completed 2 separate RSPs. RSP₁: 10 × 30-m sprints with 30-second recovery and RSP₂: 10 × 30-m sprints interspersed with self-selected recovery periods. Mean time of both 10 × 30-m RSPs and self-selected recovery periods of RSP₂ were assessed. Heart rate, blood lactate concentration, and rates of perceived exertion were measured following RSPs. Results: RSP₂ revealed longer recovery periods (RSP₁: 30.0 [0.0] s; RSP₂: 39.0 [7.7] s; P < .001; effect size d = 1.648) with shorter repeated sprint time (mean 30-m sprint time: RSP₁: 4.965 [0.256] s; RSP₂: 4.865 [0.227] s; P = .014; d = 0.414). Blood lactate concentration (P = .002–.005; d = 0.730–0.958), heart rate (P < .001; d = 1.353), and rates of perceived exertion (RSP₁: 14.9 [1.9]; RSP₂: 12.9 [2.1]; P = .016; d = 1.046) were higher following RSP₁. Conclusion: In contrast to the original studies, the present replication study demonstrated that self-selected recovery periods during a RSP leads to better repeated sprint performance compared with standardized recovery periods in youth soccer players. The better repeated sprint performance with individual recovery durations in RSP₂ was achieved with less physiological and perceived effort.

目的：复制 Gibson 等人和 Brownstein 等人的研究，以评估青少年足球运动员在重复冲刺协议 (RSP) 期间的表现、生理和感知变量，以及标准化恢复和自我选择恢复。方法： 19 名男性足球运动员（年龄 13.1 [1.3] 岁）完成了 2 个独立的 RSP。RSP _1：10 × 30 米短跑，恢复时间为 30 秒，RSP 2：10 _× 30 米短跑，中间穿插自选恢复期。评估了 10 × 30-m RSP 的平均时间和 RSP _{2的自选恢复期。}在 RSP 之后测量心率、血乳酸浓度和感知用力率。结果： RSP₂揭示了更长的恢复期（RSP ₁：30.0 [0.0] s；RSP ₂：39.0 [7.7] s；P  < .001；效应量d  = 1.648）和更短的重复冲刺时间（平均 30 米冲刺时间：RSP ₁：4.965 [0.256] 秒；RSP ₂：4.865 [0.227] 秒；P  = .014；d  = 0.414）。血乳酸浓度（P  = .002–.005；d  = 0.730–0.958）、心率（P  < .001；d = 1.353） 和自觉运动率（RSP ₁：14.9 [1.9]；RSP ₂：12.9 [2.1]；P  = .016；d = 1.046) 在 RSP ₁之后更高。结论：与最初的研究相比，本复制研究表明，与青少年足球运动员的标准化恢复期相比，RSP 期间的自我选择恢复期导致更好的重复冲刺表现。_{在 RSP 2}中，通过较少的生理和感知努力实现了具有个人恢复持续时间的更好的重复冲刺表现。