Abstract：
UNASSIGNED: Hill, V, Patterson, S, Buckthorpe, M, and Legg, HS. The acute effects of a preload upper-body power exercise on 50-m freestyle performance in youth swimmers. J Strength Cond Res 38(7): 1295-1299, 2024-This study aimed to investigate the acute effects of a medicine ball slam and the optimal recovery time required to induce a postactivation performance enhancement (PAPE) response on 50-meter freestyle swimming performance. Twenty-four (13 female, 11 male) competitive, adolescent swimmers (mean ± SD: age, 16.7 ± 1.2 years; height, 173.3 ± 6.7 cm; mass, 63.1 ± 6.4 kg) participated in a randomized crossover study. After the PAPE intervention (3 × 5 medicine ball slams), subjects had 1-minute, 4-minute, and 8-minute recovery periods before a 50-m maximal freestyle swim. A 1-way repeated-measures ANOVA revealed that different recovery times elicited changes in 50-m performance (F = 12.12, p < 0.0005). After 4 minutes of recovery, 50-m performance was 1.6% (0.47 seconds) faster (95% confidence interval [CI] [0.17-0.77], p < 0.001). When the data were split by sex, after 4 minutes of recovery, 50-m performance was 2% (0.64 seconds) faster for women (95% CI [0.279-0.998], p < 0.001). In conclusion, an upper-body power exercise, before performance, can induce a PAPE response and enhance 50-m freestyle performance after a 4-minute recovery period.
摘要：
■希尔，V,帕特森,S,巴克索普,M,还有Legg,Histheparticularoftheparticular.预加载上身力量运动对青年游泳者50米自由泳表现的急性影响。JStrengthCondRes38（7）：1295-1299，2024-本研究旨在研究药物球猛击的急性影响以及诱导50米自由泳后激活后性能增强（PAPE）反应所需的最佳恢复时间。二十四（13名女性，11男性)有竞争力的，青少年游泳者(平均值±SD：年龄，16.7±1.2年；身高，173.3±6.7cm;质量,63.1±6.4kg）参加了一项随机交叉研究。PAPE干预后（3×5药球猛击），受试者有1分钟，4分钟,和最大50米自由泳前的8分钟恢复期。单向重复测量方差分析显示，不同的恢复时间会引起50米性能的变化（F=12.12，p<0.0005）。恢复4分钟后，50米的性能快1.6%(0.47秒)(95%置信区间[CI][0.17-0.77]，p<0.001)。当数据按性别分割时，恢复4分钟后，女性的50米表现快2%（0.64秒）（95%CI[0.279-0.998]，p<0.001)。总之,上身力量锻炼，演出前,在4分钟的恢复期后，可以诱导PAPE反应并增强50米自由泳的表现。
