The aim of the study was to compare the effects of an in-season 5-week high-intensity training (HIT) with a concurrent HIT plus eccentric overload training (CT) program on male amateur team-sports players’ fitness performance. Twenty-two athletes were randomly assigned to HIT (n=10) or CT (n=12). Both groups completed a HIT program. The CT group also completed 2-3 sets × 6 repetitions of eccentric overload training. Before and after training, performance was assessed for flexibility, change of direction ability (COD), repeated sprint ability for best time (RSAb), mean time (RSAm) and slowest time (RSAs), jumping, endurance, and VO2max. Within-group analyses in both groups showed substantial better scores on RSAb and RSAm, COD, endurance and VO2max. Between-group analyses showed greater improvements in RSAb, RSAs, RSAm, COD, and jumping after CT compared to HIT. In conclusion, compared to HIT alone, concurrent eccentric overload and HIT training within the same session concurrently improved RSA, COD, jump, and endurance performance.

中文翻译：

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同时进行的偏心超负荷和高强度间歇训练对团队运动运动员绩效的影响

这项研究的目的是比较一个为期5周的高强度训练（HIT）和同时进行的HIT加偏心超负荷训练（CT）程序对男性业余团队运动运动员身体素质的影响。22名运动员被随机分配到HIT（n = 10）或CT（n = 12）。两组均完成了HIT计划。CT组还完成了2-3组×6次偏心超负荷训练的重复。训练前后，评估其表现的灵活性，方向改变能力（COD），最佳时间的重复冲刺能力（RSAb），平均时间（RSAm）和最慢时间（RSAs），跳跃，耐力和最大摄氧量。两组的组内分析均显示RSAb和RSAm，COD，耐力和VO2max得分较高。组间分析显示RSAb，RSAs，RSAm，COD，与HIT相比，在CT后跳跃。总之，与单独的HIT相比，在同一会话中同时进行的偏心超负荷和HIT训练可以同时提高RSA，COD，跳跃和耐力性能。