Exercise-induced muscle damage (EIMD) is a well-investigated area, however there is a paucity of data surrounding the damage response in females. The aim of this study was to examine the damage responses from a sport-specific bout of repeated sprints in female athletes. Eleven well-trained females (mean ± SD; age: 22 ± 3 years; height: 166.6 ± 5.7 cm; mass: 62.7 ± 4.5 kg) in the luteal phase of the menstrual cycle completed a repeated sprint protocol designed to induce EIMD (15 × 30 m sprints). Creatine kinase, countermovement jump height, knee extensor maximal voluntary isometric contraction (MVIC) force, delayed onset muscle soreness (DOMS), 30-m sprint time, and limb girth were recorded before, after, 24, 48, and 72 hours after exercise. Creatine kinase was elevated at 24, 48, and 72 hours (p ≤ 0.05), peaking at 24 hours (+418%) and returning toward baseline at 72 hours. Countermovement jump height was reduced immediately after, 24, and 48 hours (p ≤ 0.05). Sprint performance was also negatively affected immediately after, 24, 48, and 72 hours after exercise. Muscle soreness peaked at 48 hours (p < 0.01) and remained significantly elevated at 72 hours after exercise (p < 0.01). Limb girth and MVIC did not alter over time. This study provides new information on the EIMD response in trained females after a sport-specific bout of repeated sprints. Importantly, this damage response has the potential to negatively affect performance for several days after exercise.

译文

:运动引起的肌肉损伤(EIMD)是一个研究充分的领域,但是关于女性损伤反应的数据很少。这项研究的目的是检查女运动员重复短跑的一项运动特定回合对损伤的反应。 11名受过良好训练的女性(平均±SD;年龄:22±3岁;身高:166.6±5.7 cm;体重:62.7±4.5 kg)在月经周期的黄体期完成了旨在诱发EIMD的重复冲刺方案(15 ×30 m冲刺)。在运动前,运动后,运动后,运动24、48和72小时之前记录肌酸激酶,反跳高度,膝盖伸肌的最大自发等长收缩(MVIC)力,迟发性肌肉酸痛(DOMS),30 m冲刺时间和肢体围长。肌酸激酶在24、48和72小时升高(p≤0.05),在24小时达到峰值(418%),在72小时回到基线。在24小时和48小时后,反向移动跳跃高度立即减小(p≤0.05)。运动后,运动后24、48和72小时,短跑成绩也受到负面影响。肌肉酸痛在48小时达到峰值(p <0.01),并在运动后72小时保持明显升高(p <0.01)。肢体围长和MVIC不会随时间改变。这项研究提供了针对特定运动的反复冲刺后受过训练的女性的EIMD反应的新信息。重要的是,这种损伤反应可能会在运动后几天内对运动产生负面影响。

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