INTRODUCTION/PURPOSE Heavy lifting may produce strain on the pelvic floor muscles (PFM) due to high increases in intra-abdominal pressure, but knowledge of the impact of weightlifting on the PFM is lacking. Therefore, this study aimed to investigate acute effects of heavy weightlifting on the PFM in strength-trained women and whether general strength in whole-body exercises correlated to PFM strength. METHODS Forty-seven nulliparous women between 18 and 35 yr who regularly performed weightlifting and were able to lift their own body weight × 1.2 in back squat and 1.5 in deadlift were included in this experimental crossover study. They participated in baseline evaluations (questionnaire/measurements of background characteristics and pelvic floor disorders, one-repetition maximum (1RM) tests in back squat and deadlift) and one test day where they were randomized to start with 60 min of weightlifting (four sets of four repetitions at 75%-85% of 1RM in back squat and deadlift) or seated rest of 60 min. Vaginal pressure measurements of PFM resting pressure, strength, and endurance and surface electromyography measurements of PFM resting activity were performed before/after weightlifting and rest. RESULTS No statistically significant differences were found when comparing the change in PFM resting pressure, strength, endurance, and resting activity after heavy weightlifting and rest. There were no statistically significant correlations between PFM strength and maximum (1RM) or relative strength (1RM/bodyweight) in either back squat or deadlift. CONCLUSIONS Our results imply that heavy weightlifting is well tolerated by the PFM in short term among young, nulliparous, and strength-trained women. Strength in whole-body exercises was not correlated to PFM strength.

中文翻译：

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举重对接受力量训练的女性盆底肌肉的急性影响：实验交叉研究。


引言/目的 由于腹内压大幅增加，举重可能会对盆底肌肉 (PFM) 产生拉伤，但目前尚不清楚举重对 PFM 的影响。因此，本研究旨在调查大重量举重对接受过力量训练的女性 PFM 的急性影响，以及全身运动中的一般力量是否与 PFM 力量相关。方法 这项实验性交叉研究纳入了 47 名 18 至 35 岁之间的未生育女性，她们经常进行举重运动，并且能够在后蹲中将自身体重提升 1.2 倍，在硬拉中提升 1.5 倍。他们参加了基线评估（背景特征和骨盆底疾病的问卷调查/测量、后蹲和硬拉的单次最大重复次数 (1RM) 测试）和一个测试日，他们被随机从 60 分钟的举重开始（四组后蹲和硬拉中以 1RM 的 75%-85% 重复四次）或坐姿休息 60 分钟。在举重和休息之前/之后进行 PFM 静息压力、力量和耐力的阴道压力测量以及 PFM 静息活动的表面肌电图测量。结果 比较大举重和休息后 PFM 静息压力、力量、耐力和静息活动的变化，没有发现统计学上的显着差异。在后深蹲或硬拉中，PFM 力量与最大力量（1RM）或相对力量（1RM/体重）之间不存在统计学上显着的相关性。结论 我们的结果表明，年轻、未产过且接受过力量训练的女性在短期内对大重量举重的耐受性良好。全身锻炼的力量与 PFM 力量不相关。