Kassiano Witalo, Costa Bruna, Nunes João Pedro, Cyrino Letícia T, Nascimento Matheus A, Tomeleri Crisieli, Antunes Melissa, Gobbo Luís A, Ribeiro Alex S, Coelho-E-Silva Manuel J, Silva Analiza M, Sardinha Luís B, Cyrino Edilson S
Metabolism, Nutrition, and Exercise Laboratory, Physical Education and Sport Center, State University of Londrina, Londrina, PR, Brazil.
Metabolism, Nutrition, and Exercise Laboratory, Physical Education and Sport Center, State University of Londrina, Londrina, PR, Brazil.
Exp Gerontol. 2022 Sep;166:111867. doi: 10.1016/j.exger.2022.111867. Epub 2022 Jun 9.
Although one-repetition maximum (1RM) and lean soft tissue (LST) are the most common measures to assess muscular strength and skeletal muscle mass in older adults, reference data is still missing. Therefore, the present study aimed to produce reference values for the 1RM tests and LST in physically independent older women. Furthermore, the effect of age and body segment on these outcomes was examined. Five hundred and eleven older women aged 60-88 years participated in the present study. The 1RM tests were performed on chest press, leg extension, and preacher curl exercises. Dual-energy X-ray absorptiometry exams were used to determine total and segmental LST. The 1RM and LST average values: chest press = 44.0 ± 11.1 kg, leg extension = 48.8 ± 11.8 kg, preacher curl = 21.6 ± 5.4 kg; trunk LST = 19.0 ± 2.7 kg, lower-limbs LST = 12.5 ± 1.9 kg, upper-limbs LST = 4.0 ± 0.7 kg, appendicular LST = 16.6 ± 2.6, total LST = 38.5 ± 5.2 kg. The age-related declines in 1RM chest press and leg extension were higher than in preacher curl. The present study provides reference values for 1RM of different body segments and total and segmental LST in older women. In addition, our results revealed a reduction of muscular strength and LST with increasing age, and the magnitude of the age-related strength reduction depends on the body segment analyzed.
尽管一次重复最大值（1RM）和瘦软组织（LST）是评估老年人肌肉力量和骨骼肌质量最常用的指标，但仍缺乏参考数据。因此，本研究旨在得出身体功能独立的老年女性1RM测试和LST的参考值。此外，还研究了年龄和身体部位对这些结果的影响。511名年龄在60 - 88岁的老年女性参与了本研究。1RM测试针对卧推、腿伸展和牧师椅弯举练习进行。采用双能X线吸收法检查来确定全身和各部位的LST。1RM和LST的平均值：卧推 = 44.0 ± 11.1千克，腿伸展 = 48.8 ± 11.8千克，牧师椅弯举 = 21.6 ± 5.4千克；躯干LST = 19.0 ± 2.7千克，下肢LST = 12.5 ± 1.9千克，上肢LST = 4.0 ± 0.7千克，附属LST = 16.6 ± 2.6，全身LST = 38.5 ± 5.2千克。1RM卧推和腿伸展的年龄相关下降幅度高于牧师椅弯举。本研究提供了老年女性不同身体部位1RM以及全身和各部位LST的参考值。此外，我们的结果显示，随着年龄增长，肌肉力量和LST会下降，且年龄相关的力量下降幅度取决于所分析的身体部位。
