Clinical Implications for Muscle Strength Differences in Women of Different Age and Racial Groups: The WIN Study.
Clinical Implications for Muscle Strength Differences in Women of Different Age and Racial Groups: The WIN Study.
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不同年龄和种族群体女性肌肉力量差异的临床意义：WIN 研究。
DOI：
10.1097/jwh.0b013e318212570c
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
MorrowJr,JamesR
中科院分区：
文献类型：
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作者：
Trudelle-Jackson,Elaine;Ferro,Emerenciana;MorrowJr,JamesR
背景：肌力下降与女性的功能下降密切相关，根据体重调整后的股四头肌力量较低的女性更容易患膝关节骨性关节炎。目的：比较不同年龄/种族的女性体重调整后的力量。研究设计：对918名年龄在20-83岁的女性进行肌力的横断面研究（M±SD= 52±13）。方法：进行骨科检查，包括测量握力和下肢力量（髋外展肌/外旋肌，膝屈肌/伸肌）。白色（n= 699）和非洲裔美国人（AA）（n= 164）女性的数据分为年轻（20-39岁，n= 139）、中年（40-54岁，n= 300）和老年（55岁以上，n = 424）。平均值和标准偏差的强度调整体重计算为每个年龄和种族组，并使用2-way多变量方差分析和事后检验进行比较。092)年龄和种族的主效应显著（P<. 001）。两两比较显示，所有年龄组之间的膝关节伸肌和屈肌力量的显着差异。在握力和髋关节外旋力量方面，中老年组之间存在显著差异。髋外展肌力量在青年组和中年组之间存在差异。AA女性在所有肌群中的力量均低于白色女性（P<0.05）。05)结论：所有肌群的力量都随着年龄的增长而下降，但下降的幅度因肌肉而异。强化计划应该针对不同的肌肉，这取决于女性的年龄和种族。
Background:Reduction in muscle strength is strongly associated with functional decline in women, and women with lower quadriceps strength adjusted for body weight are more likely to develop knee osteoarthritis.Objective:To compare body weight–adjusted strength among women of different age/racial groups.Study Design:Cross-sectional study of muscle strength in 918 women aged 20-83 (M±SD= 52±13).Methods:An orthopedic examination was conducted including measurement of handgrip and lower extremity strength (hip abductors/external rotators, knee flexors/extensors). Data were grouped into young (20-39 years, n= 139), middle (40-54 years, n= 300), and older (55+ years, n= 424) ages for white (n= 699) and African American (AA)(n= 164) women. Means and standard deviations for strength adjusted for body weight were calculated for each age and racial group and compared using 2-way multivariate analysis of variance and post hoc tests.Results:No significant age-by-race interaction (P=. 092) but significant main effects for age and race (P<. 001). Pairwise comparisons revealed significant differences in knee extensor and flexor strength between all age groups. For grip and hip external rotator strength, significant differences were found between the middle and older groups. Differences in hip abductor strength were found between the young and middle-aged groups. AA women had lower strength than white women in all muscle groups (P<. 05) except hip external rotators.Conclusions:Strength decreased with age in all muscle groups but magnitude of decrease varied by muscle. Strengthening programs should target different muscles, depending on a woman's age and race.