Summary

We aimed to establish jump power cut-offs for the composite outcome of either sarcopenia (EWGSOP2) or dysmobility syndrome using Asian and Caucasian cohorts. Estimated cut-offs were sex specific (women: < 19.0 W/kg; men: < 23.8 W/kg) but not ethnicity specific. Jump power has potential to be used in definitions of poor musculoskeletal health.

Purpose

Weight-corrected jump power measured during a countermovement jump may be a useful tool to identify individuals with poor musculoskeletal health, but no cut-off values exist. We aimed to establish jump power cut-offs for detecting individuals with either sarcopenia or dysmobility syndrome.

Methods

Age- and sex-matched community-dwelling older adults from two cohorts (University of Wisconsin-Madison [UW], Korean Urban Rural Elderly cohort [KURE], 1:2) were analyzed. Jump power cut-offs for the composite outcome of either sarcopenia defined by EWGSOP2 or dysmobility syndrome were determined.

Results

The UW (n = 95) and KURE (n = 190) cohorts were similar in age (mean 75 years) and sex distribution (68% women). Jump power was similar between KURE and UW women (19.7 vs. 18.6 W/kg, p = 0.096) and slightly higher in KURE than UW in men (26.9 vs. 24.8 W/kg, p = 0.050). In UW and KURE, the prevalence of sarcopenia (7.4% in both), dysmobility syndrome (31.6% and 27.9%), or composite of either sarcopenia or dysmobility syndrome (32.6% and 28.4%) were comparable. Low jump power cut-offs for the composite outcome differed by sex but not by ethnicity (< 19.0 W/kg in women; < 23.8 W/kg in men). Low jump power was associated with elevated odds of sarcopenia (adjusted odds ratio [aOR] 4.07), dysmobility syndrome (aOR 4.32), or the composite of sarcopenia or dysmobility syndrome (aOR 4.67, p < 0.01 for all) independent of age, sex, height, and ethnicity.

Conclusion

Sex-specific jump power cut-offs were found to detect the presence of either sarcopenia or dysmobility syndrome in older adults independent of Asian or Caucasian ethnicity.

中文翻译：

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定义用于肌肉减少症和运动障碍综合征的两条腿反运动跳跃力的国际临界值。

概括

我们旨在使用亚洲和高加索人队列为肌肉减少症 (EWGSOP2) 或运动障碍综合征的复合结果建立跳跃动力截止值。估计的临界值是性别特定的（女性：< 19.0 W/kg；男性：< 23.8 W/kg）但不是种族特定的。跳跃力有可能用于定义肌肉骨骼健康状况不佳。

目的

在反向运动跳跃期间测量的体重校正跳跃力可能是识别肌肉骨骼健康状况不佳的个体的有用工具，但不存在截止值。我们旨在建立用于检测肌肉减少症或运动障碍综合征个体的跳跃功率截止值。

方法

对来自两个队列（威斯康星大学麦迪逊分校 [UW]，韩国城市农村老年人队列 [KURE]，1:2）的年龄和性别匹配的社区老年人进行了分析。确定了由 EWGSOP2 定义的肌肉减少症或运动障碍综合征的复合结果的跳跃功率截止值。

结果

UW ( n  = 95) 和 KURE ( n  = 190) 队列在年龄（平均 75 岁）和性别分布（68% 为女性）方面相似。KURE 和 UW 女性的跳跃力相似（19.7 对 18.6 W/kg，p  = 0.096），KURE 的跳跃力略高于男性的 UW（26.9 对 24.8 W/kg，p = 0.050）。在 UW 和 KURE，肌肉减少症（两者均为 7.4%）、运动障碍综合征（31.6% 和 27.9%）或肌肉减少症或运动障碍综合征的复合（32.6% 和 28.4%）的患病率相当。复合结局的低跳跃功率截止值因性别而异，但与种族无关（女性 < 19.0 W/kg；男性 < 23.8 W/kg）。低跳跃力与肌肉减少症（调整后的优势比 [aOR] 4.07）、运动障碍综合征（aOR 4.32）或肌肉减少症或运动障碍综合征的复合（aOR 4.67，p  < 0.01）的几率升高有关，与年龄、性别无关、身高和种族。

结论

发现特定性别的跳跃功率截止值可以检测出与亚洲或白种人无关的老年人是否存在肌肉减少症或运动障碍综合征。