BACKGROUND Studies have shown that low cardiorespiratory fitness (CRF) and low muscle strength are independently associated with metabolic syndrome (MetS) in older adults. This study investigated the isolated and combined associations of low CRF and muscle strength with MetS in older adults. METHODS This cross-sectional study included 184 older adults (71% women; aged 65.6 ± 4.3 years) without a prior history of cardiovascular disease. CRF and muscle strength were assessed by the six-minute walking test and 30-s chair stand test, respectively. Results below the 25th percentile of the cohort were used to define low CRF and low muscle strength. MetS was defined according to NCEP-ATP III criteria. Poisson's regression with robust variance was used to determine the prevalence ratio (PR) for MetS. Reference group was composed by older adults with both CRF and muscle strength above 25th percentile. RESULTS Prevalence of low CRF, low muscle strength, and combined low CRF and muscle strength was 22.8%, 17.9%, and 10.9%, respectively. The prevalence of MetS was 56.5% in the full cohort. Isolated low CRF (PR 1.05, 95% CI 0.73 to 1.52; p = 0.793) and muscle strength (PR 1.09, 95% CI 0.74 to 1.61; p = 0.651) were not associated with MetS in the adjusted analysis. Combined low CRF and muscle strength was associated with MetS (PR 1.45, 95% CI 1.09 to 1.93; p = 0.011). CONCLUSIONS Older adults with combined, but not isolated, low CRF and muscle strength showed an increased risk for MetS.

中文翻译：

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老年人心肺健康和肌肉力量与代谢综合征的独立和综合关联：一项横断面研究。

背景研究表明，老年人的低心肺适应（CRF）和低肌肉强度与代谢综合征（MetS）独立相关。这项研究调查了老年人中低CRF和肌肉力量与MetS的孤立和组合关联。方法这项横断面研究包括184位没有心血管疾病史的老年人（71％为女性； 65.6±4.3岁）。CRF和肌肉力量分别通过6分钟步行测试和30 s椅子站立测试进行评估。队列第25个百分点以下的结果用于定义低CRF和低肌肉强度。MetS是根据NCEP-ATP III标准定义的。具有稳健方差的泊松回归用于确定MetS的患病率（PR）。参比组由CRF和肌肉强度均高于25％的老年人组成。结果低CRF，低肌肉强度以及合并的低CRF和肌肉强度的患病率分别为22.8％，17.9％和10.9％。在整个队列中，MetS的患病率为56.5％。在调整后的分析中，孤立的低CRF（PR 1.05，95％CI 0.73至1.52; p = 0.793）和肌肉强度（PR 1.09，95％CI 0.74至1.61; p = 0.651）与MetS不相关。较低的CRF和肌肉力量与MetS相关（PR 1.45，95％CI 1.09至1.93； p = 0.011）。结论合并但不是孤立的低CRF和肌肉力量的成年人显示出MetS的风险增加。和10.9％。在整个队列中，MetS的患病率为56.5％。在调整后的分析中，孤立的低CRF（PR 1.05，95％CI 0.73至1.52; p = 0.793）和肌肉强度（PR 1.09，95％CI 0.74至1.61; p = 0.651）与MetS不相关。较低的CRF和肌肉力量与MetS相关（PR 1.45，95％CI 1.09至1.93； p = 0.011）。结论合并但不是孤立的低CRF和肌肉力量的成年人显示出MetS的风险增加。和10.9％。在整个队列中，MetS的患病率为56.5％。在调整后的分析中，孤立的低CRF（PR 1.05，95％CI 0.73至1.52; p = 0.793）和肌肉强度（PR 1.09，95％CI 0.74至1.61; p = 0.651）与MetS不相关。较低的CRF和肌肉力量与MetS相关（PR 1.45，95％CI 1.09至1.93； p = 0.011）。结论合并但不是孤立的低CRF和肌肉力量的成年人显示出MetS的风险增加。