PurposeAdults with subjective cognitive decline (SCD), the self-reported concern of reduced cognitive function, are recommended to do physical activity for its brain health benefits. US adults aged ≥45 with SCD are less likely to meet the American College of Sports Medicine (ACSM) aerobic activity recommendations. Their engagement in muscle-strengthening activities is unknown. We aimed to identify if US adults aged ≥45 with SCD are less likely to do twice-weekly muscle-strengthening activities compared to those without SCD.DesignSecondary analysis of the 2019 Behavioral Risk Factor Surveillance System (BRFSS) data.Sample114 164 respondents, representing approximately 59 million US adults aged ≥45.MeasuresSCD was indicated if the respondent reported confusion or memory loss during the past 12 months (yes/no). Respondents reported the frequency of muscle-strengthening activities, which we categorized as meeting the ACSM’s recommendations (2+ times per week) or not (<2 times per week).AnalysisCrude and adjusted logistic regression models controlling for variables associated with SCD and muscle-strengthening activities. The models used sample weights to represent US adults in the included 31 states and Washington D.C.ResultsUS adults aged ≥45 with SCD were less likely to do twice-weekly muscle-strengthening activities than those without SCD (28.6% [SE: .8%] vs 33.5% [SE: .3%], adjusted OR, .9; 95% CI: .9-1.0).ConclusionPrimary care providers should encourage middle-aged and older patients to engage in muscle-strengthening and aerobic activities.

中文翻译：

---

美国中老年人主观认知能力下降与每周两次肌肉强化活动之间的关联：2019 年行为危险因素监测系统分析

目的建议患有主观认知能力下降（SCD）的成年人进行体力活动，以有益于大脑健康。年龄≥45 岁且患有 SCD 的美国成年人不太可能达到美国运动医学会 (ACSM) 的有氧运动建议。他们参与肌肉强化活动尚不清楚。我们的目的是确定年龄≥45岁的患有SCD的美国成年人与没有SCD的人相比，是否不太可能每周进行两次肌肉强化活动。设计对2019年行为风险因素监测系统（BRFSS）数据进行二次分析。样本114 164名受访者，代表大约 5900 万年龄≥45 岁的美国成年人。如果受访者在过去 12 个月内报告精神错乱或记忆丧失（是/否），则表明需要进行 SCD 测量（是/否）。受访者报告了肌肉强化活动的频率，我们将其分类为满足 ACSM 的建议（每周 2 次以上）或不满足（每周<2 次）。分析控制与 SCD 和肌肉相关变量的粗略和调整后的逻辑回归模型加强活动。这些模型使用样本权重来代表 31 个州和华盛顿特区的美国成年人结果，与没有 SCD 的成年人相比，年龄≥45 岁的患有 SCD 的美国成年人每周进行两次肌肉强化活动的可能性较小（28.6% [SE: 0.8%] vs 33.5% [SE: .3%]，调整后 OR，0.9；95% CI：0.9-1.0）。结论初级保健提供者应鼓励中老年患者从事肌肉强化和有氧活动。