Objectives This study aimed to examine whether maintaining supervised gym- and home-based exercises for an extended time of period could decrease seasonal variations of metabolic outcomes in overweight and obese Japanese adults. Methods This retrospective study recruited 54 overweight and obese outpatients who started exercising in 2006–2010 and analysed their metabolic outcomes for 5 years from March 2011 to February 2016. In this group, 26 participants performed moderate-intensity aerobic exercise (MIAE) for 30–40 min/day for at least 2 days/week, supervised by physical therapists at a hospital gym (GYM) during the observation period. Conversely, 28 participants were asked to perform MIAE by themselves at or around their homes (HOME) for the same duration. Results The body mass index (BMI), waist circumference and homoeostasis model assessment of insulin resistance (HOMA-IR) values in winter were higher than those in other seasons in the HOME group but not in the GYM group. The annual ranges of BMI, waist circumference, fasting plasma glucose and HOMA-IR in the GYM group were smaller than those in the HOME group. Conclusion Maintaining supervised gym-based exercise, as opposed to home-based exercise, may decrease seasonal variations of some metabolic outcomes in overweight and obese Japanese adults.

中文翻译：

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维持有监督的体育锻炼和家庭锻炼对日本超重和肥胖日本成年人代谢结局的季节性变化的影响

目的这项研究旨在检查在延长的时间段内保持有监督的体育锻炼和家庭锻炼是否可以减少超重和肥胖日本成年人新陈代谢的季节性变化。方法这项回顾性研究招募了54位超重和肥胖的门诊患者，他们从2006年至2010年开始运动，并分析了2011年3月至2016年2月的5年间的代谢结果。在该组中，有26名参与者进行了30次中等强度的有氧运动（MIAE）观察期间在医院体育馆（GYM）的物理治疗师的监督下，每天至少40天，每天至少2天。相反，有28名参与者被要求在自己的家中或附近（HOME）自己进行MIAE，持续时间相同。结果体重指数（BMI），冬季腰围和稳态模型评估的胰岛素抵抗（HOMA-IR）值高于HOME组的其他季节，但GYM组则没有。GYM组的BMI，腰围，空腹血糖和HOMA-IR的年度范围小于HOME组。结论维持有监督的体育锻炼而不是家庭健身可以减少超重和肥胖日本成年人某些代谢结果的季节性变化。