Department of Sports Medical Sciences, Shinshu University Graduate School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan.
Department of Sports and Health Sciences, Faculty of Human Health Science, Matsumoto University, Matsumoto, 390-1295, Japan.
Int J Biometeorol. 2018 Apr;62(4):643-654. doi: 10.1007/s00484-017-1473-3. Epub 2017 Nov 17.
Habitual exercise training is recommended to young people for their health promotion, but adherence may be influenced by atmospheric temperature (T ) if performed outdoors. We compared the adherence to and the effects of a home-based interval walking training (IWT) program on sedentary female college students between winter and summer. For summer training over 176 days, 48 subjects (18-22 years old) were randomly divided into two groups: the control group (CNT, n = 24), which maintained a sedentary lifestyle as before, and the IWT group (IWT, n = 24), which performed IWT while energy expenditure was monitored by accelerometry. For winter training over 133 days, another group of 47 subjects (18-24 years old) was randomly divided into CNT (n = 24) and IWT (n = 23), as in summer. The peak T per day was 26 ± 6 °C (SD) (range of 9-35 °C) in summer, much higher than 7 ± 5 °C (range of - 3-20 °C) in winter (P < 0.001). During a ~ 50-day vacation period, participants walked 2.1 ± 0.3 (SE) days/week in IWT, less than 4.2 ± 0.3 days/week in IWT (P < 0.001), with half of the energy expenditure/week for fast walking during the winter vacation (P < 0.02), whereas both IWT groups walked ~ 2 days/week during a school period (P > 0.8). After training, the peak aerobic capacity and knee flexion force increased in IWT (P < 0.01) but not in CNT (P > 0.3). Conversely, these parameters decreased in the summer groups. Thus, the adherence to and effects of IWT on sedentary female college students in Japan decreased in summer at least partially due to a high T .
习惯性运动训练有益于年轻人的健康，但如果在户外进行，可能会受到大气温度（T）的影响。我们比较了冬季和夏季进行家庭间隔步行训练（IWT）方案对久坐女大学生的坚持度和效果。在 176 天的夏季训练中，48 名受试者（18-22 岁）被随机分为两组：对照组（CNT，n = 24），保持之前的久坐生活方式；IWT 组（IWT，n = 24），通过加速度计监测能量消耗进行 IWT。在 133 天的冬季训练中，另一组 47 名受试者（18-24 岁）被随机分为 CNT（n = 24）和 IWT（n = 23），与夏季相同。夏季每天的最高 T 为 26 ± 6°C（SD）（范围为 9-35°C），远高于冬季 7 ± 5°C（范围为-3-20°C）（P < 0.001）。在大约 50 天的假期期间，IWT 组参与者每周步行 2.1 ± 0.3（SE）天，少于 IWT 组每周 4.2 ± 0.3 天（P < 0.001），冬季假期每周快走的能量消耗减少一半（P < 0.02），而两个 IWT 组在学期期间每周步行约 2 天（P > 0.8）。训练后，IWT 组的峰值有氧能力和膝关节屈曲力增加（P < 0.01），而 CNT 组没有增加（P > 0.3）。相反，这些参数在夏季组中下降。因此，IWT 对日本久坐女大学生的坚持度和效果至少部分由于 T 较高而在夏季降低。
