Division of Hematology/Oncology, Medical College of Wisconsin, 8701 Watertown Plank Parkway, Milwaukee, WI, 53226, USA.
Division of Cardiovascular Medicine, Medical College of Wisconsin, 8701 Watertown Plank Parkway, Milwaukee, WI, 53226, USA.
Int J Behav Med. 2024 Feb;31(1):109-115. doi: 10.1007/s12529-023-10152-7. Epub 2023 Feb 28.
Body mass index (BMI) above ≥ 25 kg/m is associated with increased risk for cancer-related morbidity and mortality. Achieving recommended amounts of physical activity (PA), sedentary time (ST), and sleep can help cancer survivors (CS) attain a healthy BMI. This cross-sectional study examined the potential role of reallocating time between moderate and light PA, ST, and sleep on BMI in CS.
A sample of CS (N = 73, M = 53.7 ± 12.9) wore an activPAL and Actiwatch accelerometer for 7 days, 24 h per day to measure PA intensity and sleep, respectively. Self-reported height and weight or scale/stadiometer were used to calculate BMI. Isotemporal substitution models were used to reallocate time, averaged over the 7-day period, from one activity of interest to another and examine the associations with BMI. Statistical significance was set at p < .05.
The following reallocations of 30 min were significantly associated with BMI: sleep to ST (+ 0.80 kg/m, p = 0.02) and ST to light PA (- 0.53 kg/m, p = 0.008). No significant associations with BMI were observed for reallocating time to or away from moderate-vigorous PA.
The results of this study suggest that sleep and light PA may have important implications for achieving a healthy BMI in CS. Therefore, future research should include interventions which target light PA and sleep to determine if they can improve BMI in CS.
体重指数（BMI）高于≥25kg/m²与癌症相关发病率和死亡率的增加有关。达到推荐量的身体活动（PA）、久坐时间（ST）和睡眠可以帮助癌症幸存者（CS）达到健康的 BMI。本横断面研究探讨了在 CS 中重新分配中等到轻度 PA、ST 和睡眠时间对 BMI 的潜在作用。
本研究样本为 CS（N=73，M=53.7±12.9），佩戴 activPAL 和 Actiwatch 加速度计 7 天，每天 24 小时，分别测量 PA 强度和睡眠。自我报告的身高和体重或秤/测高计用于计算 BMI。等时替代模型用于重新分配在 7 天期间平均的时间，从一种感兴趣的活动转移到另一种活动，并检查与 BMI 的关联。统计显著性设置为 p<.05。
以下 30 分钟的重新分配与 BMI 显著相关：睡眠至 ST（+0.80kg/m，p=0.02）和 ST 至轻度 PA（-0.53kg/m，p=0.008）。将时间重新分配到或远离中度至剧烈 PA 与 BMI 没有显著关联。
本研究结果表明，睡眠和轻度 PA 可能对 CS 实现健康 BMI 具有重要意义。因此，未来的研究应该包括针对轻度 PA 和睡眠的干预措施，以确定它们是否可以改善 CS 的 BMI。
