第3017期:The best time to exercise depends on your body clock, study finds

This new study from Pakistan suggests synchronising exercise to match people's natural sleep-wake cycles or internal body clock could offer the greatest health benefits.这项来自巴基斯坦的新研究表明，将锻炼时间和个人的睡眠觉醒周期或体内生物钟同步，能给健康带来最多益处。Volunteers who tried it had better sleep, lower blood pressure and healthier blood sugar levels overall. In the study, a group of 40 to 60-year-olds with at least one heart risk were categorised: 70 as morning larks and 64 as night owls. Over three months, some did almost daily exercises at times that matched their body clock, while others did the opposite.尝试了这种锻炼方式的志愿者普遍睡眠质量更好、血压更低且整体血糖水平更健康。研究中，一组年龄在 40 到 60 岁、具有至少一项心脏病风险因素的人被分为了两类： 70 个 “百灵鸟” 和 64 个 “夜猫子”。在三个月间，一部分人几乎每天都在符合生物钟的时间锻炼，而另一部分人则相反。The findings suggested that forcing a 5am workout on a night owl didn't give great results. Why? The researchers say because the body clock affects hormone and energy levels across the day, which in turn, could influence exercise performance and adherence.研究结果表明，强迫一个 “夜猫子” 在清晨五点锻炼并没有带来很好的效果。这是为什么呢？研究人员解释说，这是因为生物钟会影响人全天的激素和能量水平，进而影响运动表现和对锻炼计划的坚持。