晨练时间适当夏天天亮比较早,很多有晨练习惯的人都是天一亮就出门锻炼。事实上,早晨太阳出来之前,空气中的二氧化碳浓度较高,难以呼吸到新鲜氧气。另外,经过夜间睡眠,早晨人体的血液黏度比较大,流动不畅,再加上天热,身体内的水分蒸发较多,过早进行晨练,容易导致心血管疾病。因此,习惯晨练的人夏天可以起得比冬天稍稍早一点,但不能太早,以免影响正常睡眠时间。其实想锻炼身体也不一定非在早上,最好根据自身的习惯和体质选择适合自己的锻炼时间,比如傍晚天气凉爽的时候。 Morning exercise time appropriate summer dawn earlier, many morning exercises are people go out daytime exercise. In fact, the concentration of carbon dioxide in the air is high before the morning sun comes out, making it hard to breathe fresh oxygen. In addition, after nighttime sleep, morning body blood viscosity is relatively large, poor circulation, coupled with hot weather, the body of water evaporation more premature morning exercise, easily lead to cardiovascular disease. Therefore, people who practice morning exercise summer can play a little earlier than winter, but not too early, so as not to affect the normal sleep time. In fact, want to exercise is not necessarily in the morning, it is best to choose according to their own habits and physical fitness for their own time, such as the evening when the weather is cool.