推荐回答(2个)
我来回答夏天从事体育锻炼时最好是安排在早晨、上午和傍晚等气温比较凉爽的时候,因为这些时间可以避免发生中暑和日射病。大家知道,在一般情况下从事体育锻炼时,尽管人体不断产生热量,但在体温调节中枢的调节下,通过辐射、对流、传导和汗液蒸发等途径,使体内多余的热量散发掉,从而维持体温的相对稳定。但是,在气温高、湿度大的条件下运动时,人体的散热过程发生困难,于是体热大量积累,体温急剧升高,而导致中暑。轻者有头晕、头痛、心悸、恶心等感觉;重者常出现排汗停止、昏迷、不省人事,如果不及时抢救,常有生命危险。另外,长时间在阳光下暴晒,脑和脑膜很容易发生损伤,而引起与中暑相类似的日射病。夏天除早晨、上午和傍晚比较凉快之外,其他时间的温度都很高,特别在ll—16点钟这一段时间更为严重。因此,应尽量避免在该一段时间内从事体育锻炼。在早晨、上午和傍晚这些稍微凉爽的时间里,又以早晨锻炼身体更为适宜。
楼主你好;
傍晚
5点到
8点
,体力和耐力是一天中的最高峰
,是运动的最佳时间
,会达到非常好的效果
,而且对睡眠相当有利.
深夜的
1点到
4点
,是人体大部分器官放慢或停止工作的时候
,是我们可以充分休整的时间
,肌肉完全放松
,血压、脑部供血量、脉搏会慢慢减少。
清晨
5点到
7点
,肌体开始苏醒
,这时候起床很快就精神饱满
,尤其是
7点的时候
,肾上腺皮质激素分泌进入高潮
,免疫功能加强
,很适合运动。
上午
8点到
12点
,是神经最兴奋的时候
,记忆力、心脏、热情全部处于最佳状态
,所以这段时间适合工作、学习或出游
,不要做运动。
下午
1点到
4点
,尤其是春天和夏天
,人容易疲劳、犯困
,这时候最好休息
,不要在午饭后做大运动量运动。
晚上
10点钟左右
,体温开始下降
,睡意会慢慢向你袭来
,身体的功能趋于低潮
,不适合再做剧烈运动。
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