夏季锻炼宜选游泳跑步等小强度运动方式
发布时间:2011-06-15
来源:凤凰网
很多人不爱在夏天运动,因为随着气温升高,锻炼时会出现乏力、气短、头晕等现象。专家表示,出现这样的症状,很多时候并不是气温惹的祸,而是锻炼方式和时间的选择问题,甚至可能是体质的问题。气温升高时,同样的运动强度下,人的心跳会更快一些。当人们待惯了空调房、习惯了以车代步,汗腺、皮肤、心脏对热的耐受能力就会下降。
锻炼时机也很有讲究。许多人喜欢晨练,其实,早晨空气中的二氧化碳浓度较高,难以呼吸到充足的氧气。另外,经过夜间睡眠,早晨人体的血液黏度比较大,流动不畅,加上天热,身体内的水分蒸发较多,晨练过早,容易诱发心血管疾病。近地面的空气中有大量的氮氧化物、铅等有害物质,起早锻炼,运动时的深呼吸会导致吸入更多有害物质,长期下去,会出现乏力、气短、头晕等症状,还可能导致气管、咽喉发炎。
建议大家夏天不妨从小强度的运动开始,每天积累各种“小运动”,如游泳、打网球、打羽毛球、跑步、快走等,这些一次性消耗体能少、技术要求低、时间要求少的运动方式,也可以起到锻炼的效果,较适合夏天。
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