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美国巴尔的摩约翰斯——霍普金斯医院的医生们于去年12月5日宣称:与流行看法相反,单只年老并不减低人体心脏泵送血液的能力,亦不能限制老年人激烈运动。最近在这里对60岁以上无心脏病史者进行调查表明,在激烈运动过程中,虽然老年人心脏比年轻人心脏跳动慢,但却比年轻人心脏扩张得更大,增加每搏输出置,作为泵送速度比较慢的补偿。其结果是,老年人心脏和青年人的一样,都泵送大致相同的血量。对比试验在81名志愿者身上进行,其中约半数
On December 5 last year, doctors at the Johns Hopkins Hospital in Baltimore declared that, contrary to popular belief, being elderly alone does not diminish the ability of the human heart to pump blood nor limit the vigorous exercise of the elderly. A recent survey of people over the age of 60 with no history of heart disease showed that during intense exercise, the elderly dilated their hearts more than the young ones and increased their stroke-to-stroke output, although their hearts beat slower than young ones Pumping speed is slower compensation. As a result, older adults, like their young counterparts, pump roughly the same amount of blood. The comparative test was conducted on 81 volunteers, about half of them