Hoon Lee, study author, from the Harvard TH Chan School of Public Health, in Boston, added: “The potential impact of physical activity on health is great, yet it remains unclear whether engaging in high levels of prolonged, vigorous or moderate intensity physical activity above the recommended levels provides any additional benefits or harmful effects on cardiovascular health.”
该研究论文作者、波士顿哈佛陈曾熙公共卫生学院的李勋（音译）表示：“体育运动对健康的潜在影响很大，但目前尚不清楚长时间、剧烈或中等强度的体育活动是否会对心血管健康产生额外的益处或害处。”
Previous research had claimed that doing too much exercise could be harmful and may actually increase a person’s risk of an early death by putting added strain on their organs.
此前的研究表明，运动过量可能有害，并可能因增加器官负担而增大过早死亡的风险。
But the new study finds that to be untrue, as even people doing more than five hours a week of intense activity showed no adverse health effects.
但这项新的研究发现，这种说法不成立，因为即使人们每周进行五个小时以上的剧烈活动，也不会对健康产生不利影响。
"This finding may reduce the concerns around the potential harmful effect of engaging in high levels of physical activity observed in several previous studies," noted Mr Lee.
李勋指出：“这一发现可能会减少人们对先前几项研究中观察到的高强度体力活动的潜在有害影响的担忧。”
"Our study provides evidence to guide inpiduals to choose the right amount and intensity of physical activity over their lifetime to maintain their overall health.”
“我们的研究提供了依据，人们可以据此选择适当的运动量和强度，以保持健康。”
