研究证明节食或运动减肥都有益于心脏恢复年轻

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Weight loss by diet or exercise benefits heart

NEW YORK (Reuters Health) - Shedding excess pounds may restore some of the heart's youth, whether the weight loss comes from eating less or exercising more, the results of a small study suggests.
一项小研究显示，无论用节食还是运动的方法减肥，都能够使心脏恢复年轻。

Researchers found that among 25 healthy but overweight middle-aged adults, moderate weight loss appeared to restore some the heart's youthful elasticity -- making it easier for the heart to relax between contractions and refill with blood.
研究者发现，在25名超重但是健康的中年人群中，适当的减轻体重，能使心脏年轻----令心脏在收缩和舒张期更松弛。

It did not appear to matter whether the weight loss was achieved through diet changes or exercise, the researchers report in the American Journal of Physiology.
研究者在美国生理学期刊上发表说，这一现象与减肥的方式无关，无论是用节食还是运动的方式减肥。

\"If individuals want to do something that's good for their heart, then my message to them is lose weight by the method they find most tolerable,\" Dr. Sandor J. Kovacs, the senior researcher on the study, said in a statement.
该项研究的高级研究员Dr. Sandor J. Kovacs说：“如果你想保护心脏，那么我的建议就是，用节食或者运动的方式减肥是最有益的方法。”

\"They're virtually guaranteed that it will have a salutary effect on their cardiovascular system,\" said Kovacs, a professor of medicine at Washington University School of Medicine in St. Louis, Missouri.
华盛顿大学医学教授Kovacs说：“这可以保证其对心血管系统有有益的影响。”

As people age, their body tissue accumulates collagen fibers, which causes tissue -- including heart muscle and arteries -- to become more stiff. So over time, the heart starts to take a bit longer to relax between contractions and fill back up with blood.
随着年龄的增长，人体内胶原纤维不断积累，胶原纤维能导致人体组织包括心肌和动脉硬化。因此，随着时间的推移，心脏在收缩和舒张期之间放松所需要的时间越来越长。

Excess weight, obesity in particular, has been shown to affect the heart's elasticity as well. But while studies suggest that weight loss achieved by diet and exercise improves cardiac function, it hasn't been clear if the same is true if weight loss is accomplished using just one of these strategies.
研究显示，肥胖对于心脏的弹性有影响。用节食和运动的方法减肥对心脏的功能有改善，但并不能确定仅使用其中一种方式减肥是否对心脏有益。

So Kovacs and his colleagues looked at weight loss and heart function in 25 men and women who were overweight, but not obese. For one year, half of the participants cut their daily calories by about 12 percent, while the rest took up an exercise routine -- doing activities like walking, running or cycling six days per week.
因此，Kovacs和他的同事在25名略微超重但并不肥胖的男性和女性中，研究减肥和心功能的相关性。大约1年的时间，有1半的参与者坚持每天减少12％卡路里摄入量，其余另一半开始运动减肥――每周六天，散步、跑步或者骑车。

The exercisers did not make diet changes, but burned roughly the same percentage of calories as the diet group cut from their food intake.
运动组不节食，但消耗的卡路里跟节食组少摄入的卡路里量相同。

According to Kovacs, one challenge to getting people to lose weight is that the potential consequences of being overweight -- including diabetes, high blood pressure and heart disease -- are often far off in the future.
根据Kovacs的研究，让这些人减肥的一项挑战是在不久的将来，他们很可能会反弹变肥胖――增加了患糖尿病、高血压和心脏病的可能性。

\"But now we can tell them, lose weight and right away you can have better cardiovascular health,\" he said.
但是，现在，我们可以肯定，用正确的方法减肥对心血管系统的健康有益。