英语翻译In the past decade or so,various studies involving thous

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英语翻译
In the past decade or so,various studies involving thousands of participants have shown that workouts lower the risk of heart disease."Exercise has a favorable effect on virtually all risk factors of cardiovascular disease," says Jonathan Meyers,a health research scientist at the Palo Alto Veterans Affairs Health System in California.The reason,he says:when a person exercises,the heart muscle contracts forcefully and frequently,increasing blood flow through the arteries.This leads to subtle changes in the autonomic nervous system,which controls the contraction and relaxation of these vessels.This fine-tuning leads to a lower resting heart rate (fewer beats to pump blood through the body),lower blood pressure and a more variable heart rate,all factors that lower the risk of developing cardiovascular disease,he says.

在过去的十多年来,不同的研究学者均表明数以千计参与运动的人见证了通过运动降低患有心脏病危险几率的事实.乔纳森-梅耶斯说：“运动几乎对所有的心血管疾病都有良好的治疗效果”,而他是一名加利福尼亚帕洛阿尔托退伍军人医疗系统事务部的健康研究员.他这样说的依据是：当人在运动的时候,心脏肌肉得到频繁有力地收缩,增大动脉的血流量.他还说,这会导致控制血管收缩和放松的自主神经系统产生微妙变化.这个微妙调整产生了较低的静息心率（到全身的泵血量就更少）,降低血压和减少心率不齐,心血管疾病恶化的所有因素也都会随之降低.

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