One study of 4800 people by the American College of Chest Physicians found that lung function peaks (at about 20% higher) during this period, with midday exercise returning the lowest lung function.

美国胸科医师学会对4800人进行的一项研究表明，肺功能在这段时间内达到顶峰(比平常高出20%)，而在中午的时候运动，肺功能则处在最低水平。

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Function: Exercise the upper arms, chest, back and the abdomen muscle strength.

能：锻炼上臂、胸、背、腹部肌肉力量。

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ConcluSion: lung volumes, the ability of oxygen uptake and chest wall and lung compliance decrease with rapid and shallow breathing Patterns in morbidly obese individuals during exercise.

结论：重度肥胖可使肺容量减少、运动中的组织供氧能力及胸壁顺应性、肺顺应性下降，呈现浅快呼吸模式。

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They said they will encourage him to focus on aerobics for the next few weeks and not engage in vigorous upper-body exercise until his chest area around the device has healed.

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Dr. GERBER: You're probably going to want to make that investment in a patient that truly has something to gain, and those would be the patients who already have signs or symptoms of heart (unintelligible) disease: Such as chest pain, or shortness of breath or exercise intolerance.

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In heart disease studies, for example, subjective outcomes might include the duration and severity of chest pain, shortness of breath, or ability to exercise without pain.

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