He stressed that any one person's fitness levels depend on a complex mix of factors, including genetics, exercise habits, body composition and overall health.
他强调道，任何一个人的健康水平取决于多方面因素的影响，包括遗传、锻炼习惯、身体成分及整体健康状况。
Physical exercise is a somewhat grayer area than sleep when it comes to memory, but there seems to be a reasonable body of evidence suggesting that physical fitness and cognitive fitness are linked.
就记忆而言，相较于睡眠，体育锻炼是个灰色地带，但似乎有大量的有力的证据证明匀称的体态和良好的认识能力是有联系的。
Although the amount of exercise appears small, the benefits were clear in improving physical fitness and reducing body fat and blood pressure.
尽管运动量看起来很小，但对于增强体质、减少身体脂肪和降血压却有明显效果。
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