Walking at comfortable speed improves the efficiency of the cardiorespiratory system by stimulating the lungs and heart, but at a more gradual rate than most other forms of exercise.
在舒适的步行速度提高了效率，心肺系统的刺激肺及心脏，但更逐步率比大多数其他形式的活动。
Walking at comfortable speed improves the efficiency of the cardiorespiratory system by stimulating the lungs and heart, but at a more gradual rate than most other forms of exercise.
在舒适的步行速度提高了效率，心肺系统的刺激肺及心脏，但更逐步率比大多数其他形式的活动。
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