Monitoring saturation levels with a pulse oximeter illustrates a key relationship between pulse rate and cardiovascular stress. When oxygen saturation is stable at high levels, such as 99%, a decreasing pulse rate—from 59 to 53—indicates reduced cardiac loading. This reduction in pulse signifies that the body is efficiently delivering oxygen to cells without excess strain on the cardiovascular system. For athletes, this phenomenon acts like a built-in benefit, enabling optimal performance by alleviating stress on the heart while maintaining effective oxygen transportation.

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