Which of the following is a known benefit of cardiorespiratory training?

One significant benefit of cardiorespiratory training is its positive effect on sleep quality. Engaging in regular aerobic exercise helps to regulate the sleep cycle, leading to deeper and more restorative sleep. This improvement can be attributed to various factors, including the reduction of anxiety and stress levels associated with regular cardiovascular activity, as well as the body's increased ability to utilize oxygen, which can enhance overall energy levels throughout the day.

While increasing muscle mass, enhancing flexibility, and boosting anaerobic capacity are important aspects of physical fitness, these outcomes are typically more associated with strength training, flexibility work, and high-intensity training, respectively. Cardiorespiratory training primarily targets the efficiency of the heart and lungs, leading to better oxygen delivery and utilization, rather than directly influencing muscle mass or flexibility. Thus, the enhancement of sleep quality stands out as a key benefit specifically linked to regular cardiorespiratory exercise.