Which of the following is a benefit of improved levels of cardiorespiratory fitness?

Improved levels of cardiorespiratory fitness lead to better oxygen utilization, which is a critical benefit of enhanced physical condition. When a person is more physically fit, their body becomes more efficient at delivering oxygen to the muscles during physical activity. This efficiency means that the heart can pump more oxygen-rich blood to the working muscles while requiring less effort, which can result in a lower resting heart rate over time.

Higher oxygen utilization also aids in prolonged physical activity, enhancing endurance and reducing fatigue during exercise sessions. This allows individuals to engage in activities longer without feeling as tired, ultimately supporting improved performance.

In this context, body fat reduction, lower resting heart rates, and increased stamina are all factors that can be positively influenced by improved cardiorespiratory fitness. However, the most direct benefit outlined in your choices is the enhanced ability to use oxygen efficiently, which is critical for overall health and performance in physical activities.