National Academy of Sports Medicine (NASM) Group Fitness Instructor Practice Exam

The correct choice highlights the specific benefit of exercise that directly relates to bone strength and the prevention of bone loss. Engaging in weight-bearing and resistance exercises can stimulate bone formation and improve bone density, which is crucial for skeletal health, especially as individuals age. Increased bone density helps in reducing the risk of osteoporosis and fractures, making it a vital aspect of maintaining overall physical health.

In contrast, improved muscle tone focuses on the enhancement of muscle appearance and strength, which, while beneficial, does not specifically address bone health. Increased cardiovascular capacity pertains to the efficiency of the heart and lungs during physical activity, indicating how well prepared the body is for aerobic exercises but again, does not concern bone strength. Enhanced flexibility involves the range of motion in joints and muscles, promoting mobility but not directly influencing bone density. Therefore, the focus on increased bone density accurately captures the essential role exercise plays in bolstering bone health and preventing deterioration over time.