What method is commonly used to assess body composition?

Skinfold measurements are a widely recognized method for assessing body composition. This technique involves using calipers to measure the thickness of skinfolds at various sites on the body. These measurements are used to estimate subcutaneous fat levels, which can indicate overall body fat percentage.

The reason skinfold measurements are favored is that they offer a relatively quick, cost-effective, and non-invasive method to estimate body fat. When performed correctly, they can provide a good approximation of an individual's body fat distribution and overall composition, which is critical for developing tailored fitness and nutrition plans.

In contrast, the other methods listed do not effectively assess body composition directly. The push-up test measures muscular endurance, the arm curl assesses strength in the upper body, and the aerobic capacity test evaluates cardiovascular fitness. While these assessments are valuable for gaining insights into physical fitness levels, they do not provide specific information about body fat percentage or overall body composition.