Which method can be used to assess physical fitness?

The method of performing a maximal exercise test to evaluate aerobic capacity is a direct and reliable way to assess physical fitness. This test typically involves an individual exercising at increasing intensity levels until they reach their maximum effort. This not only measures the efficiency of the cardiovascular and respiratory systems during intense physical activity but also provides valuable insight into an individual's overall aerobic fitness level.

In contrast, measuring body weight and calculating BMI are indirect indicators that do not provide a comprehensive assessment of physical fitness. While they can offer some insights into body composition, they do not directly evaluate cardiovascular endurance, muscular strength, or flexibility, which are critical components of overall physical fitness.

Monitoring daily step count is useful for tracking daily physical activity levels, but it does not provide a complete picture of an individual's fitness in terms of maximum aerobic capacity or other fitness components. Thus, the maximal exercise test stands out as the most effective method for thoroughly assessing physical fitness.