Body composition is typically assessed using methods such as BMI (Body Mass Index), skinfold measurements, or more advanced techniques like DEXA scans. These assessments provide insights into the proportions of fat and lean mass in the body. A healthy body composition indicates an appropriate balance of fat and muscle, while excess body fat can signal risk for conditions like heart disease, diabetes, and other health issues. Monitoring body composition helps to tailor fitness and nutrition plans to meet individual goals related to health and performance.