Assessment and Qualifications Alliance (AQA) GCSE PE Paper 2 Practice

Body composition can be accurately assessed using various methods, specifically skinfold measurements, bioelectrical impedance, or DEXA (Dual-Energy X-ray Absorptiometry) methods.

Skinfold measurements involve pinching the skin and measuring the thickness of the folds at specific sites on the body to estimate body fat percentage. This method is commonly used due to its simplicity and relatively low cost, but it requires proper technique to ensure accuracy.

Bioelectrical impedance analysis (BIA) measures the resistance of electrical flow through the body. Since fat tissue contains less water compared to lean tissue, the resistance can give insights into the relative proportions of fat and lean body mass.

The DEXA scan is a more advanced technology that provides a comprehensive analysis of body composition, including bone density, fat mass, and lean mass. It is considered one of the most accurate methods for assessing body composition.

In contrast, measuring height and weight alone provides a limited view of body composition, as it does not distinguish between muscle and fat. Evaluating dietary habits and tracking calories focuses on nutrition rather than physical composition. Assessing mental resilience and endurance pertains to psychological and physiological performance attributes rather than the actual composition of the body.