Question

explain why improving cardiorespiratory fitness and muscular strength and endurance are considered good strategies for improving body composition.

Explanation:

1. Cardiorespiratory fitness (e.g., running, cycling) increases calorie burn during exercise and at rest (due to improved metabolism). This helps reduce fat mass as the body uses stored fat for energy.
2. Muscular strength/endurance training (e.g., weightlifting, bodyweight exercises) builds muscle mass. Muscle tissue has a higher metabolic rate than fat, so more muscle increases resting energy expenditure, further aiding fat loss and promoting a leaner body composition (higher muscle-to-fat ratio).
3. Combined, cardio burns calories/fat, and strength training builds muscle, both contributing to a healthier body composition (less fat, more muscle, improved overall fitness).

Answer:

Improving cardiorespiratory fitness burns calories (reducing fat) via increased energy expenditure during/after exercise. Muscular strength/endurance training builds muscle, which has a higher metabolic rate (boosting resting calorie burn) and increases muscle - to - fat ratio. Together, they reduce fat mass and increase lean muscle mass, improving body composition.