The primary source of energy for the body is carbohydrates, which are broken down into glucose and utilized for immediate energy needs during physical activity. In situations where carbohydrate stores are low, the body can also use fats and proteins as alternative energy sources. However, carbohydrates remain crucial for optimal performance, particularly in high-intensity exercises. A well-balanced diet including adequate carbohydrates supports endurance and recovery, making it vital for anyone engaged in regular physical activity.