**How can interval training improve overall fitness levels?**
Interval training involves alternating short bursts of intense activity with periods of rest or lower intensity. This method enhances overall fitness levels by improving cardiovascular endurance and metabolic function more effectively than steady-state exercise. Interval training can increase calorie burn, promote fat loss, and build muscle in a shorter amount of time. It also helps improve anaerobic capacity, allowing the body to recover quicker during physical exertion. Incorporating intervals into workouts can bring variety and boost motivation in exercise routines.