Interval training can boost cardiovascular fitness by alternating periods of high-intensity exercise with recovery bouts. This method allows individuals to push their limits and engage in more intense efforts than they could sustain continuously. Research shows that interval training enhances both aerobic and anaerobic capacities, improving overall heart health and stamina. The variability in intensity keeps workouts engaging and can drive greater calorie expenditure. Incorporating intervals into fitness routines allows for more efficient training and significant improvements in cardiovascular conditioning over time.