The best way to increase cardiovascular endurance is through regular aerobic exercise, such as running, cycling, or swimming. Gradually increasing the duration and intensity of these workouts helps improve heart and lung efficiency, enhancing overall physical stamina. Incorporating interval training, which alternates between high and low-intensity efforts, can also be effective in maximizing endurance gains. Consistency is key—establishing a regular workout routine incorporates variations to prevent plateaus and keep motivation high.