For someone like Miguel wanting to increase his endurance, which exercise should he focus on?

Focusing on aerobic exercises is the best choice for someone like Miguel who aims to increase his endurance. Aerobic activities enhance the body's ability to utilize oxygen efficiently during prolonged physical activity, which is essential for building endurance. These exercises, such as running, cycling, swimming, and rowing, promote cardiovascular fitness, improve lung capacity, and increase stamina over time. By engaging in aerobic activities consistently, Miguel will develop a greater endurance level, allowing him to sustain activity for longer periods.

In contrast, flexibility exercises primarily improve the range of motion in joints, strength training focuses on building muscle mass and strength, and balance exercises are aimed at enhancing stability and coordination. While all types of exercise contribute to overall fitness and health, only aerobic activities specifically target endurance enhancement.