Cycling, whether at a relaxed pace or at high speeds, is an enjoyable activity with many general fitness and cross-training benefits. Cycling increases aerobic and cardiorespiratory capacity and endurance. It also builds muscular endurance and strength in the lower body. In addition, cycling is often used as a method of relaxation and tension reduction. Cycling is an ideal activity for those desiring moderate to low intensity workouts of longer durations. It can also be adapted as a high-intensity, short duration activity, and for interval training. It is recommended that cyclists wear a cycling helmet for protection.