The benefits of fitness cycling can strengthen cardiorespiratory function, lose weight efficiently, prevent cardiovascular and cerebrovascular diseases, and release stress. The disadvantages are damage to the knees, affect the pelvis, panic and chest tightness. 1. Benefits (1) strengthen cardiorespiratory function: due to switching back and forth at different intensities, the heart rate is also changing, appropriate training, can strengthen cardiorespiratory function. (2) Efficient weight loss: fitness cycling is a high-intensity, cycling for 1 hour can consume about 550 calories of energy, there is a good effect of weight loss. (3) prevention of cardiovascular disease: fitness cycling is an aerobic exercise, can speed up the metabolism, increase the elasticity of blood vessels, which can prevent cardiovascular disease. (4) Release pressure: the body will secrete dopamine when riding, which excites the nerves, can release pressure, make the mood happy. 2. The bad side: when the posture is not right or long time excessive riding fitness bicycle, the following bad side may occur. (1) damage to the knee: fitness bicycle on the knee damage is relatively large, especially over a long period of time will be aggravated by fast pedal riding. (2) affect the pelvis: fitness bicycle will make the pelvis pressure, the human body pelvic area has a negative impact, reduce sexual function and libido. (3) Panic and chest tightness: If the training intensity is too large, it is easy to panic and chest tightness and so on. Fitness cycling can be reasonable under the guidance of professional physicians.