Cycling is a low-impact exercise that causes less strain and injuries than other forms of exercise. It varies in intensity, making it suitable for people of all ages, from young children to older adults. People ride bicycles as a form of transport, recreation, and sport. It can be done on stationary bikes in gyms or using an outdoor bicycle. The benefits of cycling are many, including increased muscle tone, increased stamina and aerobic fitness, better lung and heart health, improved flexibility and joint mobility, decreased stress levels, improved posture and coordination, strengthened bones, decreased body fat levels, lower cholesterol levels, and may also reduce anxiety and depression. Cycling can help protect from diseases such as stroke, heart attack, some cancers, diabetes, obesity and arthritis. Cycling is predominantly a lower body of exercise, so it primarily benefits the gluteus muscles in the buttocks, the quadriceps in the thighs, and the gastrocnemius and soleus muscles in the calves, the hamstrings in the back of the thighs and the flexor muscles in the front of the hips. When cycling, it’s important to choose an appropriate seat height to protect the lower back, wear a helmet for head protection and wear correct cycling clothes. Cycling clothes are made of high-tech fibers that wick away moisture, are usually neon-colored, with reflective material to promote visibility to drivers, and the bike shorts have a thick pad or chamois to prevent chafing and provide cushioning. There are many types of cycling: road cycling; track cycling; para-cycling; mountain biking; cross-country mountain biking; downhill mountain biking; bicycle motocross (BMX); ice track cycling; freestyle BMX; unicycling; artistic cycling; bicycle polo; and snow-biking.