Cycling and bone density

Cycling is great for your heart, lungs, and leg muscles, but it's a non-weight-bearing, low-impact activity. You sit on a saddle while the bike supports your body weight, so your bones don't get the jarring, gravity-based forces that come from walking, running, or jumping. Bone responds to mechanical loading, and without that kind of impact, cycling tends to offer little direct stimulus to build or maintain bone density.

Studies of long-time competitive cyclists have often found lower bone density at the hip and spine compared to athletes in weight-bearing sports, likely because cycling doesn't load bone the same way. This doesn't mean cycling causes osteoporosis on its own, but relying on it as your only form of exercise may leave bones under-stimulated, especially as you also lose bone with age.

If cycling is a favorite activity, you don't need to give it up. Many people pair it with weight-bearing or resistance exercises, like walking, strength training, or activities with some impact, to give bones a more complete workout. A doctor or physical therapist can help you think through a balanced routine, and a DEXA scan can show where your bone density actually stands.