Sure, stovepipe. This is because 70% of the muscles in the whole body are concentrated in the lower body. This is why some girls can do squats even if they can't do push-ups. It's not easy for butterfly sleeve to lose his arms, but it's much easier to get rid of the fat in his lower body than to lose his upper body. Riding a bike can thin your legs. But there are so many ways to lose weight, why choose cycling? What are its advantages? First of all, riding a bike can improve muscle strength.