When doing aerobics, the bones of the calf are a little painful, which may be related to irregular movements and lack of exercise, and has little to do with bone calcium. If you sweat a lot during aerobic exercise, the sweat will take away some calcium, so it's no harm to make up for it. Take enough calcium in your life, and eat more calcium-rich foods such as milk, bean products, shrimp, kelp, fish, bone soup and green leafy vegetables. (yuan _t)