The calves are thicker than the thighs, it may be that the calves are not stretched or the calves are not exercised properly during the workout, or it may be a factor of your own body itself. You can do calf muscle training. You can practice squatting, so that the leg muscles tighten, and adhere to the exercise every day to be able to thin calves, but also every day to aerobics, rope skipping, jogging and yoga and other exercises, adhere to an hour a day, long-term down can play a role in thin calves. Diet to maintain adequate nutrition, eat more fresh vegetables and fruits, but not excess nutrition.