Bow legs cannot be entirely corrected if the bone itself is curved. If your legs only have the appearance of being bowed, this condition can be overcome by practicing the following exercise: stand erect with arms in front of you. Rise high on the toes; then slowly lower the body until it rests upon the heels. Then come up and back into position. In addition to this exercise, plain rising on toes and walking across the room, then back to position, and also rope skipping, are very effective in your case.