... is worn out by hard study or on-line game. D.Good for loosing weight (by reducing fatty deposit, waistline, buttocks, calf ... Skyrunner to become physically and mentally fit and balanced again! D.Good for loosing weight (by reducing fatty deposit, waistline, buttocks, calf ... strides of up to 9 feet in length. Skyrunner are for the average athletically-inclined person and the professional circus performer ...