Helps teenagers grow taller - regular leg exercises can promote bone growth.Improves agility - it includes two aspects: first, physical flexibility and second,reflexive regulation of the nervous system.Treatment of humpbacked and myopia— Riding on a unicycle requires an upright back,and riding a unicycle often can prevent humpbacked and myopia.The development of intelligence - unicycle exercise is called "educational exercise"by the medical community. Because the unicycle exercise is need very balance-ridden,it makes cerebellar activity even more powerful, which in turn drives braindevelopment.Control obesity and maintain good body shape. The action of riding makes the lower limbs get exercised, and the proportion of the body will make the lower limbs more slender. Stick to riding a unicycle to lose weight.Specification:Name: Single wheel bicycleSize: 16/18/20/24inchesMaterial: steelMaximum load capacity: 150kgFrame structure: the whole car16 inches: outer box size: 38.5*18.5*42.0cm, gross weight: 5.5kg18 inches: outer box size: 43.5*18.5*45.5cm, gross weight: 6.0kg20 inches: outer box size: 48.5*18.5*50.0cm, gross weight: 6.2kg24 inches: outer box size: 58.0*18.5*60.0cm, gross weight: 6.5kg