Improve strength, stability of the trunk and leg strength, exercise capacity, such as a balance adjustment. The board of wide width that can be easily balanced. Indoors is available regardless of the field. · "Free Style" difference between "professional" and "free-style" total length of about 60 centimeters to 120 centimeters tall easy to handle, even for children. The tall rider easier to use, "pro" is the total length of about 71 centimeters little longer. There is no weight limit to either board.