Disclosed herein is an exercise device comprising a plurality of belt members attached to, and arranged in parallel on a base frame, the exercise device further comprising at least one frictional member disposed in frictional contact with, and forcibly biased against a surface of at least roller in communication with the belt such that an external force applied to at least one of the belts is opposed by a frictional force provided by the frictional contact between the frictional member and the roller. A method of exercising using the exercise device is also disclosed.