Isoped exercise device

A method to exercise comprising applying an external force to an endless belt of an exercise device in an amount sufficient to overcome a frictional force provided by the exercise device opposed to the applied force, wherein the exercise device comprises a base frame comprising a plurality of belt members attached to, and arranged in parallel on the base frame, wherein each of the belt members comprises:

• a front axle attached to the base frame oriented along a front central axis separated by a distance from a rear axle attached to the base frame having a rear central axis, wherein the front central axis is essentially parallel to the rear central axis;
• a front roller disposed around the front axle and arranged to rotate around the front central axis;
• a rear roller disposed around the rear axle and arranged to rotate around the rear central axis;
• the endless belt having an infinite number of sides disposed around and in contact with a portion of the front roller and a portion of the rear roller, the endless belt having a major axis oriented perpendicular to the front central axis and a minor axis oriented parallel to the front central axis;
• the exercise device further comprising at least one frictional member disposed in frictional contact with, and forcibly biased against a surface of at least one front roller, rear roller, or a combination thereof such that the external force directed perpendicular to the front central axis applied to at least one of the endless belts is opposed by the frictional force provided by the frictional contact between the frictional member and the at least one surface of the front roller, the rear roller, or a combination thereof;
• the frictional member comprises a first end attached to the base frame, and a second end movably engaged with the first end, and a resilient member disposed between, and in mechanical contact with the first end and the second end, wherein the second end further comprises a follower arranged in frictional contact with the surface of the front roller, the rear roller, or a combination thereof, wherein the resilient member is dimensioned and arranged between the first end and the second end such that the follower is forcibly biased against the surface of the front roller, the rear roller, or a combination thereof, to provide the fictional force.