Abstract: An exercise device comprising a stretchable elongated element comprising a pair of coaxial stretchable elongated elements, including an inner stretchable elongated element and an outer stretchable elongated element. The outer stretchable elongated element comprising a stretchable elongated tube having a length and defining a channel extending substantially along the entire length of the stretchable elongated tube. The inner stretchable elongated element is received by the channel and extends substantially along the entire length of the stretchable elongated tube The inner stretchable elongated element may also comprise a stretchable elongated tube. The outer stretchable elongated element and the inner stretchable elongated element may have different tensile strengths and may have different moduli of elasticity.

Abstract: An adjustable exercise device that includes one or more inclined riser blocks for readily elevating and inclining a platform to enable stepping and other exercises to be readily performed on an inclined platform. The inclined riser blocks may be matingly engageable with the bottom of the platform to elevate and incline the platform. The inclined riser block may include a top face matingly engageable with the bottom of the platform, a bottom face, and a central portion extending between the bottom and top faces and having a front and rear, the central portion increasing in thickness from the front to the rear. The top face extends at an incline.

Abstract: An adjustable exercise device that includes one or more inclined riser blocks for readily elevating and inclining a platform to enable stepping and other exercises to be readily performed on an inclined platform. The inclined riser blocks may be matingly engageable with the bottom of the platform to elevate and incline the platform. The inclined riser block may include a top face matingly engageable with the bottom of the platform, a bottom face, and a central portion extending between the bottom and top faces and having a front and rear, the central portion increasing in thickness from the front to the rear. The top face extends at an incline.