A deckless treadmill system comprising a cogged-belt in combination with elongated and complementary cogged drive rollers and a series of aligned and cooperatively interactive cogged support rollers disposed proximate to and in cooperative engagement with the peripheral underside edges of the cogged belt. Accordingly, the structural configuration and mechanical componentry of the present invention effectively functions to significantly reduce slip between the elongated cogged drive rollers and the cogged belt, and to further provide the requisite support for the opposing peripheral edges of the cogged belt; thereby, providing a truly deckless treadmill system and overall stable running platform with improved shock absorption and dispersion characteristics. The cogged belt of the present invention is preferably of integral formation or construction and, as such, avoids the structural and mechanical disadvantages and maintenance requirements associated with multilayer or multi-component construction of conventional tread lamellae-and-belt arrangements.
