A training device includes a continuous elastic loop having attached thereon at least one of a hand grip or a foot cradle, a non-scissoring sleeve slidably wrapped around a first portion of the continuous elastic loop, and an anchoring portion non-slidably connected to the non-scissoring sleeve. The elastic loop provides uniform resistance (i.e., tension) while providing total body muscle engagement whether conducting isometric, concentric, or eccentric muscle contractions. The training device provides portability, ease of use and greater effectiveness for the user while exercising.