Abstract: A leg muscle training device comprises an elongated elastomeric and stretchable tether, a set of leg bindings secured to each end of the tether, and a position adjustable attachment means connected to the tether. Each set of leg bindings includes a thigh binding and a calf binding. The attachment means is designed to provide stationary resistance for the device to provide resistance for the runner moving away from the stationary resistance. The attachment means is preferably a position adjustable loop, and the means for providing stationary resistance is to have a person, such as the trainer, position the loop over the forearm and grasp the lengths of the tether firmly while the runner is moving or exerting motion away, as by running on a treadmill or in place. A method for strengthening and training a runner comprises securing the leg bindings of the device of this invention to both legs of a runner and securing the attachment means of the device to a stationary point of attachment.