Designed to engage the lower body muscles - hip flexors, quadriceps, and abdominals - in fun yet challenging workouts. Two Slastix® attach to an anchor (another person or stationary object) on one end and two thigh blaster straps,which are fastened just above the knee on the other. As an athlete elevates the knee, the resistance forces the hip flexors, quadriceps, and abdominals to engage. Athletes can train in place by anchoring the Slastix® to a fixed object, or they can train in motion (on a field or court) by having a partner hold the anchor and jog behind the athlete,which creates resistance while he or she back pedals or performs sprints or footwork drills. Includes two thigh straps, two 4-foot Slastix® and one anchor.