The uncomplicated UltraFlex Fitness is a great addition to any exercise program. It features no weights, pulleys, bells or whistles – just a long, flexible, stick with comfortable wrist loops and handgrips. Simply hold each end and bend them together -- simple, but not so easy! Your muscles get a workout while bending the UltraFlex and controlling the return movement. UltraFlex for men is designed to strengthen and bulk up muscles, with heavier resistance and fewer reps. Because women generally prefer toned muscles without bulk, the women's UltraFlex is shorter and lighter and requires more repetitions.