Daiwa Felicity Compact Core Trainer Ab Workout Equipment for Leg Thighs Buttocks Calves Rodeo Core Exerciser Horse Exercise Machine Reshapes the back, waist, stomach, and thighs by engaging core and upper leg muscles. Three height variations to suit individual figures. Energy-saving design: uses body weight and motion, no electricity required! Compact and lightweight, its easy to carry but stays sturdy. Reversible: forward and backward motion.