Using no electricity, this is the Compact Core Exerciser trainer that simulates cantering on a horse to strengthen and tone the core muscles. Exercisers sit on the padded saddle, rest their feet on a rubberized bar, and shift their weight backward to put the device’s drivewheel in motion. As the saddle rotates at a moderate 40 rpm or less, it requires the rider to engage lumbar muscles, abs, glutes, and thighs, building core strength to help prevent back injuries and improve balance and posture.