Turn push-up day into a full-body balance challenge with this half exercise ball trainer. Its dome shape and roughly 24.4 by 8.5-inch footprint create an unstable surface that engages your core during stepping drills, planks, lunges, and push-ups, useful for strength building and post-injury balance recovery. The ball is built from anti-burst PVC, while the PP and TPE base adds a non-slip, wear-resistant bottom with six anti-skid feet so it stays put on hard floors. It holds up to 660 pounds, and two detachable resistance ropes with padded foam handles clip onto the base, letting you work arms and shoulders once lower-body moves feel too easy. A foot pump ships with the trainer: connect it, step on the pedal, and the ball fills with air in about a minute, deflating just as fast. At 10.1 pounds, the blue trainer is easy to carry room to room and tuck away after each workout.