Core sessions gain instability training with this 23 inch half exercise ball, whose wavy-textured dome and 660 lbs capacity anchor squats, push-ups, and balance drills. Two detachable resistance bands extend workouts to arms and shoulders, while the Pvc, Pp, and Tpe construction keeps the 24.4 x 8.5 inch platform firm underfoot. The included foot pump inflates the trainer quickly for home gym strength, rehabilitation, and full body routines.