ritfit weighted medicine ball - non-slip rubber shell & dual texture grip - workout exercise ball for core strength, balance training, coordination fitness - multiple weights & colors ritfit ritfit medicine ball is an excellent way to work every part of your body, including your abs, hips, and thighs. using a ball, whether you're doing crunches, push-ups, or using it as a weight bench, targets your abs, back, and stabilizer muscles for a more dynamic workout.