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BUILT TO ENDURE THE TOUGHEST SLAMS: With a thick outer shell that absorbs multiple impacts, slamming or throwing this handheld ball against walls or the ground forces you to utilize more energy and force, resulting in more calorie burning and endurance
EXPAND AND INTENSIFY YOUR WORKOUT PROGRAM: Using these weighted workout balls in place of dumbbells or kettlebells can improve your training significantly and burn more calories by adding extra weight to your sit ups, push ups, squats, and plyo jumps