Apparently there is some 5 pack abs app for the IPhone that my ex uses. He has our seven year old son doing the exercises every morning and evening. My son is hypermobile and has a series of pilates type exercises we need to do with his daily, but my ex is adding this 6 pack workout to the routine as he does them himself. My son is a little skinny thing. Is it ok for him to be doing the same workout as a grownup? He's at his dad's half the week, so he's doing it twice a day veery day he's there, so about 7 5 pack workout sessions a week! He doesn't need a six pack; he's only seven. Is it ok for him to be doing this?