<s>[INST] dear doctor every time i go to a course and we use the trampoline i have abdominal pain sometimes on the right side n sometimes on the left side. but they are so painful that i have to stop using the trampoline, then again some cramps may occur even if am not exercising. pls help me am getting worried about it. thank you [/INST] Hi and welcome to hcmtrampolines cause shaking effect on intraabdominal organs so this is not unusual that stomach hurts after it. you should simply stop using itWIsh you good health. Regards </s>