No, don't choose a hula hoop that is too heavy. It's bad for your lumbar spine and knees. Hula hoop is helpful for slimming, but it is best to shake it in each direction for no more than fifteen minutes, such as shaking it from left to right for seven minutes every day and from right to left for seven minutes, 2-3 times a month. You will see the effect. After eating, rest for at least half an hour before shaking. Do you have a stomachache? (∩ _ ∩) o