If you have weak shoulders, even the most basic exercises could disable you. Researchers found that 14 percent of shoulder injuries occurred while people were doing push ups and pull ups. “This is most likely the result of poor shoulder stability,” says
Peter Ketch, CSCS. To protect your shoulders, try this routine once a week – at the end of your workout, do two or three sets of pushups with your hands on a Swiss ball. “This helps strengthen and stabilise your shoulder joints,” says Ketch. Do 15 reps per set.