Top 7 Tips To Stretch Your Back, Hip And Leg Flexibility How much time should you spend stretching ? This is up to you. To do all the repetitions of all exercises in the following would take at least 30 minutes. It is encouraged to try all the stretches and then decide what works best for you. You may choose to do only a few exercises that seem most helpful for your back condition. Or you may decide to do fewer repetitions of each exercise . Or you may do everything. You are the best person to decide what works for you. The exercises do not all have to be done at once. You can do a little here and there over the course of your day. Here are some of the tips that you can consider to adopt. 1. Trunk Rotation Lie on your back with your arms out to your sides. Bend your knees and either place your feet flat on the floor or pull your knees up toward your chest. Roll your legs to one side and then the other. Experiment with leg positions to find the one that is most comfortable for ...