These are natural pain suppressors and mood elevators. So if you experience pain during exercise, your injury could be worse then you perceive it to be. The endorphins are masking your pain. Stop exercising before you compound the injury. Losing a day or two of exercise is better than a week.
Exercise is the one thing in life that comes with a guarantee for success.
The body exists to do it. Your body is biologically designed to respond to exercise in a positive way, regardless of your sex, age, or physical condition. Participating smart with proper preparation is all you have to do. Choose your footwear according to the type of exercise you are doing. When you are doing weight resistance exercise, wear a pair of weightlifting shoes.