Perfect form
Stability ball back extension
Improve your posture and back strength with this at-home or at-the-gym exercise. Combined with a relaxed upper body, it will enable you to power your arms and boost your running performance
Want to run longer without getting tired? The good news is that you don’t have to train harder or add more miles to reach your goal. By improving the strength of your back muscles and learning how to relax your upper body and arms, you’ll see a huge difference.