The posterior shoulder fly is a must-do exercise for surfers. It targets the rear deltoids, upper back, and rotator cuff muscles—key players in building paddling endurance. Why is this important? Stronger posterior shoulders help maintain proper paddling posture, reduce fatigue, and enhance your stroke efficiency. This means more time catching waves and less time feeling worn out. Add posterior shoulder flies to your routine to improve your paddling power and stay out in the water longer. 🌊🏄‍♂