I'm trying to conduct some research. Please add your data if you currently use or have used a poly in the past. What poly have you used and in what racquet? What weight was the racquet? Did you have any elbow or shoulder pain? Examples: Head Intelligence Prestige XL Approximately 13 oz Unique Big Hitter 17 @ 54lbs No arm or shoulder pain. Head FP Instinct Team Approx 10.5 oz Topspin Cyber Flash 17 @ 54lbs Tennis Elbow, hand/gripping irritation. My guess is the same weight that steadies a racquet for off-center ball strikes also absorbs shock. What is your experience?