11/07/2026
🎾 A stronger serve doesn’t always mean a healthier shoulder.
One of the most consistent adaptations seen in tennis players is a reduction in the external:internal rotator strength ratio of the dominant shoulder.
The repetitive demands of serving and overhead strokes strengthen the muscles responsible for internal rotation, while the posterior rotator cuff—particularly the infraspinatus and teres minor—must repeatedly work eccentrically to decelerate and stabilise the shoulder at extremely high velocities.
Over time, this imbalance can alter shoulder mechanics and increase the load placed on the rotator cuff.
The goal isn’t to eliminate these sport-specific adaptations—it’s to ensure the posterior cuff has the strength and endurance to match the demands of the sport.
Adding targeted external rotation and eccentric strengthening exercises 2–3 times per week can improve dynamic shoulder stability, restore muscular balance, and help keep you performing at your best.
If you’re a tennis player and want help with an injury or want to improve performance contact us today.