Why Shoulder Pain Peaks in the Summer Summer brings popular outdoor activities like pickleball, kayaking, swimming, and gardening—all involving repetitive arm and shoulder movement. Pickleball players, in particular, frequently report rotator cuff irritation, impingement, tendonitis, and overuse injuries. In fact, about 15–20% of pickleball-related injuries affect the shoulder each year. These activities can stress shoulder joints and soft tissue—so it’s no surprise…