Glenohumeral Osteoarthritis

Explanation of Diagnosis

Glenohumeral osteoarthritis is wear-and-tear arthritis in the shoulder joint where the head of the upper arm (humerus) meets the shoulder socket (glenoid). Over time, the protective cartilage and joint surfaces can become rougher, and the body may respond with stiffness and small bone changes. This condition often develops gradually from age-related degeneration, prior injury, repeated stress, or abnormal shoulder mechanics. Common symptoms include deep shoulder ache, stiffness (especially reaching behind your back or overhead), reduced range of motion, and pain with use.

Specific Work Modifications

• Keep frequently used items at about waist to chest height to reduce overhead reaching.
• Limit repetitive lifting, pushing, or pulling with the affected arm; share the load or alternate arms when possible.
• When working at a desk, adjust your chair and keyboard so your shoulders can stay relaxed rather than rounded forward.
• Use a step stool to avoid stretching up to reach high shelves, and keep tasks close to your body.
• Take short shoulder-friendly breaks every 30 to 45 minutes to move gently and reset posture.
• Choose tools with easier grips and consider an ergonomic handle to reduce strain during gripping and twisting.

Specific Activity Modifications

• Reduce activities that repeatedly force the shoulder into painful overhead positions, especially for long periods.
• Swap behind-the-back movements for front-of-body tasks, and avoid aggressive stretching that triggers sharp pain.
• During workouts, temporarily limit pressing motions and heavy lifting that causes deep joint pain; use lighter resistance and a pain-free range.
• For sports or hobbies that involve throwing or serving, shorten the throwing distance and focus on controlled, pain-free practice.
• Warm up before activity and start with low-intensity movements, then progress only if symptoms stay stable.
• If flare-ups happen after a specific activity, back off for a short period and resume with a smaller dose of the activity.

Recommended Supplements

• Glucosamine sulfate 1500 mg once daily may help some people with osteoarthritis symptoms, particularly with consistent use over time.
• Chondroitin 800 to 1200 mg once daily may provide additional symptom relief for some individuals with osteoarthritis.
• Omega-3 fatty acids (fish oil) 1 to 2 grams per day of combined EPA/DHA may help lower inflammation-related discomfort in some people.
• Vitamin D 1000 to 2000 IU daily may be helpful if your levels are low or you have limited sun exposure; consider checking with your clinician.

Recommended Nutrition and Hydration

Diet Recommendations

• Aim for a Mediterranean-style pattern with vegetables, fruits, whole grains, beans, olive oil, and fish to support joint health.
• Choose lean protein sources (fish, poultry, beans, yogurt) to support tissue repair and maintain muscle strength around the shoulder.
• Limit highly processed foods and sugary drinks, which can contribute to higher inflammatory load in some people.
• Maintain a healthy body weight when possible, since extra load can worsen overall pain and function in osteoarthritis.
• Include vitamin C and antioxidant-rich foods (citrus, berries, peppers) as part of a balanced diet.

Hydration Tips

• Drink enough water to keep urine pale yellow, especially if you exercise or sweat.
• Don’t rely on large amounts of caffeine or alcohol to “push through” pain; they can worsen sleep and recovery for some people.

Home Exercise Prescription

Do these exercises about 4 to 6 days per week, in short sessions, with pain kept at a mild level (generally no more than about 2 to 3 out of 10).

1. Pendulum (supported arm swing): Lean forward with your other hand supported on a table; let the affected arm hang and make small gentle circles, 30 to 60 seconds each direction.
2. Wall slides (gentle forward flexion): Stand facing a wall, use your fingers to walk your arm up the wall as far as is comfortable, and then slide back down, 8 to 12 slow repetitions.
3. Scapular retraction (shoulder blade squeeze): Sit or stand tall and gently pull your shoulder blades back and slightly down without shrugging, hold 5 seconds, repeat 10 times.
4. Isometric shoulder external rotation: With your elbow tucked by your side and forearm across your body, push your forearm outward lightly against a wall or your other hand without moving the joint, hold 10 seconds, repeat 8 to 10 times.
5. Doorway stretch (chest stretch): Forearms on the door frame, step through until you feel a mild stretch in the front of the chest/shoulder, hold 20 to 30 seconds, repeat 3 times.
6. If any exercise causes sharp, worsening, or new severe pain, stop and contact your clinician.

Helpful Books

• "Explain Pain" written by David G. Butler and Lorimer Moseley
• "Becoming a Supple Leopard" written by Kelly Starrett
• "Move Your DNA" written by Katy Bowman