If you’ve recently turned 40, you may have noticed that your body doesn’t recover from heavy lifting or weekend home projects as quickly as it once did. While jokes about getting older often focus on gray hair, there are real physical changes happening inside your body, especially in your tendons.
An occasional orthopedic issue for people over 40 is a bicep tendon rupture. You are more likely to suffer this injury once you reach this age.
How Tendons Change With Age
To understand the risk, it helps to know how the bicep works. The bicep muscle is connected by two tendons at the shoulder (called the long head and short head) and one tendon at the elbow (the distal tendon).
As we age, tendons slowly weaken through a process known as tendon degeneration. After age 40, blood flow to the tendons decreases naturally. This reduced circulation causes the collagen fibers, the main structure of tendons, to become less flexible and more fragile. It’s similar to an old rubber band that snaps easily compared to a new one that stretches without breaking.
Why Ages 40–60 Are the Highest Risk Years
Surprisingly, bicep tendon ruptures are not the most common in the elderly. They happen most often in adults between 40 and 60 years old, a phase often called “active aging.” During these years, many people are still very active. They lift weights, play sports, or perform physical work.
While muscles can stay strong with training, tendons do not adapt as quickly. When a strong muscle pulls against a weakened tendon, the tendon may fail, leading to a rupture. Biceps ruptures can occur either near the shoulder or near the elbow, and the cause and treatment can differ.
Distal biceps ruptures (near the elbow) most often occur in men 40–60. Proximal long-head ruptures (near the shoulder) tend to occur in older adults and may be associated with shoulder degeneration/rotator cuff problems.
Common Causes of Rupture After 40
Some ruptures occur after gradual tendon wear, but many, especially distal biceps tears, happen during a specific moment of overload (often when resisting a heavy load). They usually develop over time due to:
- Chronic Overuse: Repetitive use can contribute to tendon irritation/degeneration, particularly at the shoulder. A complete rupture often occurs when a weakened tendon is suddenly overloaded
- Sudden Heavy Load: Catching a falling object or lifting a heavy weight without warming up properly.
- Smoking and Medications: Smoking increases risk. Systemic corticosteroid exposure can weaken tendon tissue. Certain antibiotics, especially fluoroquinolones, have been linked to tendon problems and (rarely) rupture, particularly in older adults and when combined with steroids.
How to Prevent Injury and Stay Strong After 40
The goal isn’t to stop exercising, it’s to train smarter. If you’re over 40, you can greatly reduce your risk by:
- Warming Up Properly: Never lift heavy weights without warming up first. Increased blood flow helps tendons stretch and handle stress.
- Eccentric Training: Eccentric strengthening can help tendon capacity when progressed gradually—ideally guided by a clinician if you have persistent pain.
- Respecting Pain Signals: Persistent pain may signal tendon irritation, but diagnosis requires an exam. Watch for sudden pain, bruising, a “pop,” deformity (“Popeye”), or new weakness.
Final Thoughts
While the chance of a bicep tendon rupture does increase after age 40, it’s far from unavoidable. Your tendons need more care and recovery than they did in your younger years. Therefore, you must stay active, strong, and injury-free.
Consult our board-certified orthopedic surgeon, Dr. Mufaddal Gombera, MD, for treating bicep tendon ruptures. Call us to book an appointment.
