Distal Biceps Tendon Ruptures

The biceps muscle has two tendons at the shoulder (long head and short head) and one tendon at the elbow (the distal biceps tendon). This tendon attaches to the radial tuberosity, a small bump on the radius bone, allowing the biceps to:

• Flex the elbow, and
• Supinate the forearm (turn the palm upward).

A healthy distal biceps tendon is critical for forearm rotation strength and lifting power. When it tears, the tendon retracts toward the upper arm, leaving the muscle shortened and weaker.

Distal biceps ruptures are less common than shoulder-level (proximal) biceps injuries, accounting for about 3% of all biceps tendon tears. However, their impact on strength and function is much greater.

Typical risk factors include:

• Age: Most patients are between 40 and 60 years old.
• Male sex: Over 90% of cases occur in men.
• Heavy lifting or eccentric loading: Attempting to lift or catch a heavy weight as it falls.
• Smoking: Reduces tendon blood supply and increases risk.
• Anabolic steroid use: Weakens tendons by altering collagen structure.

• Sudden, sharp pain in the front of the elbow at the moment of injury.
• Audible or palpable “pop.”
• Immediate weakness when flexing the elbow or rotating the forearm.
• Bruising and swelling appearing within hours.
• Visible bulge in the upper arm (a “reverse Popeye” deformity).
• Tenderness over the front of the elbow.

Patients often describe a sense that something “snapped” or “gave way” when the injury occurred.

Diagnosis begins with a detailed evaluation by Dr. José Vega, Cleveland’s trusted orthopedic sports-medicine specialist.

Physical examination findings include:

• Palpable gap in the front of the elbow where the tendon should be.
• Weakness during supination and elbow flexion.
• Positive hook test—inability to hook a finger under the tendon when the elbow is bent.

Imaging studies confirm the diagnosis and assess whether the tear is complete or partial:

• Ultrasound can quickly visualize tendon integrity.
• MRI provides detailed imaging of the tendon retraction, muscle quality, and surrounding tissue—critical for surgical planning.

The choice between nonsurgical and surgical treatment depends on the patient’s activity level, age, and functional goals.

Nonsurgical Treatment

Nonsurgical care may be appropriate for:

• Older or lower-demand patients, or
• Partial tears with preserved strength.

Treatment includes:

• Rest and immobilization in a sling or brace for comfort.
• Anti-inflammatory medication and ice to control swelling.
• Physical therapy to restore motion and strengthen surrounding muscles.

While pain and function often improve, patients typically lose 30–50% of forearm rotation strength and some endurance with heavy lifting. Active individuals and manual laborers generally find these deficits limiting, which is why surgery is often recommended.

Surgical Repair (Preferred for Complete Tears)

Distal biceps tendon repair restores the tendon to its native insertion on the radius, allowing patients to regain strength and endurance.

Procedure Overview

• A small incision is made at the front or side of the elbow.
• The torn tendon is located, cleaned, and reattached to the radial tuberosity using one of several fixation methods:
  • Suture anchors,
  • Cortical buttons, or
  • Interference screws.
• The repair securely restores tension and alignment of the biceps muscle.

Modern techniques allow strong fixation through minimally invasive incisions, reducing complications and recovery time.

Recovery Timeline

• First 6 weeks: The arm is protected in a brace while gentle motion begins.
• 6-12 weeks: Light strengthening exercises start.
• 3+ months: Progressive return to lifting, work, and recreational activity.

With expert surgical repair and structured rehabilitation, patients typically regain 90–100% of pre-injury strength.

Delayed or Chronic Tears

If the injury is not repaired within the first 3–4 weeks, the tendon can retract and scar, making repair more challenging. In these cases, tendon graft reconstruction (using hamstring or allograft tissue) may be needed to bridge the gap. While recovery still yields excellent function, early evaluation is ideal for the best results.