Eccentric Training for Treating Tendinopathies

Introduction

Eccentric training is a helpful way to deal with tendon issues. It differs from regular muscle workouts since it is more about lengthening muscles than shortening them. This exercise method can work well for various tendon problems, such as Achilles (the fibrous band linking the calf muscles to the heel bone at the back of the lower leg tendinopathy), patellar (knee) tendinopathy, and tennis elbow (injury to forearm muscles and tendons). These conditions usually happen from overusing certain tendons. Recent research suggests that doing specific eccentric exercises could be a solution. This article goes into detail, exploring how these exercises ease the pain linked to tendon issues.

What Is Tendinopathy?

Tendinopathy is a condition involving damage to a tendon and is very common in all age groups. It can result from overuse, aging, or injury and often affects the shoulders, elbows, wrists, knees, and heels. There are two main types of tendinopathy:

• Tendonitis: Tendonitis is characterized by inflammation or swelling of the tendon, commonly arising from overuse or repetitive strain on the affected tendon.

• Tendinosis: Unlike tendonitis, tendinosis is a non-inflammatory condition. It involves degeneration of the tendon without significant inflammation. This can be a chronic condition resulting from long-term wear and tear.

While tendinopathy can be challenging, it is important to remember it is treatable. Common symptoms include pain, swelling, and reduced range of motion at the affected joint. Possible treatments span from rest and applying ice to engaging in physical therapy and, in certain instances, using medications or surgical procedures.

The approaches to deal with tendinopathies are as follows:

• Concentric Training: Concentric training involves muscle shortening during contraction, like the upward phase of a bicep curl. It may be included in rehabilitation but does not specifically target eccentric loading, which is crucial for tendon health. Example: During a bicep curl, the upward phase where the bicep muscle shortens is a concentric contraction.

• Eccentric Training: Eccentric training involves muscle lengthening during contraction, like the downward phase of a bicep curl. It is gaining attention for tendinopathy treatment as it mimics gradual lengthening during activities, promoting tendon strength and resilience. Example: In a bicep curl, an eccentric contraction is the downward phase where the bicep muscle lengthens.

Why Is Eccentric Training Widely Accepted?

Eccentric training is a type of exercise that focuses on the controlled lengthening of a muscle-tendon unit rather than its contraction or shortening. The muscle gradually extends under tension during eccentric exercises, resisting an external force. This contrasts with concentric exercises, where the muscle shortens as it contracts. Due to this concept, eccentric training is a widely accepted technique.

According to recent studies, eccentric training to an injured tendon effectively reduces pain for individuals with tendinopathies. Over 80 percent of Achilles tendinitis patients experienced complete relief or significant improvement in a six-week program. Additionally, patients with lateral epicondylitis (tennis elbow) responded more favorably to eccentric training than passive rehabilitation. Eccentric training for the shoulders and upper extremities also lowered the chances of patients with rotator cuff tendinopathy (a condition where the tendons and muscles around the shoulder joint become irritated or damaged) opting for surgery.

How Does Eccentric Training Work for Treating Tendinopathies?

The controlled lengthening in eccentric training helps load the tendon to stimulate tissue remodeling and adaptation. This type of training is often incorporated into rehabilitation programs for various tendon-related injuries and conditions. Here are some examples of eccentric exercises that individuals can try. It is crucial to consult with a doctor or physical therapist before incorporating a new exercise routine.

• Heel Drops Over a Step (Achilles Tendonitis): This exercise can be useful for Achilles tendonitis, as it targets the calf muscles and the Achilles tendon. The controlled eccentric movement can help strengthen and rehabilitate the affected area.

• Eccentric Squat (Patellar Tendonitis): Eccentric squats can be adapted for individuals with patellar tendonitis. The controlled descent in the squat engages the quadriceps and patellar tendon, aiding in strengthening and improving function.

• Eccentric Push-Up (Various Tendonitis): Eccentric push-ups, including the shoulder and elbow joints, engage the upper body. This exercise can be incorporated for tendonitis in these areas, promoting controlled strengthening and flexibility.

• Overhead Press (Shoulder Tendonitis): Overhead press with weights or substitutes can benefit shoulder tendonitis. The eccentric phase of lowering the weights engages the shoulder muscles and tendons, contributing to overall strength and rehabilitation.

It is important to note that while these exercises can be helpful, individuals with tendonitis should consult with a professional or a physical therapist before starting any exercise regimen. The professionals can guide appropriate exercises, modifications, and progression to ensure a safe and effective rehabilitation process. Additionally, the intensity and frequency of exercises should be tailored to an individual's specific condition and pain tolerance.

What Are the Potential Risks Associated With Eccentric Training?

• Like other forms of physical activity, eccentric exercise risks muscle soreness or injury, despite feeling less strenuous than concentric exercise during the workout, eccentric exercise's ability to cause micro-tears in muscle fibers can lead to delayed-onset muscle soreness (DOMS), an achy feeling in the muscles.

• While DOMS is generally not severe and tends to resolve within a few days, it signals the need for rest as the muscles undergo repair. Subsequent repetitions of the same exercise should reduce tiredness or soreness compared to previous sessions.

• Injury is also a potential risk associated with eccentric exercise, especially if incorrect movements are employed or accidents, such as a loss of balance, occur during the activity.

Conclusion

Eccentric training has emerged as a highly promising and effective approach for treating tendinopathies. The positive outcomes observed in various studies highlight its potential to alleviate symptoms and promote long-term healing and improved functionality. By harnessing the body's natural mechanisms for tissue repair and adaptation, eccentric training offers a holistic and sustainable solution for individuals grappling with tendinopathies. As further research continues, incorporating eccentric training into rehabilitation protocols promises to enhance the overall quality of life for those affected by tendon-related issues. With its patient-friendly and evidence-based nature, eccentric training is a guiding light, paving the path toward a more optimistic and luminous future in managing tendinopathies.