Is it advisable to do exercise when affected by Dysferlinopathy - Miyoshi Myopathy? Which activities would you suggest and how intense should they be?

For individuals living with Dysferlinopathy—specifically Miyoshi Myopathy—low-impact, sub-maximal exercise is generally recommended to maintain joint mobility and cardiovascular health. While intense, eccentric, or high-resistance training can exacerbate muscle damage, personalized, gentle activity is a vital tool for managing the functional limitations associated with this condition.

Is exercise safe for patients with Miyoshi Myopathy?

Yes, exercise is encouraged for those with Dysferlinopathy, but it must be approached with caution. Because Miyoshi Myopathy involves a deficiency in the dysferlin protein, which is essential for muscle membrane repair, high-intensity or "heavy" eccentric exercise can lead to excessive muscle inflammation and damage. The goal is to remain active without overexerting the muscle fibers, which helps prevent secondary complications like contractures.

What types of activities are recommended for Dysferlinopathy?

Low-impact exercises that minimize gravity-induced stress on the muscles are ideal. Focus on movements that emphasize range of motion rather than muscle hypertrophy. Beneficial activities include:

• Hydrotherapy or swimming: Water provides buoyancy, reducing the load on weakened muscles while allowing for full-range movement.


• Gentle Yoga or Tai Chi: These practices improve flexibility and balance, which are crucial for safety as Miyoshi Myopathy progresses.


• Stationary cycling: Low-resistance cycling helps maintain cardiovascular health without the impact forces of running.


• Walking: Using supportive footwear or assistive devices if necessary to prevent falls.

Which activities should be avoided?

Avoid high-impact sports, heavy weightlifting, and eccentric-heavy exercises (like downhill running or negative repetitions). These activities increase the risk of sarcolemmal rupture, which is already a physiological challenge in patients with Dysferlinopathy. Always prioritize "pacing"—if you feel muscle fatigue or soreness that lasts more than 24 hours, you have likely exceeded your threshold.

How can a physical therapist help manage Miyoshi Myopathy?

A physical therapist is essential for creating a tailored program for Dysferlinopathy. They can help with:

1. Developing a personalized stretching routine to combat contractures.


2. Teaching energy conservation techniques to help you manage daily activities.


3. Conducting periodic assessments to adjust your exercise intensity as the disease progresses.

Next steps

• Consult with a neuromuscular specialist or a physical therapist experienced in muscular dystrophies before starting any new regimen.


• Join our community at DiseaseMaps.org to connect with other members living with Miyoshi Myopathy.


• Keep a daily journal of your activity levels and physical response to help your medical team monitor your progress.

Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Dysferlinopathy


• Orphanet: Miyoshi Myopathy (ORPHA:582)


• The Jain Foundation: Guidelines for Dysferlinopathy Patients


• OMIM (Online Mendelian Inheritance in Man): Dysferlin; DYSF