When we think about arthritis, we often focus on our joints, particularly the pain, stiffness, and inflammation it can cause. But there’s another piece of the puzzle that doesn’t get nearly as much attention: muscle health. And sitting quietly in the background is a key hormone that helps regulate it all, testosterone.
So how do testosterone, muscle mass, and arthritis connect? Let’s break it down.
Why muscle matters in arthritis 
Muscles do more than just help us move—they act as a support system for our joints. Strong muscles absorb load, improve stability, and reduce strain on affected joints.
For people living with arthritis, maintaining muscle mass can:
- Reduce joint pain and stiffness
- Improve mobility and function
- Support balance and reduce falls risk
- Enhance overall quality of life
But muscle mass isn’t just about exercise, it’s also influenced by hormones, including testosterone.
What does testosterone actually do?
Testosterone is often thought of as a “male hormone,” but it plays an important role in both men and women. It contributes to:
- Building and maintaining muscle mass
- Supporting bone strength
- Regulating energy levels and mood
- Assisting with fat distribution
Naturally, testosterone levels decline with age. However, for some people, levels can drop more significantly due to chronic illness, long-term inflammation, stress, or certain medications.
The link between testosterone and muscle loss
Lower testosterone levels are associated with reduced muscle mass and strength a condition sometimes referred to as sarcopenia.
For someone with arthritis, this can create a challenging cycle:
- Pain leads to reduced movement
- Reduced movement leads to muscle loss
- Muscle loss increases joint load and instability
- This can worsen pain and fatigue
Breaking this cycle is key to improving long-term outcomes.
Inflammation, hormones, and arthritis
In inflammatory arthritic conditions, chronic inflammation can have ripple effects on hormone levels which can thereby;
- Suppress hormone production
- Accelerate muscle breakdown
- Increase fatigue and reduce motivation to move
This is why for some people, arthritis is not just a joint condition, it can affect the whole body, including muscle and hormonal health.
So, what can you do about it?
While hormone levels can play a role, the good news is there are practical, evidence-based strategies that can help protect muscle mass and support joint health:
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Strength-based movement
Resistance training (using body weight, bands, or weights) is one of the most effective ways to build and maintain muscle at any age and at any stage of arthritis.
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Prioritise protein
Adequate protein intake supports muscle repair and growth. Ensuring enough protein is in each meal and consuming enough over the day can be very beneficial. Check in with a dietitian to make sure you are getting enough or help find easy ways to increase it.
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Manage inflammation
Working with your GP or specialist to manage inflammation through medication, lifestyle, and self-management strategies can help protect both joints and muscles.
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Sleep and recovery
Poor sleep can impact hormone regulation, including testosterone. Prioritising good sleep habits supports overall health and recovery.
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Medical review when needed
If symptoms such as significant fatigue, muscle loss, or low mood are present, it may be worth discussing hormone health with your healthcare provider.
The bottom line
Arthritis is more than a joint condition; it’s a whole-body experience. Testosterone, muscle mass, and inflammation are all interconnected, and together they can influence how you feel, move, and function day to day.
The key takeaway?
Supporting your muscles is one of the most powerful things you can do to support your joints. Even small, consistent changes like gentle strength exercises or improving nutrition can make a meaningful difference over time.
