There is a particular species of man who can negotiate a difficult contract at 9, survive six meetings by lunch, board a flight at 4, answer emails at 11 and still announce, with alarming confidence, “I’ll get a workout done.” Then his body starts doing something strange and he handles it like a delayed expense report: ignore it, push through it, hope it disappears. A sore joint? Training. Constant exhaustion? Work. Feeling unlike himself? Age, probably. And if the body continues complaining? Excellent. Add another productivity hack. Autoimmune disease has a slightly inconvenient message for this man: sometimes the answer isn’t to become tougher. Sometimes it’s to pay attention.
Are autoimmune diseases different in men?
Autoimmune diseases are not simply “women’s diseases.” Women develop many autoimmune conditions more often than men, but men can develop them too, and the difference varies considerably between conditions.
Sex can influence autoimmune disease through several biological factors, including hormones, genes and differences in immune-system activity. Some autoimmune diseases show a strong female predominance. Others have a smaller difference between the sexes, and a few are more common in men.
For example:
Systemic lupus erythematosus (SLE) is much more common in women, although men can develop it and may experience a different pattern of complications.
Rheumatoid arthritis is more common in women.
Multiple sclerosis is more common in women.
Ankylosing spondylitis has traditionally been associated more strongly with men, although research suggests the difference between men and women may have been overstated because women have historically been underdiagnosed.
Some autoimmune conditions affecting male reproductive organs are, by their anatomy, male-specific, but these are different from saying that a major systemic autoimmune disease occurs only in men.
So the useful question isn’t really, “Which autoimmune diseases do men get?”
It is: How can biological sex influence autoimmune disease, and what does that mean for a man trying to stay fit and functional?
Why does autoimmune disease affect men and women differently?
There is no single explanation for the sex difference in autoimmune disease.
Hormones can influence immune activity
Sex hormones, including testosterone and oestrogen, interact with the immune system. Their effects are complex, but they can influence how immune cells communicate and respond.
This is one reason autoimmune diseases can behave differently across sexes and why some conditions change around major hormonal transitions.
That does not mean testosterone protects men from autoimmune disease or that oestrogen causes autoimmune disease. Biology is considerably less tidy than that.
Genetics also matter
Many genes involved in immune regulation are located on the X chromosome. Because women generally have two X chromosomes and men have one, researchers consider X-chromosome biology one possible contributor to sex differences in autoimmunity.
But genetics alone do not explain the whole picture. Environment, hormones, age and other factors interact with genetic susceptibility.
The takeaway for a busy professional is simple: being male doesn’t make someone immune to autoimmune disease, and being fit doesn’t make someone immune either.
Why can the male performance mindset make autoimmune disease harder?
This is where biology meets behaviour.
A lot of men are comfortable with a very simple equation: More effort = better result.
It works surprisingly well in the gym. Lift progressively, train consistently, eat appropriately and your physical capacity can improve.
It also works at work. Put in more effort, solve more problems, take on more responsibility and you may move forward professionally.
Autoimmune disease can make that equation unreliable.
Your body may not respond to increased effort in the way you expect. A training session that once felt manageable may suddenly feel disproportionately difficult. Your physical capacity may fluctuate. Your usual routine may become harder to maintain.
That can create a particularly frustrating thought: “I used to be able to do this.”
The mistake is turning that statement into a judgement about yourself. Your current capacity is not a referendum on your discipline. It is information.
Can men exercise with autoimmune disease?
Yes, many people with autoimmune diseases can remain physically active, but the appropriate amount and type of exercise depend heavily on the specific condition, symptoms, treatment and individual circumstances.
That is why there is no universal autoimmune workout.
For a fitness coach, the useful principle is different: training should support your ability to live your life rather than constantly testing your limits.
Stop treating every workout like a performance test
If your entire fitness identity depends on constantly improving numbers, changes in physical capacity can become psychologically brutal.
A more sustainable approach is to value:
Consistency over occasional heroic sessions
Maintaining strength and mobility rather than chasing constant personal records
Adjusting training when your body isn’t responding normally
Looking at progress over months rather than judging yourself by one workout
Keeping enough flexibility in your routine to accommodate unpredictable days
This isn’t an argument for doing less forever.
It is an argument for matching effort to your current capacity.
If you’re dealing with an autoimmune condition, your healthcare team should guide disease-specific exercise restrictions or precautions. A coach can then help turn those boundaries into a realistic fitness routine.
Why does “I'm fine” become a problem?
A man can continue going to work, meeting deadlines, travelling and occasionally training while his health is deteriorating.
That creates a strange illusion: If I’m still functioning, I must be fine. But functioning and functioning well are not the same thing. Ask a different question: What does my current lifestyle cost me after the workday ends?
If you can finish the day but have nothing left for your family, hobbies, training or ordinary life, your calendar may be hiding the real cost.
This isn’t about becoming hypervigilant about every ache. It’s about noticing meaningful changes in your normal baseline. Your body has a history. You know what your usual training, energy and physical capacity feel like. Pay attention when that baseline changes and stays changed.
How can men build a healthier relationship with fitness?
Stop using your old body as today’s benchmark
Previous personal records are useful memories, not permanent obligations. Your goal today should be based on what your body can reasonably handle today.
Separate fitness from numbers
Strength matters. Cardiovascular fitness matters. Muscle matters. But your identity shouldn’t depend entirely on lifting more, running faster or training more often. Fitness is also the ability to participate in your life.
Build flexibility into your routine
A rigid plan assumes that every week will behave itself. Life rarely does. A flexible fitness routine gives you room to adjust training without turning one disrupted week into a complete collapse of your habits.
Know when to stop experimenting
If something is persistent or unexplained, don’t keep changing workouts, supplements and diets indefinitely while hoping you’ll eventually stumble upon the answer.
Medical assessment has a place. So does coaching. They simply answer different questions. A doctor can investigate and manage the medical condition. A coach can help you build sustainable habits around the boundaries you’ve been given.
What should men remember about autoimmune disease?
The biggest shift may be changing what strength means. Strength isn’t always pushing harder. Sometimes it is recognising that the old strategy isn’t working. Sometimes it is choosing consistency over intensity. Sometimes it is accepting that today’s capacity is different from last year’s. And sometimes it is asking for help before a manageable problem becomes a much bigger disruption. For a busy professional, the goal isn’t to build a lifestyle that looks impressive on paper. It is to build one that you can keep living. There is a quieter kind of strength in that.
The man who can run on four hours of sleep, train through pain and answer emails while boarding a flight probably looks tough from the outside. But the body keeps its own spreadsheet, and eventually it sends an invoice. Autoimmune disease can make that invoice harder to ignore. The answer isn’t surrendering ambition or putting your trainers in a museum. It is learning that toughness and awareness are not opposites. Sometimes the strongest move is reducing the load, changing the plan, getting the right help and accepting that your body isn’t interested in your quarterly targets. You don’t need to prove that your body can survive your lifestyle. Build a lifestyle your body can repeatedly support.