Why Exercise Feels Harder After 40 (And What Is Actually Happening To Your Body)
- theziblingsalipoon
- Jul 14
- 6 min read
Many people notice a shift in their body as they move into their forties.
The exercises that once felt effortless now leave them feeling sore for days. Recovery seems slower. Strength doesn't come as easily, flexibility feels reduced, and maintaining fitness suddenly requires more consistency than it did ten or twenty years ago.
For some people, this change can be frustrating or even discouraging. They begin to wonder whether they're simply "getting old" and whether it's inevitable that their body will continue to slow down.
The reality is far more encouraging.
Yes, your body changes with age. But those changes are not a reason to stop exercising, they are one of the biggest reasons to start exercising intelligently.
At Body Form, we work with clients in their forties, fifties, sixties and beyond every day.
With a physiotherapy-led approach combining Clinical Pilates and strength training, we help people understand what is happening inside their bodies and, more importantly, what they can do about it.
Your Body Is Changing, But It's Designed to Adapt
Ageing isn't a switch that suddenly flips at forty.
It's a gradual process that affects every system of the body over many years.
Muscle tissue changes.
Bone density begins to decline.
Hormones gradually shift.
Recovery slows.
Tendons become less elastic.
The nervous system changes the way it recruits muscles.
None of these changes happen overnight, and none of them mean you can't become stronger than you are today.
In fact, research consistently shows that people in their forties, fifties, sixties and even seventies continue to build muscle, improve balance, increase bone density and become significantly stronger when following an appropriately designed exercise programme.
The key is understanding that your body now responds differently to training than it did in your twenties.
Muscle Mass Naturally Declines
One of the biggest physiological changes associated with ageing is a gradual reduction in muscle mass.
This process is known as sarcopenia.
From around the age of 30, adults begin to lose small amounts of muscle each decade.
After the age of 50, this process tends to accelerate if no resistance training is performed.
Muscle is much more than something that helps us look toned.
Healthy muscle tissue is responsible for:
Producing strength
Supporting joints
Maintaining balance
Protecting bone health
Improving metabolism
Helping regulate blood sugar
Allowing us to continue doing the activities we love
When muscle mass declines, everyday tasks become more difficult.
Carrying shopping bags.
Lifting grandchildren.
Walking up hills.
Getting up from the floor.
Even maintaining good posture throughout the day becomes harder.
The good news?
Muscle is remarkably responsive to resistance training at every age.
Recovery Takes Longer
Many people notice that after forty they simply don't "bounce back" from exercise the way they once did.
This is normal.
Recovery involves many systems working together, including:
Muscle repair
Tendon recovery
Nervous system recovery
Hormonal regulation
Sleep quality
Nutrition
As we age, these systems become slightly less efficient.
This doesn't mean you should exercise less.
It means recovery becomes an important part of your training programme.
Adequate sleep, appropriate nutrition, sufficient protein intake and allowing muscles time to recover between harder sessions all become increasingly valuable.
Often the goal isn't to train harder.
It's to train smarter.
Tendons Change Too
Muscles aren't the only tissues affected by ageing.
Tendons, the structures that connect muscle to bone also change over time.
Healthy tendons are incredibly strong and designed to store and release energy.
As we age they become:
slightly less elastic
slower to recover
less tolerant of sudden increases in load
This is one reason why people who suddenly decide to return to running, tennis or high-impact exercise after years of inactivity sometimes develop tendon problems.
Conditions affecting the Achilles tendon, rotator cuff, patellar tendon and gluteal tendons become increasingly common during middle age.
The solution is rarely complete rest.
Instead, tendons respond exceptionally well to progressive loading.
Clinical Pilates and structured strength training provide controlled environments where tendons can gradually rebuild their capacity without excessive stress.
Bone Health Becomes Increasingly Important
Bone is living tissue.
Just like muscle, it responds to load.
From around midlife onwards, bone density gradually declines, particularly after menopause in women, although men also experience age-related reductions in bone mass.
Without appropriate loading, bones slowly become less dense.
This increases the risk of osteoporosis and fractures later in life.
The encouraging news is that bone responds positively to:
resistance training
weight-bearing exercise
impact (where appropriate)
progressive loading
Simply walking is beneficial for general health, but maintaining bone density often requires exercises that challenge the skeleton more significantly.
This is why our physiotherapy-led strength classes incorporate progressive resistance alongside Pilates principles.
Hormones Influence How We Feel
Hormones play an important role in how our bodies recover, build muscle and regulate energy.
For women, the years leading into menopause and beyond are associated with changes in oestrogen levels, which influence:
muscle maintenance
tendon health
bone density
body composition
recovery
For men, testosterone gradually declines with age, affecting muscle development, energy levels and recovery.
These hormonal changes are normal.
Rather than working against them, an appropriately designed exercise programme helps offset many of their effects.
Regular resistance training has consistently been shown to support healthy ageing in both men and women.
Balance Changes Earlier Than Most People Realise
Many people associate balance problems with very old age.
In reality, subtle changes begin much earlier.
Balance relies on several systems working together:
vision
inner ear function
muscle strength
joint awareness (proprioception)
reaction time
As these systems gradually change, balance becomes slightly less automatic.
The encouraging part is that balance is highly trainable.
Exercises involving:
single-leg control
stability
coordination
controlled strength
can significantly reduce fall risk while improving confidence during everyday activities.
This is one reason Clinical Pilates is particularly valuable as we age.
Why Strength Training Becomes More Important, Not Less
One of the biggest misconceptions about ageing is that people should avoid lifting heavier weights.
In reality, the opposite is generally true.
Strength training helps maintain:
muscle mass
tendon capacity
bone density
balance
independence
metabolic health
The key is choosing the right level of load for your body.
This doesn't mean everyone should be performing heavy barbell lifts.
Progressive resistance can come from:
Pilates equipment
free weights
resistance bands
body weight
functional movement patterns
The important factor is that the body continues receiving a meaningful strength stimulus.
Clinical Pilates and Strength Work Together
Many people ask whether they should choose Pilates or strength training.
At Body Form, we don't believe you have to choose.
Clinical Pilates develops:
movement quality
body awareness
mobility
coordination
posture
core control
Strength training develops:
muscle mass
tendon resilience
bone health
force production
functional capacity
Together, they create a well-rounded programme that supports healthy ageing.
This is exactly why our studio combines both approaches.
You're Not Too Old To Start
Perhaps the most important message is this:
Your body never stops adapting.
Research has shown that adults in their seventies, eighties and even nineties can significantly increase strength through progressive resistance training.
The body continues responding remarkably well to appropriately prescribed exercise throughout life.
It's never too late to become stronger.
It's never too late to improve balance.
It's never too late to move with more confidence.
Practical Takeaways
Feeling different after 40 is normal, but it doesn't mean your body is "breaking down."
Muscle mass, tendon health and bone density naturally change with age, but all respond positively to exercise.
Recovery becomes increasingly important, making programme design more valuable than simply exercising harder.
Strength training is one of the most effective ways to support healthy ageing in both men and women.
Clinical Pilates complements strength training by improving movement quality, stability and mobility.
A physiotherapy-led programme ensures exercises are tailored to your body, goals and current capacity.
Ready to Invest in Your Future Health?
The best time to begin looking after your body isn't when pain starts or mobility declines.
It's now.
At Body Form, our physiotherapy-led Clinical Pilates and strength programmes are designed to help you build strength, maintain independence and continue doing the activities you love for decades to come.
Whether your goal is to keep surfing, playing golf, chasing grandchildren, travelling, or simply feeling stronger in everyday life, we're here to help.
Book an initial physiotherapy assessment or contact our team to find the programme that's right for you.
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