Why Your Body Needs Stress

It sounds backwards, but your body needs stress.

Not chronic stress from work, poor sleep or worrying. It needs physical stress.

The human body works on a simple principle:

Stress → Recovery → Adaptation

You challenge your body with an appropriate amount of stress. You recover. Your body adapts so that the next time, that same challenge is easier.

That’s exactly what strength training does.

When you squat, deadlift, press, carry or pull heavy weights, you’re asking your muscles, bones, tendons and nervous system to do something they’re not yet capable of doing comfortably. Your body responds by rebuilding itself stronger.

Over time, this leads to:

  • Increased muscle mass

  • Stronger bones and improved bone density

  • Stronger tendons and connective tissue

  • Greater strength and power

  • Improved balance and resilience

  • Better ability to cope with everyday physical tasks

Many forms of exercise are fantastic for cardiovascular health, mobility and enjoyment. Swimming, walking, cycling and Pilates all have their place.

But if your goal is to become stronger, build or maintain muscle, and preserve bone density as you age, progressive resistance training is the most effective tool we have.

And that’s important because strength isn’t about lifting impressive numbers.

It’s about staying independent.

It’s about getting off the floor without help.

It’s about carrying shopping without pain.

It’s about lifting your grandchildren.

It’s about reducing your risk of falls and fractures.

It’s about maintaining good posture, confidence and quality of life into your 60s, 70s and beyond.

Yes, lifting weights can be challenging. It should be. That’s the stimulus your body needs.

The key is applying the right amount of stress, recovering properly, and repeating the process consistently.

Your body doesn’t adapt because exercise is easy.

It adapts because you gave it a reason to become stronger.

At Poseidon Performance, that’s exactly what we do: apply the right stress, at the right time, for the right person—whether you’re recovering from injury, returning after surgery, or simply want to stay strong for life.

Nicholas Martin-Jones

Nicholas Martin-Jones is a strength & conditioning coach and sports rehabilitation specialist, and the founder of Poseidon Performance in Dartmouth, Devon. With over two decades of experience in high-performance environments — including elite military units, international athletes, and complex rehabilitation settings — his work focuses on building strength, resilience, and long-term physical capacity.

Nicholas specialises in bridging the gap between rehabilitation, performance, and longevity. His approach is principle-driven rather than method-led, using progressive loading, intent, and adaptation to help clients move beyond maintenance and build bodies capable of meeting real-world demands.

At Poseidon Performance, he works with adults who value intelligent training, evidence-based practice, and outcomes over trends — from return-to-play rehabilitation to strength for life.

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The Best Way to Train in Your 40s for Strength, Athleticism, and Longevity