#007. Why Lift Weights If You’re Already Endurance Fit?
Hi there. It’s Rebecca.
Hi there. It’s Rebecca.
An interesting question I recently got last week was:
“If I am Already Endurance Fit, Why Lift at All?“
If you’re already running, cycling, swimming, hiking or doing another endurance sport regularly, you might be wondering why you need to lift weights at all.
It’s a good question.
After all, you’re already active. You’re already training. You’re already doing far more than the average person.
For years, I thought endurance fitness was enough too.
As a former professional cyclist and two-time UK age-group triathlon champion, I spent decades building a powerful aerobic engine. I could ride for hours, train consistently, and keep going year after year.
Then, in my early fifties, I discovered something that genuinely surprised me.
I couldn’t perform a proper push-up.
Despite all those years of training, there was a glaring weakness hiding in plain sight.
I was endurance fit. But I wasn’t as strong, balanced and resilient as I thought.
That moment changed how I viewed fitness.
“Endurance fitness and all‑round strength aren’t the same thing.” — Pull Quote
Every Activity Builds Strengths — And Leaves Gaps
Every activity develops strengths. Every activity also leaves gaps.
Running develops a remarkable aerobic engine, but it doesn’t challenge every muscle group equally.
Cycling builds strong legs and endurance, but much less upper‑body strength.
Swimming develops some areas beautifully while leaving others largely untouched.
The body adapts specifically to what we repeatedly ask it to do.
That’s where resistance training comes in.
Not to replace the activities you love. Not to turn you into a gym person. But to help fill the gaps those activities leave behind.
Strength Becomes Your Armour
In the Reinvent Strong™ philosophy, I call this your Armour.
Your Anchor sport keeps you consistent. Your Antagonist movement helps balance the repetitive demands of that sport. But your Armour is what helps support everything else you do.
Resistance training helps:
- preserve lean muscle
- support your joints
- strengthen your bones
- create the foundation that allows you to keep moving well for years to come
It isn’t about chasing numbers. It isn’t about spending hours in a gym. And it certainly isn’t about trying to look like somebody else’s version of fitness.
It’s about building and maintaining the muscle that supports the life you want to keep living.
“Strength resistance training builds the structure that protects your ability to stay active.”
Why Light Weights Eventually Stop Working
There comes a point where lifting the same light weights week after week stops creating meaningful change.
You can feel it.
You do the same exercises, but nothing really improves — not your strength, not your energy, not your confidence.
The reason is simple:
“If the demand never changes, the body has no reason to change either.” — Pull Quote
To build or maintain muscle, your muscles need a reason to adapt.
That’s why progressive overload matters.
Not aggressively. Not every week. And not at the expense of good form.
Simply asking your muscles to do a little more over time.
That might mean:
- slightly heavier weights
- more repetitions
- greater control through a movement
The goal isn’t punishment. The goal is adaptation.
Three Sessions a Week Is Enough
One of the biggest misconceptions about resistance training is that it requires living in a gym.
It doesn’t.
If you’re already running, cycling, swimming, hiking or doing other activities you enjoy, two to three strength sessions each week is often enough.
Thirty to forty minutes. Consistently. Year‑round.
That’s where the magic happens.
Not through heroic efforts. Not through occasional bursts of motivation. Through consistency.
The same principle that applies to endurance sports applies here too.
Momentum Wins™.
Always.
Rebecca
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