The Five Use-It-Or-Lose-It Physical Skills
Train five capacities and you keep them into your nineties.
- Difficulty
- Easy
- Time to result
- ~ongoing to results
- Steps
- 4
- Confidence
- 90%
Kotler argues that the 'long slow rot' theory of aging is wrong: physical skills are use-it-or-lose-it, not doomed to decline. Five categories matter most — strength, stamina, flexibility, agility, and balance — and the WHO already quantifies the weekly dose needed to maintain them for peak-performance aging. A single dynamic sport like park skiing can train all five at once. He adds a nuance most miss: after a layoff the body offloads work onto prime movers and lets stabilizer muscles atrophy, so the smart return-to-fitness protocol rebuilds the stabilizers first.
Origin
Kotler was researching peak-performance aging when the story of violin-maker Stradivarius — who built two of his greatest instruments at 92 — convinced him that the accepted decline narrative had to be wrong, prompting him to map which physical skills actually hold up.
Core principles
- 01Physical decline is not inevitable — every physical skill is a use-it-or-lose-it skill you can preserve and even advance late in life.
- 02There are exactly five categories that matter: strength, stamina, flexibility, agility, and balance.
- 03The World Health Organization already specifies the dose for peak-performance aging.
- 04As the body gets efficient it recruits prime-mover muscles and neglects stabilizers, so returning athletes tear stabilizers, not the big muscles.
How to run it
- 1
Reject the long-slow-rot assumption
Accept the research premise that physical skills are use-it-or-lose-it and can be maintained or advanced far later than assumed, so training is worth doing at any age.
Pro tip Interventions matter right up to your eighties and beyond, but the highest-leverage window to start is your twenties and thirties.
- 2
Train the five categories
Structure weekly training around strength, stamina, flexibility, agility, and balance rather than a single modality.
- 3
Hit the WHO dose
Aim for 150-300 minutes of moderate-to-vigorous aerobic work, two strength days, and three flexibility/balance/agility days per week.
Pro tip Pick one dynamic sport that encompasses all five to make the dose easier to reach.
- 4
Rebuild stabilizers after a layoff
If you have been sedentary, deliberately re-train stabilizer muscles like hip flexors and rotator cuffs before loading the prime movers.
Watch out Coming back to athletics after time on the couch, you are more likely to tear an atrophied stabilizer (hip flexor) than the big muscle it protects.
In the wild
Kotler chose park skiing for his book because a single sport used strength, stamina, balance, agility, and flexibility simultaneously.
→ One activity covered all five use-it-or-lose-it categories without needing separate training blocks.
Common mistakes
Loading prime movers first after a layoff
Returning athletes jump into intensity and tear neglected stabilizer muscles because the body has been offloading work onto the big prime-mover muscles.
Is it for you?
Best for
Anyone in their 20s through 80s who wants to preserve physical capability and independence over a lifetime.
Not ideal for
Someone seeking a quick aesthetic result rather than durable, whole-body function.
From the transcript
“Every one of our physical skills are user to lose its skills.”
“We want to train five skills that matter most. Strength, stamina, flexibility, agility, and balance.”
From the episode
Steven Kotler: Peak Performance Aging, How to Stay at the Top of Your Game in Your 30s, 40s, 50s, and Beyond
Steven Kotler