"Thinking without learning is dangerous. Learning without thinking is wasted effort."
If there’s one place that shows up in modern life, it’s the gym.
Most people I meet are drowning in training “thought”:
- Arguing about optimal rep ranges
- Obsessing over micro-details in programs
- Debating whether 3 sets or 4 sets is “best”
But when you zoom out, most of that thinking isn’t anchored to any real learning about where these ideas came from, how the body actually adapts, or what really matters for long-term strength and muscle.
The perfect example?
The Cult of Three Sets
“Do 3 sets of 10.”
You’ve seen it everywhere:
- On machine placards
- In cookie-cutter PDFs
- From trainers who learned it from their cert manual
- In rehab and PT settings
It’s treated like gravity. This is just “how strength training works.”
So where did it actually come from?
The Real Origin Story
The three-set standard traces back to Dr. Thomas DeLorme in the 1940s.
He was rehabbing injured soldiers after World War II. At that time, the medical world was terrified of heavy lifting. The fear was that too much effort would be dangerous.
DeLorme experimented and found something simple that worked.
3 sets. About 10 reps per set. Each set progressively heavier.
His patients:
- Gained strength
- Recovered well
- Returned to duty faster
Because it worked, his method got written into rehab protocols, textbooks, and professional education. From there, it leaked into:
- Physical education
- Early bodybuilding culture
- General “fitness wisdom”
That’s how 3×10 became the default. Not because the universe prefers 3 sets… but because an early rehab method did well and then calcified into dogma.
What Actually Matters for Strength and Muscle
When you strip away the mythology, the data and practical coaching agree on a few simple points:
Muscles respond to total hard sets per muscle per week, not a sacred “3 sets per exercise.”
For most adults, a solid working range is ~10–20 hard sets per muscle group per week.
You can get there with all kinds of structures:
- 3 sets of 3–4 exercises
- 4–5 sets of 2 exercises
- Different set counts on different days
So why does 3 sets stick around?
Because it’s, Simple, Easy to remember, Time-efficient, and “Good enough” for most people.
That’s it. Three sets isn’t magic. It’s just a survivable compromise that fits in a 45–60 minute workout.
How to Use This in Your Own Training
Here’s how I’d translate all of this into something you can act on immediately.
- Stop worshiping 3 sets. Use it as a default, not a doctrine. Two hard sets might be perfect for a busy day. Four or five might be right when you’re prioritizing a specific lift.
- Think in weekly sets, not magical recipes. Decide how many hard sets you want per muscle per week (10–20 is a good working window), then distribute those across your days however your schedule allows.
You can tell yourself:
Set 1: dial it in
Set 2: refine
Set 3: own it
That’s a helpful focus tool. Just remember you’re using a story, not obeying a secret law of the nervous system.
Audit your thinking vs learning. Ask yourself:
- Am I reading about training more than I’m actually training?
- Am I copying programs without understanding the basic principles behind them? If yes, tighten that gap.
Let simplicity work for you, not against you.
A basic program that:
- Hits each major pattern 2–3x per week
- Accumulates enough weekly hard sets
- Progresses load slowly over time
…will beat the “perfect” plan you keep editing but never execute.
So here’s your assignment for this week:
Pick one lift, set a clear weekly set target for that muscle group, and run it for the next 4–6 weeks without second-guessing yourself. Adjust loads, track how you feel, and let the results teach you more than another carousel ever will.
CHAT NEXT WEEK <3