This guide was written and reviewed by Serge, MSc . As a martial artist and natural lifter with over 10 years of training experience, what I share comes from my own training and from digging into the research behind it.
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In over ten years of heavy natural lifting, I’ve never had a real injury.
People who train with me notice it and ask how. I’ve lifted heavy for years, which is exactly when most people pick up nagging problems.
So I’ve thought about it a lot, and I’ve talked it through with plenty of lifters who’ve questioned me. Here’s my answer.
I think the secret is flexibility.
My Only Real Tweak Taught Me Something
First, an admission. The one minor injury I’ve had came from an unexpected place. I started doing outdoor cardio, and my side cramped up.
For years I’d avoided cardio, because some people insisted you don’t need it and that it kills your gains. That advice didn’t do me any favors, and it’s the same kind of “expert” advice that often doesn’t hold up. I cover more of it in my post on bodybuilding myths for natural lifters.
When I finally added cardio, my body met a movement it wasn’t prepared for, and something gave. If you want to mix the two, my post on combining weightlifting and cardio shows how.
That small tweak taught me a big lesson: your whole body has to be prepared and balanced for what you ask of it. My feet and balance needed to be strong enough to carry me through a new movement, and they weren’t ready yet.
When one link isn’t prepared, that’s where the problem shows up. Smooth movement comes from the whole body matching up, with mobility and balanced strength working together and no weak link. My guide to building strength without injury covers the basics.
Where My Flexibility Came From
I didn’t start with lifting. I came up through Shotokan karate, and complemented it with some mixed martial arts. Those disciplines are full of complex movements through big ranges of motion. They built a foundation of flexibility and body control before I ever touched a heavy barbell.
I explain why that matters in my post on starting with a challenging sport.
The key part: when I switched from martial arts to lifting, I didn’t drop the flexibility work. A lot of people would have. I kept it, and I still do dedicated mobility work once a week, usually on a rest day.
So I never lost the range of motion I built early on. I think that’s a huge part of why my body handles heavy loads without breaking down.
Why I Think Stiffness Gets People Hurt
Here’s what I notice when I train with other lifters. So many of them are stiff, with almost zero flexibility. They’re often impressed by how I move, and that’s the clue.
Think about how injuries actually happen. You move into an angle or a range your body isn’t prepared for, under load, and something complains. Of course it hurts. You’ve asked a stiff joint to do something it has no room to do.
If your body can comfortably reach the positions your lifts demand, with control, there’s far less to go wrong.
That’s why I believe flexibility is the real foundation of injury prevention, more than any single rule about which exercise to do or avoid. A flexible, well-controlled body has room to move safely. A stiff one is one bad rep away from a tweak.
To see how muscles and joints work in each lift, my post on strength training anatomy is a good start.
The Behind-the-Neck Press Example
Here’s a concrete case. I regularly do the behind-the-neck barbell press, a movement most people call a red flag and warn against.
For most people, that warning is correct, and you should take it seriously. It’s risky because most lifters don’t have the shoulder mobility to get into that position safely. Their body compensates and something gets strained.
It’s fine for me because I do have that flexibility and control. That’s exactly my point: the exercise itself isn’t simply good or bad. Whether it’s safe depends on whether your body has the range and control for it.
So please don’t take this as “behind-the-neck press is fine, go do it.” Take it as proof that flexibility is what determines risk. If you don’t have the mobility for a movement, it’s dangerous for you, no matter how safely someone else does it.
How I Actually Warm Up
My warm-up is simple and specific. I do the exercises I’m about to train, but with light weight first. That primes the exact movements and joints I’m going to load.
To plan those light sets, I built a Warm-Up Set Calculator. It gives you a simple set of ramp-up loads leading to your working weight, so you lift prepared.
One thing I’ve learned to avoid: I don’t do static stretching right before lifting. I’ve noticed it weakens me for the heavy work. That is my own experience, and research on this is mixed.
So I save the dedicated stretching for its own slot on a rest day. There it builds my mobility without sapping my strength in a session. Mobility work and warming up to lift are two different jobs, and I keep them separate.
A Simple Weekly Mobility Session
This is a general example, not a program. Pick one rest day each week and give it 15 to 20 minutes.
Work through your hips, hamstrings, calves, chest, and shoulders. Hold each stretch for 30 to 45 seconds and breathe slowly. Ease in until you feel a mild pull, never sharp pain.
Do two rounds if you have time, and don’t force the range. Flexibility comes slowly, so weekly consistency matters more than intensity. I write about that in my post on consistency and patience in natural lifting.
Staying Safe
Stop if you feel sharp pain, numbness, or tingling. If you have an injury, very loose joints, or a medical condition, check with a doctor or physiotherapist first.
Do not copy the behind-the-neck press unless a qualified coach has checked your shoulder mobility. A front press or a dumbbell press is a safer substitute for most lifters. This post shares my personal experience and general information. It is not medical advice.
Who This Approach Suits and Who Should Skip It
It suits lifters who feel stiff, people who sit most of the day, and anyone who wants to keep training heavy for years.
Skip hard stretching if you are recovering from an injury or have very loose joints, until a professional clears you. Also remember that my experience is one person’s. Injury risk depends on sleep, load, technique, and genetics too, so flexibility is part of the picture, not all of it.
What This Means for You
If you lift and you’re stiff, take that seriously, probably more seriously than any single exercise warning. Building and keeping flexibility gives your body the room to handle training safely. Pairing it with balanced strength across your whole body means fewer weak links waiting to fail.
You don’t need a martial-arts background like mine. You just need to work on mobility and not neglect it, because a dedicated session each week goes a long way. Build strength evenly rather than chasing only the lifts you like. My post on smarter core training for lifters covers a part that often gets skipped.
Add some variety so you’re not grinding the same pattern forever. Ease into new movements instead of throwing your body at them cold. I created a Progressive Overload Calculator for this. You enter your last session and get your next weight, your rep target, and a short outlook for the sessions after it.
That’s the whole approach. Stay mobile, build balanced strength, respect new movements, and your body can keep handling heavy training for a very long time. For the long game, see my post on preserving muscle mass as you age.
After more than a decade injury-free, it’s the closest thing to a secret I’ve got, and the flexibility is the heart of it.
