After 50, the split squat beats the barbell back squat
In short
Muscle still grows after 50, but exercise selection changes. Bryan Krahn, C.S.C.S., a coach of two decades who is himself over 50, puts one rule first — avoid injuries — and the three lifts he selects on that basis are the dumbbell row (3 sets of 8–10 per arm), the pushup (3 sets of 12–15), and the split squat (3 sets of 6–8 per side). Replacing the bilateral barbell back squat with a unilateral split squat is the key substitution: it builds muscle and strength while training balance and mobility, without loading the spine directly.
Your ability to build muscle has no hard expiration date. It comes easier young, yes — but your thirties are not the end, and neither are your forties or fifties. What changes is not whether it works but how you have to go about it.
Rule one for building muscle at 50 and beyond is simple: avoid injuries. In a body that recovers more slowly, one injury erases months rather than weeks. Which is why the criterion for picking exercises shifts from 'how much stimulus' to 'how little risk per unit of stimulus'.
Why the split squat instead of the back squat?
This is where the bilateral barbell back squat comes out and the split squat goes in. On joints carrying accumulated wear, the whole mechanism of a bar on your back — routing load down through the spine — is expensive. Go unilateral and the stimulus reaching one leg holds while total spinal load falls by more than half. Balance and mobility come along for free, and those get more valuable every year.
Start kneeling, both legs at 90 degrees, torso leaned slightly forward, and pick up the dumbbells. Stand straight up while squeezing the glute, gaze forward and slightly down to hold a neutral spine. The one prohibition on the way down is never letting the knee slam into the floor. Three sets of 6 to 8 per side.
What are the other two?
- Dumbbell row — 3 sets of 8–10 per arm. Any rowing variation is mandatory rather than optional at this age. It builds upper back and lats while honing posture and protecting shoulder health
- Pushup — 3 sets of 12–15. A staple chest builder that is relatively safe and doable anywhere, and it reinforces proper shoulder blade function, which heads off long-term shoulder problems
What the three have in common matters more than the list itself. Horizontal pull, horizontal push, unilateral lower body — the minimum set that covers front, back, and legs, and not one of them loads the spine directly. Programmes get shorter after 50 not out of laziness but because the recovery budget shrank, and a shrinking budget gets cut from the most expensive line first.
So should you quit the big three?
No. This is not about abandoning lifts, it is about where the bulk of your leg volume comes from. Put split squats in the slot that held three weekly back squat sessions, and keep back squats only at the dose that maintains the number.
In muscle index terms the swap is not a loss. The score applies an age coefficient from 40 onward — 1.02 at 40–44, 1.09 at 50–54, 1.20 at 60–64. The same big-three total scores higher as you age. Miss three months to an injury, though, and the total itself drops while the age coefficient does nothing to cover it. Past 50, the reliable way to protect your score is continuity, not load.
Switching to split squats is not a fix for a knee that already hurts. Unilateral work reduces spinal load but concentrates load on one knee. If there is pain, the next step is diagnosis, not exercise substitution.
On what to cut, see lift selection after 50; on working around a cranky knee, knee-friendly leg training.
Frequently asked questions
Can you still build muscle after 50?
Yes. Recovery is slower and joints carry more wear, but the capacity to add muscle has no expiration date. What changes is exercise selection strategy, and the first criterion becomes avoiding injury.
Should you keep barbell back squatting in your fifties?
It is not forbidden, but it is expensive as your main source of leg volume, because a bar on the back routes load through the spine. On worn joints, move most of the volume to unilateral split squats and keep back squats only at the dose that maintains your number.
How many sets and reps of split squats?
Three sets of 6 to 8 per side. Start kneeling with both legs at 90 degrees, lean the torso slightly forward, grab the dumbbells, and stand straight up while squeezing the glute. On the way down, never let the knee slam into the floor.
Which exercises belong in a lifting programme after 50?
Dumbbell row (3 sets of 8–10 per arm), pushup (3 sets of 12–15), and split squat (3 sets of 6–8 per side). Horizontal pull, horizontal push, and unilateral lower body cover front, back, and legs in the minimum number of lifts, and none of the three loads the spine directly.
Won't changing exercises lower your muscle index?
Long term it works the other way. The index applies an age coefficient from 40 onward — 1.02 at 40–44, 1.09 at 50–54, 1.20 at 60–64 — so the same big-three total scores higher with age. An injury that costs three months lowers the total itself, and the age coefficient does not make up the difference.
Source: Men's Health Fitness