Reg Park’s 5X5: the old-school workout that still humbles us
Let me be blunt: the old-school lifters would bury most of today’s “athletes.”
They worked full-time jobs — real jobs, manual labour, not content creation. They trained on rusty iron in cold basements. No pre-workout. No ring light. No science-based guru selling them a €200 PDF. And they built physiques and strength numbers that, fifty years and a billion dollars of supplement marketing later, we still can’t touch. Powerlifting totals. Weightlifting records. Physiques. Go and look — half of them still stand.
Reg Park was one of these men. And the way he trained — a brutally simple 5×5 — is still one of the best programmes ever written. We run a version of it at Momentum to this day.
The 5X5: the meat and potatoes of strength training
In the words of Pavel Tsatsouline, the guy behind kettlebell wizardry and former Spetsnaz physical instructor, 5X5 is like the meat and potatoes of strength training. Whether you're after beastly muscles or raw strength, doing 5 sets of 5 reps is probably your golden ticket.
5X5 is simple, effective, and basically the no-brainer way to go. Heavy compound lifts. Add weight when you earn it. That’s the whole game — and it has quietly outperformed every “revolutionary” system the industry has tried to sell on top of it.
There are a dozen ways to run a 5×5. Our favourite is the original Reg Park formula.
Who was Reg Park?
Reg Park was a formidable figure, securing the title of Mr. Universe three times.
His impressive physique served as inspiration for none other than Arnold Schwarzenegger on his journey into bodybuilding. Weighing 115kg on a 182cm frame and boasting a bench press exceeding 220kg, Park was a true powerhouse.
He embraced a recovery regimen centered around consuming copious amounts of raw milk, red meat, eggs, and liver tablets. His training approach was characterized by simplicity and brutality, focusing on heavy compound lifts during sessions that endured for two to three hours—no time wasted on other non-essential routines.
How did Reg Park train?
Three days a week. Full body every session — the way strong men trained before someone decided your chest needed its own day.
He’d pick four to six lifts and grind them forward week after week: front squats, overhead press, weighted chins, EZ-bar curls, overhead triceps extensions. Five sets each — two heavier warm-ups, then three working sets of five at the same weight.
Hit all three fives? The weight goes up. Miss them? You stay until you earn it. No autoregulation app, no RPE debate, no feelings. The bar tells you the truth.
Simple. Never easy.The bottom line
How we run Reg Park’s 5X5 at Momentum
At Momentum, we implement Reg Park’s 5X5 in phases with increased intensity to foster functional hypertrophy in slightly advanced clients who have achieved structural balance and sufficient strength gains.
Functional hypertrophy represents the sweet spot of intensity where both neuromuscular strength and hypertrophy are developed. Consequently, clients not only gain strength but also experience an increase in the contraction component of their muscle mass.
Functional hypertrophy is the sweet spot: enough load to build serious neural strength, enough volume to add contractile muscle. You don’t just get bigger. You get bigger and harder to kill.
A sample block, three sessions. Watch the tempos — the four digits set how long each phase of the rep takes, and that’s where the magic and the misery live.
Session A
A1. Front squat — 3 × 5, 4010, 180s
B1. Flat bench, wide grip — 3 × 5, 4010, 120s
B2. T-bar row, pronated — 3 × 5, 3012, 120s
C1. Incline back extension — 3 × 10–12, 3012, 60s
C2. Decline sit-up — 3 × 12–15, 3010, 60s
Session B
A1. Safety-bar squat — 3 × 5, 4201, 180s
B1. Incline bench, wide grip — 3 × 5, 4010, 120s
B2. Chin-up, supinated grip — 3 × 5, 3012, 120s
C1. Seated row to neck — 3 × 10–12, 3012, 60s
C2. Lying DB triceps extension — 3 × 10–12, 3010, 60s
Session C
A1. Conventional deadlift — 3 × 5, 4201, 180s
B1. Barbell overhead press — 3 × 5, 4010, 120s
B2. Pull ups — 3 × 5, 3012, 120s
C1. Walking lunges — 3 × 16–20, 3010, 60s
D1. Weighted dips — 3 × 6-8, 3010, 60s
Reg’s skeleton — heavy fives on the big lifts — with tempo and accessory volume layered on to control quality and hammer the weak links shut.
The part nobody wants to hear
Reg Park built a three-time Mr. Universe body on rusty iron, heavy fives and a diet of milk and meat — while holding down a job. Most people today have better equipment, better food, and infinitely better information. And worse results.
The methods didn’t get worse. The people did. We complicated the simple, outsourced the hard part to an app, and confused buying kit with doing the work. The old-school greats understood what the industry has spent fifty years trying to make you forget: pick the right lifts, add weight over time, and show up long enough for it to count.
But heavy fives are a loaded gun. Three sets of five on a deadlift only build the lifter whose structure can take it. Put that load on a body that isn’t ready and you won’t build it — you’ll break it.
That’s why we measure before we load. Strength, movement, structural balance, your real numbers — on the table before you touch a programme like this. Train like the greats. Just earn the right first.