Andy Galpin (exercise physiologist) and Layne Norton (nutrition scientist, powerlifter) side by side: how they train, eat, supplement and sleep, how strong the evidence is, and how to build a plan from either or both.
Training splits are our estimates from each expert’s published routine. Following checked October 2026.
The key differences
Norton puts more of the week into strength: about 65% against 50%.
In plans in their style, Galpin's hard sessions are 4-minute intervals (Norwegian 4 × 4); Norton's are 1-minute intervals.
We rate the overall evidence behind both protocols as strong.
Supplements that go into a plan: Galpin, creatine monohydrate, caffeine before training; Norton, creatine monohydrate, whey protein, caffeine before training. Prescription items and personal stacks stay out of every plan.
Neither has a separate mobility routine; plans add 10 minutes a day of basics.
Protocols side by side
Each line is rated for the evidence behind it. “Doctor only” items never go into a plan.
Training
Andy Galpin
Strength: the 3–5 rule – 3–5 exercises, 3–5 sets of 3–5 reps, 3–5 minutes' rest, 3–5 days a week, every rep done with full intentStrong evidence
Muscle growth: at least 10 hard sets per muscle group a week, each within 1–2 reps of failure; 15–20 sets for more experienced liftersStrong evidence
Add load gradually for strength, roughly 3–5% a week, and keep the same main exercises for about 6–12 weeks before changing themSome evidence
Moderate, conversational-pace cardio of about 150–200 minutes a week for general healthStrong evidence
Warm up for about 5–7 minutes, up to 10 if you are stiff or olderPersonal habit
Run a simple fitness test battery about once a year (for example grip strength, jumps, push-ups and an estimate of VO2 max) and retest weak areas more oftenSome evidence
Layne Norton
Lift weights consistently, year after year, and take sets close to failureSome evidence
Exercise improves health markers even when it does not change your weightStrong evidence
Track daily steps while dieting: everyday movement tends to drop as calories fallSome evidence
His PHAT programme: 5 days a week, two heavy 'power' days plus three higher-rep hypertrophy daysPersonal habit
Eating
Andy Galpin
Total daily protein matters more than exact timing around workoutsSome evidence
Daily fluid baseline of about 30 ml per kg of body weightPersonal habit
During training: drink about 2 ml per kg of body weight every 15–20 minutes; afterwards replace about 125% of the weight lostSome evidence
For long or very hard sessions, start at about 60 g of carbohydrate per hourStrong evidence
Layne Norton
Track calories and protein; food labels can be ~20% off, but consistent tracking still shows your true intake over timeSome evidence
Weigh yourself each morning and compare weekly averages, not single daysSome evidence
Protein about 1.6 g/kg a day; up to ~2.2 g/kg when dieting or very leanStrong evidence
Choose a diet style you can sustain; low-carb and low-fat work equally well with calories and protein matchedStrong evidence
Fibre about 15 g per 1,000 kcalSome evidence
Seed oils are fine: replacing saturated fat with polyunsaturated fat lowers LDL and heart riskSome evidence
Supplements
Andy Galpin
Creatine monohydrate 3–5 g a day; larger people may need moreStrong evidence
Creatine takes about 3–4 weeks to saturate muscle at normal doses; a loading phase is optionalNote
Caffeine about 1–3 mg per kg roughly 30 minutes before exercise; performance tends to drop above about 5 mg per kgStrong evidence
Layne Norton
Tier 1 – creatine monohydrate 3–5 g a day; loading is optional; timing does not matterStrong evidence
Tier 1 – whey protein 20–40 g per serving (about 2–3 g leucine) to help reach daily proteinStrong evidence
Tier 1 – caffeine 3–6 mg/kg about 45–60 min before training; lower doses still help alertnessStrong evidence
Sleep & recovery
Andy Galpin
After training, lie down for 3–10 minutes with eyes covered and breathe slowly through the nose (for example box breathing) to switch into recovery modeSome evidence
Cold-water immersion can ease soreness but may blunt muscle growth, so keep it away from strength sessions if muscle is the goalSome evidence
Hot baths for next-morning stiffnessPersonal habit
Pair one physical recovery tool (compression, light movement, a swim) with one breathing practice rather than chasing every gadgetPersonal habit
Watch three markers – performance, physiology (resting heart rate, HRV) and how you feel; five or more days of decline is a sign to back offSome evidence
Layne Norton
Avoid caffeine late in the day; it can harm sleep even if you fall asleep normallyStrong evidence
Carb timing matters little on average; if carb-heavy meals make you sleepy, move themNote
Poor sleep and unmanaged stress are bigger problems than small nutrition detailsNote
Weak spots to know
Andy Galpin
Much of his detailed advice (hydration formulas, carbohydrate per hour, caffeine dosing) is built for athletes and hard training; it needs scaling down for most adults over 50.
Several recovery tools he discusses, such as compression, cold and heat, have modest or mixed evidence, and he himself notes cold immersion may reduce muscle gains.
His fitness-test benchmarks are practical rules of thumb rather than age-adjusted clinical norms.
Layne Norton
Commercial ties: he co-founded Outwork Nutrition, which sells whey protein and products containing creatine — overlapping with his Tier 1 list — and co-founded the paid Carbon Diet Coach app and the BioLayne coaching business. He has also disclosed past research funding from the National Dairy Council, the National Cattlemen's Beef Association and the Egg Board.
Reverse dieting, which he helped develop and popularise, had no published controlled trials supporting it as of 2021; its use rests mainly on coaching experience.
His relaxed view of seed oils is contested by others in the health space. On The Drive (2026), Peter Attia presented the strongest case against seed oils for a debate after the booked guest declined, while saying his own view is close to Norton's; debate continues over older trials and LDL oxidation.
Build a plan from Galpin, Norton or both
Your free plan shows a week of gym sessions, cardio, a day of eating, supplements and mobility, fitted to your age, time and health.
What is the main difference between Andy Galpin and Layne Norton?
Their training split differs most in strength: Galpin about 50%, Norton about 65% (our estimate from their published routines). Galpin's signature habit is “3–5 rule” lifting; Norton's is Tiered supplements.
How much protein do Galpin and Norton recommend?
Galpin: Daily total matters most. Norton: 1.6–2.2 g/kg.
Whose advice has stronger evidence?
We rate the overall evidence behind both protocols as strong.
Do Galpin and Norton disagree?
Not directly in what we reviewed. Their differences are in emphasis: norton puts more of the week into strength: about 65% against 50%.
Can I combine Galpin and Norton?
Yes. In Build my mix you choose one expert per area, for example one for strength and another for eating. Your free plan shows the result straight away.