How often
From our Mike Israetel profile
Israetel says two short sessions a week give most of the benefit for most people; Attia trains strength 3–5 times a week.
Compare experts › Peter Attia vs Mike Israetel
Peter Attia vs Mike Israetel
Peter Attia (physician) and Mike Israetel (sport physiologist (phd)) 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.
Words explained (13)
- Zone 2
- Steady cardio at a pace where you can still talk in full sentences, but not sing.
- VO2 max
- The most oxygen your body can use in hard exercise. A good measure of fitness; higher is better.
- Intervals
- Short hard efforts with easy recovery in between, such as 30 seconds fast, 90 seconds slow.
- 4 × 4
- Four rounds of 4 minutes hard with 3 minutes easy in between. Also called Norwegian intervals.
- Hypertrophy
- Muscle growth.
- Hinge
- A movement that bends at the hips with a straight back, like a deadlift or picking a box up from the floor.
- Mobility
- Moving your joints freely through their full range.
- Omega-3 (EPA, DHA)
- Healthy fats found mostly in oily fish such as salmon, herring and sardines.
- Time-restricted eating
- Eating all your meals within a set window of the day, for example 8am to 6pm.
- ApoB
- A blood test that counts the particles carrying cholesterol. Linked to heart disease risk.
- Rapamycin, metformin
- Prescription drugs that some experts take hoping to slow ageing. Not proven for that, and never part of your plan.
- Medicine 3.0
- Peter Attia's name for preventing disease early instead of treating it late.
- Centenarian
- Someone aged 100 or older.
At a glance
| Measure | Peter Attia | Mike Israetel |
|---|---|---|
| Background | Physician | Sport physiologist (PhD) |
| Training split | 40% strength · 40% aerobic · 10% intervals · 10% mobility | 65% strength · 25% aerobic · 5% intervals · 5% mobility |
| Signature habit | Zone 2 + VO2 max | 2 × 30 min, close to failure |
| Protein | 1.6–2.2 g/kg | No fixed target |
| Training style | Balanced | Muscle-building |
| Overall evidence | Strong | Solid |
| Following | Instagram 1.6M · YouTube 1M | YouTube 3.9M |
Training splits are our estimates from each expert’s published routine. Following checked October 2026.
The key differences
- Israetel puts more of the week into strength: about 65% against 40%.
- Attia puts more of the week into aerobic base (zone 2): about 40% against 25%.
- In plans in their style, Attia's hard sessions are 4-minute intervals (Norwegian 4 × 4); Israetel's are 1-minute intervals.
- We rate the evidence behind Attia's protocol higher: strong, against solid for Israetel.
- Supplements that go into a plan: Attia, omega-3; Israetel, none (food first). Prescription items and personal stacks stay out of every plan.
- Only Attia has a mobility or movement routine of their own.
Where they disagree
Protocols side by side
Each line is rated for the evidence behind it. “Doctor only” items never go into a plan.
Training
Peter Attia
- Zone 2 cardio (a steady pace where you can still talk) about 3 hours a week, for example 4 × 45 min. Start with about 2 hours if new to itStrong evidence
- VO2 max intervals: 4 min hard, 4 min easy, repeated 4–6 times, once or twice a weekSome evidence
- Heavy strength training 3–5 times a week, focusing on grip, slow lowering, pulling and hip-hinge movementsStrong evidence
- Stability and balance work woven into most daysSome evidence
- Benchmarks such as carrying half your body weight in each hand for 1 minute (men; about 75% of that for women) and long dead hangsPersonal habit
- Choose the physical tasks you want to manage at 100 and train toward them nowNote
Mike Israetel
- For the average person, about 30 minutes of training twice a week gives the best return on time.Some evidence
- After 40: most sets in the 10–20 rep range, some at 20–30, and 5–10 reps only rarely, because heavy low-rep sets raise the risk of injury.Some evidence
- Train each muscle twice a week, starting with 1–2 hard sets per muscle per session, and add a set the next week if you recovered well.Some evidence
- Lower the weight slowly and pause for 1–2 seconds at the bottom.Some evidence
- Warm up more: three warm-up sets (light, medium, heavier) before the first working set, and 1–2 before each later exercise.Personal habit
- Add weight in small steps: rarely more than about 2.5 kg or one rep per set at a time.Personal habit
- Choose joint-friendly exercises with a high stimulus, for example a hack squat instead of a heavy back squat.Some evidence
- Take a planned easy week every 4–6 weeks, and a lower-volume month about every 5 months.Personal habit
Eating
Peter Attia
- Protein at least 1.6 g per kg of body weight a day. About 2.2 g/kg is the better target for active people with healthy kidneysSome evidence
- Spread protein across about four meals of roughly 40–50 gPersonal habit
- Follows no named diet. Focuses on energy balance and avoiding junk foodNote
- Doubts time-restricted eating as a general tool and saves longer fasts for specific patientsNote
- Says alcohol has no biochemical benefit. Personally keeps it to 0–8 drinks a week, at most 2 a dayPersonal habit
Mike Israetel
- If you want to gain muscle, only gain weight when you are lean: about 0.25 kg a week for 4–8 weeks, then a fat-loss phase.Personal habit
- Stay under about 20% body fat while gaining, come back to about 15% afterwards, and get blood tests after gaining phases.Personal habit
Supplements
Peter Attia
- Fish oil reported at about 2 g EPA + 1.5 g DHA a day, aiming for a blood omega-3 level of about 8–12%Some evidence
- Vitamin D, reported at about 5,000 IU a dayPersonal habit
- Magnesium from several forms, about 1 g elemental a day in total (reported)Personal habit
- Methylfolate and vitamin B12 to keep homocysteine below about 9 µmol/L, based on blood testsDoctor only
- Prescription drugs such as statins or PCSK9 inhibitors to lower apoB when neededDoctor only
- Treats rapamycin and metformin as unproven, experimental options, not general adviceNote
Mike Israetel
No specific guidance in what we reviewed.
Sleep & recovery
Peter Attia
- Allow 8–9 hours in bed with a fixed wake-up timeStrong evidence
- Cool, dark bedroom, about 18 °CSome evidence
- No food in the last three hours and no alcohol close to bedtimeSome evidence
- Screens off well before bed. He keeps a second phone with no social appsPersonal habit
- Sleep aids he has reported using: glycine, ashwagandha and magnesium L-threonate. Melatonin only for jet lagPersonal habit
Mike Israetel
No specific guidance in what we reviewed.
Stress & mind
Peter Attia
- Treats emotional health as a pillar as important as physical healthNote
- Journaling as a regular practicePersonal habit
- Keeps social media off his evening phone to protect wind-down timePersonal habit
Mike Israetel
No specific guidance in what we reviewed.
Brain health
Peter Attia
- Regular dry sauna (Outlive cites about 4 × 20 min a week at 80 °C or more, linked in Finnish studies to lower dementia risk)Some evidence
- Sees ketogenic eating as a possible alternative brain fuel in early cognitive decline, based on small trialsSome evidence
- Says the benefit of vitamin D for dementia risk is unclearNote
Mike Israetel
No specific guidance in what we reviewed.
Weak spots to know
Peter Attia
- Many of his exercise targets lean on observational studies that link fitness or strength to longer life. These show association, not proof that hitting a given number will add years.
- A 2026 review in the Australian Journal of General Practice called the book's research base superficial. It said his intensive, personalised approach suits only a few affluent people, and that routine full-body MRI scans use a lot of resources and bring risks from incidental findings that the book does not discuss.
- Some critics argue that the medications and screening tests he recommends for healthy people lack strong trial evidence, and that the risks could outweigh the benefits.
Mike Israetel
- Most of his content is aimed at bodybuilders and younger lifters; advice for people over 40 is a smaller part of it.
- Many specific numbers, such as when to take easy weeks or how fast to add sets, are coaching rules of thumb rather than findings from trials.
- He sells training programmes and diet products through RP, the company he co-founded.
Build a plan from Attia, Israetel 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.
Questions
What is the main difference between Peter Attia and Mike Israetel?
Their training split differs most in strength: Attia about 40%, Israetel about 65% (our estimate from their published routines). Attia's signature habit is Zone 2 + VO2 max; Israetel's is 2 × 30 min, close to failure.
How much protein do Attia and Israetel recommend?
Attia: 1.6–2.2 g/kg. Israetel: No fixed target.
Whose advice has stronger evidence?
We rate the evidence behind Attia's protocol higher: strong, against solid for Israetel.
Do Attia and Israetel disagree?
Yes, on how often. See "Where they disagree" on this page.
Can I combine Attia and Israetel?
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.
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Full sources are on each profile: Peter Attia · Mike Israetel. Reviewed October 2026.