By Josh Mair — Model · Lifter · 13 Years In
This isn't a crash diet. It isn't a 30-day challenge. It's the exact system I've used for over a decade to stay lean, build muscle, and feel my best every single day of the year — no off-seasons, no phases, no starting over.
"Healthy body, Healthy mind, 365."Most people approach fitness in cycles. They get in shape for summer, a holiday, a wedding. Then life happens, motivation fades, and they're back at square one by January. I've never understood that approach — and after 13 years, I never will.
I started tracking my food to the gram at 18. Every meal, every macro, every day. Not because I was obsessive — because I wanted to truly understand what my body needed. Over years, that knowledge became instinct. Today I eat almost entirely by feel, because I built real nutritional knowledge over time.
That's what Lean 365 is. Not a programme you follow for 12 weeks and abandon. A way of living that becomes second nature.
"The people who look good year-round aren't working harder than you. They just stopped stopping."
Josh MairEverything in this guide sits on four foundations. Neglect any one of them and the whole thing falls apart. Most people only focus on two — training and nutrition. That's why most people plateau.
Training
Consistent, progressive lifting is the engine of this system. Building and maintaining muscle keeps your metabolism elevated and your physique in shape year-round — without relying heavily on cardio.
Nutrition
Food is the variable that determines whether you're lean or not. Not the gym. Not cardio. You cannot out-train a poor diet — and you don't need to if you understand what to eat, how much, and why.
Recovery
The work you do in the gym only counts if your body can repair itself. Sleep, stress management, and rest days aren't weaknesses — they're part of the programme.
Consistency
This is the one no one wants to hear. You don't need the perfect plan. You need a good plan you actually follow, every week, regardless of how you feel. That's it.
"A good plan followed consistently will always beat a perfect plan followed occasionally."
The Lean 365 PrincipleFive days a week. Push, pull, legs, upper, lower. This is the split I've used to build and maintain my physique.
A note on cardio: I personally do minimal cardio. I've built enough muscle over 13 years that my body burns a significant number of calories just existing. If you're earlier in your journey, you'll likely need to incorporate some form of cardio. 10,000 steps per day is underrated, sustainable, and works. 20–30 minutes of steady state after lifting 2–3 times per week is more than enough.
Your Weekly Split
Session Breakdown
Push Day — Chest · Shoulders · Triceps
Pull Day — Back · Biceps · Rear Delts
Leg Day — Full Lower Body
Upper Day — Compound Focus
Lower Day — Compound + Accessory
"Progressive overload is non-negotiable. If you're not adding weight, adding reps, or improving form over time — you're maintaining, not building."
Training PrincipleNutrition is the variable that controls everything. You can train perfectly and still carry excess body fat if your diet isn't right.
Track everything to the gram first. Use a food scale, use an app, be meticulous about it for six to twelve months. After 13 years of tracking, I now eat almost entirely by feel. You can get there too — but you have to put in the groundwork first.
"Track your food until you don't need to anymore. That's how intuition is built — not guessed."
Josh MairWhat Josh Actually Eats — A Real Day
Morning — Fuel & Protein
70g oats, 1 scoop whey protein, 50g blueberries, 1 whole banana, 10g honey.
CarbsProteinFibreMid-Morning — Protein Dense
2 slices sourdough, 4 whole eggs, 1 Arla protein yoghurt. Keep the yolks.
ProteinHealthy FatsSlow CarbsAfternoon — Main Meal
200g sweet potato, 200g 5% beef mince, 100g mixed vegetables. This is the template meal — swap the protein, carb, or veg to keep it interesting.
ProteinComplex CarbsMicronutrientsEvening — Satiety & Recovery
200g Skyr yoghurt, 1 scoop whey, 50g blueberries, 2 squares dark chocolate, 15g peanut butter.
CaseinHealthy FatsRecoveryOne of the biggest reasons people fall off their nutrition is eating food they don't enjoy. Enter your favourite foods below and get personalised meal ideas built around them — high protein, clean, and actually worth eating. Add up to 4 foods and hit generate.
Your favourite foodsBuilding your personalised meal plan...
The Core Nutrition Rules
People underestimate recovery almost universally. They train hard, eat well, then stay up until 1am and wonder why they're not progressing.
Sleep is your most powerful tool
Aim for 7–9 hours per night. Consistently poor sleep raises cortisol, increases appetite, reduces testosterone, and makes staying lean significantly harder — regardless of how good your training and nutrition are.
Stress management matters more than you think
Chronic stress elevates cortisol, promotes fat storage around the midsection, and impairs recovery. Daily walks, time away from screens, and hobbies outside the gym all play a role.
Rest days are training days
Two rest days per week are built in. Hitting 10,000 steps on rest days keeps your daily calorie burn elevated without impeding recovery.
Alcohol and late nights cost more than you think
A lifestyle built around regular late nights and alcohol damages sleep quality, recovery, and the food choices that tend to follow. Be honest with yourself about the cost of your habits.
"The gym is where you create the stimulus. Everything outside the gym is where your body actually improves."
Recovery PrincipleThis is the section most fitness guides skip. It's also the section that determines whether everything else works for you.
"If something is a big enough priority to you, you won't fall off. A bad week doesn't happen to people who've made this non-negotiable."
Josh MairStop waiting for motivation
Motivation is a feeling. Feelings are temporary. You will not feel motivated every morning. That's normal — and irrelevant. You go anyway. Discipline is doing what you need to do even when you don't feel like it.
Stop treating a bad day as a failed week
Missing one meal doesn't make it a bad nutrition day. The ability to reset within 24 hours is what separates consistent people from people stuck in cycles. One bad meal is one meal. Get back on it immediately.
Travel, holidays, and life are part of the plan
I travel. I go on holiday. None of these derail me because I've built habits strong enough to survive interruption. Imperfect consistency over years beats perfect consistency for three months, every time.
The identity shift is everything
At some point, this stops being something you do and starts being something you are. You're not someone trying to get fit — you're someone who trains and eats well. Work toward that identity.
Twelve weeks built around the Lean 365 principles — designed to establish consistent training, set your nutrition baseline, and start reshaping your body in a way that lasts.
| Week | Training Focus | Nutrition Goal | Cardio |
|---|---|---|---|
| 1 | Lifting Learn the split. 3 sets. Form over everything. | Start tracking. Hit protein target daily. | 10k steps daily |
| 2 | Lifting Add one set per exercise. Log weights used. | Review calories. Establish TDEE baseline. | 10k steps daily |
| 3 | Lifting Increase at least one weight on each movement. | Create modest calorie deficit if needed. | Steps + optional 20min ×2 |
| 4 | Lifting Full 4 sets on compounds. Lighter Friday. | Review — hitting protein? Adjust if needed. | 10k steps daily |
| 5–6 | Lifting Phase 2. Increase weight across all main lifts. | Tighten tracking. Meal prep for consistency. | 2–3 sessions/week, 20–25 min |
| 7–8 | Lifting Drop sets on isolation exercises. | Adjust calories if plateau reached. | 2–3 sessions/week, 25 min |
| 9–10 | Lifting Phase 3. Superset isolation pairs. | Consistent — no weekends off mentally. | 3 sessions/week, 25–30 min |
| 11–12 | Lifting Peak phase. Push every session. Track PRs. | Final push. Stay in deficit. Trust it. | 3 sessions/week, 30 min |
Everything you need at a glance.
Nutrition Cheat Sheet
Daily Habits Checklist
Josh Mair — @joshmair96
"Healthy body,
Healthy mind,
365."