The Knowledge
Build muscle.
Backed by science.
Everything you need to grow, recover, and fuel — distilled from the latest meta-analyses and current research from Schoenfeld, Helms, Israetel, Nuckols, and more. No fluff.
Calculator
Find your maintenance calories
BMR (resting)
1790 kcal
Maintenance (TDEE)
2774 kcal
Cut (-500)
2274
~1 lb / week loss
Lean Bulk (+300)
3074
~0.5 lb / week gain
Daily protein target
144g
~0.8 g/lb bodyweight — the upper end of what research shows benefits muscle growth.
Formula: Mifflin–St Jeor (most accurate predictive equation in current literature). Adjust by ±200 kcal after 2 weeks based on the scale.
Training
How to lift for growth
Sets per muscle / week
10–20 hard sets per muscle per week is the proven hypertrophy sweet spot (Schoenfeld 2017, 2024 meta-analyses).
Beginners grow on 8–10. Advanced lifters need closer to 16–22. More than 25 usually adds fatigue, not muscle.
Reps & loads
5–30 reps all build muscle when taken to within 0–3 reps of failure (Schoenfeld 2017).
Best practical range: 6–12 reps for most sets. Mix in heavy 3–6s and high-rep 15–20s to recruit every fiber type.
All three fiber phases
Muscle is built of slow-twitch (Type I) and fast-twitch (IIa, IIx) fibers. Each prefers a different stimulus:
Heavy (3–6 reps): max IIx recruitment + tendon/CNS strength.
Moderate (8–12): the bulk of hypertrophy.
High (15–25): Type I + metabolic stress + capillary density.
Rest between sets
2–4 minutes on compounds, 1–2 minutes on isolations.
Short rest hurts volume and growth (Schoenfeld 2016). Don't rush to feel "the burn" — rest enough to hit your target reps with quality.
Effort: proximity to failure
Train with RIR 0–3 (reps in reserve). Stopping too far from failure under-stimulates growth.
On compounds (squat, deadlift) keep 1–3 RIR for safety. On isolations, push the last set to true failure.
Prioritized muscles
Most lifters under-train: side delts, hamstrings, upper back, calves, biceps long head.
Most over-train: chest, front delts, quads. Audit your weekly set count by muscle — not by exercise.
Best split (for most)
Upper / Lower 4x or Push / Pull / Legs 5–6x.
Hit each muscle 2x per week — the meta-analyses show this beats 1x at equal volume.
Progressive overload
Add reps, then load, then sets — in that order. Double progression (e.g. 8→12 reps, then add weight) is the simplest proven model.
Track your top set every session. If nothing went up in 3 weeks, eat more, sleep more, or deload.
Deloads
Every 4–8 weeks: cut volume in half for one week. You won't lose muscle — you'll come back stronger.
Nutrition
Eat to grow
Protein
0.7–1.0 g per lb bodyweight daily (Morton 2018 meta-analysis caps benefit near 0.73 g/lb / 1.6 g/kg).
Spread across 3–5 meals, ~30–50g per feeding to max muscle protein synthesis.
Carbs
2–3 g per lb on training days. Carbs fuel performance, replenish glycogen, and improve insulin sensitivity.
Most should come from rice, oats, potatoes, fruit, sourdough — not engineered junk.
Fats
0.3–0.5 g per lb. Don't go below 20% of calories — fat drives testosterone and absorption of A/D/E/K.
Prioritize: olive oil, eggs, fatty fish, avocado, nuts.
Calorie targets
Bulk: +200 to +400 kcal over TDEE. Aim for 0.25–0.5% bodyweight gain / week.
Cut: 300–600 kcal deficit. Lose 0.5–1% bodyweight / week to preserve muscle (Helms 2014).
Recomp: at maintenance, only works for beginners, returners, or people in calorie surplus from protein.
Insulin sensitivity
Heavy lifting drastically improves insulin sensitivity — muscle is the body's largest glucose sink.
Time the bulk of your carbs around training (pre + post). It improves performance, recovery, and partitioning toward muscle vs fat.
Walk 8–10k steps daily. Cardio 2–3x/week (zone 2). Sleep 7–9 hrs. All compound this effect.
Micros & water
Hit 30g+ fiber, eat fruit + vegetables every day, salt your food.
Water: ~half your bodyweight in oz. Add electrolytes (sodium, potassium, magnesium) if you sweat hard.
Supplements that actually work
Creatine monohydrate — 5g/day. Most studied supplement in history. ~5–10% strength + lean mass over months.
Caffeine — 3–6 mg/kg pre-workout. Strength + endurance boost.
Vitamin D, omega-3, whey — fill nutrition gaps. Skip the rest.
Meal timing
Total daily intake matters most. But: a protein feeding within ~2 hrs of lifting and another within ~4 hrs after slightly improves growth.
Don't skip breakfast if you train AM. Don't crush a huge meal right before lifting.
The 80/20 rule
80% whole, single-ingredient foods. 20% whatever fits your macros and keeps you sane.
Adherence beats optimization. The best diet is the one you'll actually run for years.
Recovery
Where the gains actually happen
Sleep
7–9 hours. One night under 6 cuts MPS, testosterone, and insulin sensitivity for days.
Cool, dark room. No screens 30 min before bed. Same wake time daily.
Step count & cardio
8–10k steps daily improves recovery, appetite, and body comp without interfering with lifting.
2–3 zone-2 sessions / week (heart rate ~60–70% max) — better cardio without crushing recovery.
Stress management
Chronic stress = elevated cortisol = impaired recovery and fat loss.
Sunlight in the morning, walks outside, lift 4–6x/wk — these regulate the nervous system more than any supplement.
Soreness ≠ growth
Soreness is novelty + damage, not the goal. You can grow with zero soreness if volume + intensity + frequency are dialed in.
Frequency vs Volume
If a muscle is sore for 4+ days, you're either doing too much per session or not training it often enough.
More frequency at lower per-session volume usually wins.
Track 4 numbers
1) Bodyweight (weekly avg). 2) Top set on key lifts. 3) Sleep hours. 4) Daily protein.
If those four are moving correctly, you'll grow. If they aren't, fix them before changing anything else.
TL;DR
The whole game in 7 lines.
- → Lift 4–6x/wk, hit each muscle 2x.
- → 10–20 hard sets per muscle / week.
- → Mix heavy (3–6), moderate (8–12), high (15–25) reps.
- → Stop 0–3 reps from failure on most sets.
- → 0.8 g protein / lb. Carbs around training. Eat real food.
- → Sleep 7–9 hrs. Walk daily. Manage stress.
- → Track bodyweight, top sets, sleep, protein. Adjust monthly.