Resources — How Muscle Growth Actually Works
Welcome to the resources page for How Muscle Growth Actually Works. Everything below is curated to go alongside the guide.
Your Free Worksheet
The companion worksheet to How Muscle Growth Actually Works is yours to print and use as long as you need it. It includes baseline measurements, weekly training log, nutrition scorecard, sleep tracker, 90-day action tracker, and monthly reflection prompts.
Download the Muscle Growth Worksheet →
Already inside your purchased PDF as a clickable link.
Free Evidence-Based Resources
These are the most rigorous, non-commercial sources for training and nutrition information.
Examine.com
Independent, evidence-based research summaries on supplements and nutrition. Most of the supplement industry's marketing falls apart against their analyses. examine.com
Stronger by Science
Greg Nuckols and team. Research reviews, free training programs, and deep-dive articles on training science. The most trusted source in evidence-based lifting. strongerbyscience.com
MASS Research Review
Monthly research review by PhDs in exercise science. Subscription-based, but their free articles and podcast are excellent. massresearchreview.com
USDA FoodData Central
Free official database of nutritional content for thousands of foods. The source of truth for protein, calorie, and micronutrient data. fdc.nal.usda.gov
Academy of Nutrition and Dietetics — Find a Dietitian
If you want personalized nutrition guidance for muscle building, a registered dietitian (RD/RDN) is the right professional. eatright.org/find-a-nutrition-expert
Recommended Books
The Muscle and Strength Pyramid: Training — Eric Helms et al.
Written by drug-free natural pro bodybuilder and PhD candidate. The most rigorous training book in the natural lifting space. Covers programming systematically. Find it on Bookshop.org
Renaissance Diet 2.0 — Mike Israetel et al.
PhD sport physiologist on evidence-based nutrition for muscle gain and fat loss. Less hype than most diet books, more science. Find it on Bookshop.org
Starting Strength — Mark Rippetoe
The classic novice strength program. Some of the methodology is debated, but the focus on the main barbell lifts is foundational. Best paired with newer programming research. Find it on Bookshop.org
Bigger Leaner Stronger — Michael Matthews
Beginner-friendly, evidence-based introduction to lifting and nutrition. Practical and accessible for first-year lifters. Find it on Bookshop.org
Note: Book links go to Bookshop.org. These are not affiliate links — we don't earn a commission. Find any of these at your local library for free.
Free Programs
You don't need a paid program to make progress. These free programs have helped millions of beginners.
Stronger By Science — Free Programs
Free, evidence-based training programs for beginners through advanced lifters. The "Reps to Failure" calculator is a particularly useful free tool. strongerbyscience.com/programs
Reddit r/Fitness Wiki — Beginner Routines
Community-curated list of well-vetted beginner programs (Starting Strength, StrongLifts 5x5, GZCLP, PPL, etc.) with honest pros and cons of each. reddit.com/r/Fitness/wiki/getting-started
Boostcamp App
Free app with dozens of evidence-based programs from coaches like Jeff Nippard and Greg Nuckols. Solid replacement for paying for a custom program. boostcampapp.com
Tools & Apps
Strong (or Hevy)
Workout tracking apps with free tiers. Log every set, every workout, every progression. Essential for progressive overload. strong.app • hevyapp.com
MyFitnessPal or Cronometer
Calorie and protein tracking apps. MyFitnessPal has the largest food database; Cronometer is more accurate for micronutrients. Both have free tiers. myfitnesspal.com • cronometer.com
MacroFactor
Paid macro-tracking app (~$12/month) that adjusts your targets weekly based on your actual progress. Worth it if you're serious about body composition. macrofactorapp.com
Curated Video Lessons
How to Build Muscle — The Science — Jeff Nippard
Drug-free natural bodybuilder and exercise scientist with rigorous evidence-based content. Watch on YouTube
Hypertrophy Explained — Renaissance Periodization (Mike Israetel)
PhD sport physiologist on the actual mechanisms of muscle growth. Watch on YouTube
Progressive Overload — The #1 Principle — Jeff Cavaliere (ATHLEAN-X)
Physical therapist explains the most important principle in training. Watch on YouTube
How Much Protein Do You Really Need? — Layne Norton, PhD
PhD nutritional sciences researcher on actual protein requirements. Watch on YouTube
Are Supplements Worth It? — Examine.com
Independent supplement research summary — what works, what doesn't. Watch on YouTube
Continue Your Knowledge Stack
The rest of the Fitness library and the Health & Body library both build on this:
Browse Fitness → • Browse Health & Body →
Muscle growth doesn't exist in isolation. Sleep, nutrition, and stress all affect what you build.
This page is a free companion to the How Muscle Growth Actually Works PDF. All links above are to free or third-party resources. We do not earn a commission on any link on this page. This guide is education, not medical advice. Consult a doctor before beginning any new exercise program. Last updated May 2026.