What is the Forever Fit book about?

Forever Fit is a book by Maxime Sigouin, founder of Mavy Wellness, about how adults over 50 can lose body fat, build muscle and stay strong for life on a whole food plant based diet. Its core idea: whole food plant based eating is great for your health, but it isn't focused on body composition, so you also need enough protein and strength training.

The book lays out the five phase Forever Fit Blueprint:

1. Body recomposition. Slow fat loss, about half a pound to one pound a week, while keeping muscle.

2. Reverse dieting. Gradually adding calories back, which Maxime calls the most underused and most essential phase.

3. Lean muscle building. A slight surplus and heavier lifting for 6 to 12 months.

4. Maintenance and intuitive eating. Keeping results without constant tracking.

5. The athletic phase. New challenges, races and goals.

It also covers how to set your calories and protein, how to start strength training three times a week, why daily movement matters, and real stories from clients in their sixties and seventies.

What the research says. A 2018 review of 49 studies in the British Journal of Sports Medicine found that protein helps resistance training build muscle, with the benefit leveling off around 1.6 grams per kilogram of body weight a day. [1] In a 2017 New England Journal of Medicine trial of 160 adults over 65 who were losing weight, those who did resistance training kept more of their lean muscle than those who only did aerobic exercise. [2]

Watch on the Forever Fit Podcast: My New Book Forever Fit Is Now Live (Ep. 425)

"Forever Fit gives you everything you need to excel in your athletic endeavors and achieve the best of health simultaneously. Maxime Sigouin packs evidence-based science, integrity, and compassion into this volume."

Neal D. Barnard, MD, FACC, Adjunct Professor of Medicine, President of the Physicians Committee for Responsible Medicine, on Forever Fit

Get the book at mavywellness.com/foreverfitbookoffer. To have a coach apply the method for you, book a call with our team at mavywellness.com.

Sources

1. Morton RW et al. (2018). A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. British Journal of Sports Medicine 52(6):376-384. https://pubmed.ncbi.nlm.nih.gov/28698222/

2. Villareal DT et al. (2017). Aerobic or resistance exercise, or both, in dieting obese older adults. New England Journal of Medicine 376:1943-1955. https://pubmed.ncbi.nlm.nih.gov/28514618/

About the author. Maxime Sigouin is the founder of Mavy Wellness (formerly FitVegan Coaching) and the author of Forever Fit, a book endorsed by physicians including Neal D. Barnard, MD, Laurie Marbas, MD, and James F. Loomis, MD. He has coached for more than six and a half years and, with his team, has coached nearly 1,300 adults over 50 on a whole food plant based diet. He hosts the Forever Fit Podcast, with more than 450 episodes.

Last updated: October 19, 2026. This page is for general education and is not medical advice. Check with your doctor before starting a new exercise or nutrition program.