Best Fitness Books, Ranked

Most "best fitness books" lists are one person's opinion. This one is data: the top 25 books from the 64 fitness thought leaders we track, ranked by Amazon readership — and every author carries a Modern Mentor AI credibility rating, so you can see who actually deserves your reading time. Updated as ratings and our author roster change.

1. 1
   

   The Obesity Code: Unlocking the Secrets of Weight Loss (Why Intermittent Fasting Is the Key to Controlling Your Weight)

   by Dr. Jason Fung · credibility 567/1000

   4.6· 35,346 Amazon ratings

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2. 2
   

   Complete Guide To Fasting: Heal Your Body Through Intermittent, Alternate-Day, and Extended Fasting

   by Dr. Jason Fung · credibility 567/1000

   4.6· 24,968 Amazon ratings

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3. 3
   

   The Plant Paradox: The Hidden Dangers in "Healthy" Foods That Cause Disease and Weight Gain

   by Dr. Steven R Gundry · credibility 345/1000

   4.4· 16,634 Amazon ratings

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4. 4
   

   Predator

   by Arnold Schwarzenegger · credibility 132/1000

   4.7· 15,831 Amazon ratings

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5. 5
   

   Bigger Leaner Stronger: The Simple Science of Building the Ultimate Male Body (The Bigger Leaner Stronger Series Book 1)

   by Michael Matthews · credibility 105/1000

   4.6· 15,533 Amazon ratings

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6. 6
   

   Fast. Feast. Repeat.: The Comprehensive Guide to Delay, Don't Deny® Intermittent Fasting--Including the 28-Day FAST Start

   by Gin Stephens · credibility 100/1000

   4.6· 15,146 Amazon ratings

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7. 7
   

   Delay, Don't Deny: Living an Intermittent Fasting Lifestyle

   by Gin Stephens · credibility 100/1000

   4.6· 13,553 Amazon ratings

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8. 8
   

   The Diabetes Code: Prevent and Reverse Type 2 Diabetes Naturally (The Code Series)

   by Dr. Jason Fung · credibility 567/1000

   4.7· 13,451 Amazon ratings

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9. 9
   

   Relentless: From Good to Great to Unstoppable (Tim Grover Winning Series)

   by Tim S Grover · credibility 59/1000

   4.7· 11,816 Amazon ratings

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10. 10
    

    Grain Brain: The Surprising Truth about Wheat, Carbs, and Sugar--Your Brain's Silent Killers

    by David Perlmutter · credibility 70/1000

    4.6· 11,319 Amazon ratings

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11. 11
    

    The Plant Paradox Quick and Easy: The 30-Day Plan to Lose Weight, Feel Great, and Live Lectin-Free

    by Dr. Steven R Gundry · credibility 345/1000

    4.3· 10,727 Amazon ratings

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12. 12
    

    Commando (Director's Cut)

    by Arnold Schwarzenegger · credibility 132/1000

    4.7· 9,343 Amazon ratings

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13. 13
    

    The Plant Paradox Cookbook: 100 Delicious Recipes to Help You Lose Weight, Heal Your Gut, and Live Lectin-Free

    by Dr. Steven R Gundry · credibility 345/1000

    4.4· 9,274 Amazon ratings

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14. 14
    

    Thinner Leaner Stronger: The Simple Science of Building the Ultimate Female Body (The Thinner Leaner Stronger Series Book 1)

    by Michael Matthews · credibility 105/1000

    4.4· 8,869 Amazon ratings

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15. 15
    

    The New Encyclopedia of Modern Bodybuilding: The Bible of Bodybuilding, Fully Updated and Revised

    by Arnold Schwarzenegger · credibility 132/1000

    4.8· 8,517 Amazon ratings

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16. 16
    

    Bright Line Eating: The Science of Living Happy, Thin and Free

    by Susan Peirce Thompson PhD · credibility 377/1000

    4.4· 8,281 Amazon ratings

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17. 17
    

    Why We Get Fat: And What to Do About It

    by Gary Taubes · credibility 56/1000

    4.5· 7,400 Amazon ratings

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18. 18
    

    Starting Strength

    by Mark Rippetoe · credibility 233/1000

    4.8· 6,226 Amazon ratings

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19. 19
    

    Glucose Revolution: The Life-Changing Power of Balancing Your Blood Sugar

    by Jessie Inchauspe · credibility 237/1000

    4.7· 6,202 Amazon ratings

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20. 20
    

    The Comfort Crisis: Embrace Discomfort To Reclaim Your Wild, Happy, Healthy Self

    by Michael Easter · credibility 47/1000

    4.7· 6,055 Amazon ratings

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21. 21
    

    Kettlebell Simple & Sinister: Revised and Updated Edition

    by Pavel Tsatsouline · credibility 56/1000

    4.7· 6,031 Amazon ratings

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22. 22
    

    Dr. Gundry's Diet Evolution: Turn Off the Genes That Are Killing You and Your Waistline

    by Dr. Steven R Gundry · credibility 345/1000

    4.1· 5,712 Amazon ratings

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23. 23
    

    The Blood Sugar Solution 10-Day Detox Diet: Activate Your Body's Natural Ability to Burn Fat and Lose Weight Fast (The Dr. Mark Hyman Library Book 3)

    by Mark Hyman M.D. · credibility 94/1000

    4.3· 5,459 Amazon ratings

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24. 24
    

    Glute Lab: The Art and Science of Strength and Physique Training

    by Bret Contreras · credibility 320/1000

    4.9· 5,423 Amazon ratings

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25. 25
    

    Total Recall (Enhanced Edition): My Unbelievably True Life Story

    by Arnold Schwarzenegger · credibility 132/1000

    4.6· 4,950 Amazon ratings

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