8 Best-Selling Fitness Books Millions Love

Fitness Books endorsed by Ben Greenfield, James Clear, and Spencer Nadolsky - top experts recommending best-selling guides

Ben Greenfield
James Clear
Updated on June 28, 2025
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There's something special about books that both critics and crowds love, especially in the world of fitness where practical guidance often meets endless trends. Millions turn to certain titles because they deliver clarity, structure, and science-backed methods that stand the test of time. Fitness remains a top priority for health and wellbeing, and these books have helped people navigate that journey with proven strategies.

Experts like Ben Greenfield, CEO of Kion and a leader in fitness and longevity, highlight books such as Thinner Leaner Stronger for cutting through the noise with straightforward science. Meanwhile, James Clear, an author focused on habits and decision-making, praises these works for their clear, actionable advice that fits into busy lives. Spencer Nadolsky, a board-certified obesity medicine physician, recommends these selections for their reliability and real-world impact on patient outcomes.

While these popular books provide proven frameworks, readers seeking content tailored to their specific Fitness needs might consider creating a personalized Fitness book that combines these validated approaches with your unique goals and background. This tailored approach helps bridge expert guidance with your personal fitness journey.

Best for science-backed female fitness
Ben Greenfield, a respected athlete and CEO known for his expertise in health and longevity, highlights how this book cuts through the noise surrounding fitness and nutrition. He praises Michael Matthews for combining hands-on experience with thorough research, describing the book as "easy to read and incredibly effective." Greenfield's endorsement reflects the book's widespread appeal among fitness enthusiasts seeking straightforward guidance. His experience navigating complex nutritional advice resonates with anyone wanting clear, science-backed fitness strategies. Alongside him, James Clear, author and habits expert, echoes this sentiment, emphasizing the book's clarity and practical approach in a noisy fitness landscape. Together, their insights suggest this book is a reliable choice for those serious about transforming their physique with proven methods.
BG

Recommended by Ben Greenfield

CEO of Kion, health and fitness expert

Nobody cuts through the fitness and nutrition confusion and clutter like Mike Matthews. And in Thinner Leaner Stronger, he draws on a powerful combination of time in the trenches and in-depth research to give you the straight talk about what actually works. This book is easy to read and incredibly effective. I highly recommend. (from Amazon)

2019·456 pages·Fitness, Exercise, Strength Training, Fat Loss, Muscle Growth

What started as Michael Matthews' personal journey to debunk fitness myths evolved into a guide that challenges the usual diet and exercise dogma women face. You’ll learn why obsessing over "clean eating" or endless cardio isn’t necessary, and instead discover how targeted resistance training paired with flexible nutrition can lead to fat loss and muscle definition. The book breaks down complex science into straightforward concepts, like the primary drivers of muscle growth and how to plan meals without feeling deprived. If you want a realistic approach to building a lean, strong body without gimmicks, this book delivers the knowledge you need.

International Bestseller
4th Edition Released
Supported by 367 Scientific Studies
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Best for serious bodybuilding enthusiasts
What makes this book unique in fitness is its authoritative voice from Arnold Schwarzenegger, a figure whose bodybuilding legacy is unmatched. This encyclopedia blends cutting-edge training methods with nutrition, injury management, and competition tactics, making it a comprehensive manual for anyone serious about muscle development. Its detailed photos and expert guidance cater to a wide spectrum—from amateurs to seasoned competitors—helping you take control of your body's potential. The book's broad appeal and enduring reputation underscore its role as a cornerstone in bodybuilding literature.
1999·800 pages·Bodybuilding, Sports Science, Fitness, Muscle Sculpting, Strength Training

Arnold Schwarzenegger, a seven-time Mr. Olympia champion and iconic figure in bodybuilding, co-authors this extensive guide that goes beyond lifting techniques to include nutrition, injury prevention, and sports psychology. You’ll find detailed instructions for sculpting every muscle, tailored advice for both beginners and pros, and insights into competitive posing and publicity. Chapters on dietary supplements and energy maintenance offer practical knowledge for anyone serious about muscle growth or fat loss. This book suits those ready to commit to bodybuilding with a clear roadmap from a legend, though casual gym-goers might find its depth more than they need.

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Best for custom fitness plans
This personalized AI book about fitness mastery is created based on your unique background, skill level, and specific fitness goals. By sharing what aspects of muscle building and fat loss you want to focus on, the book is crafted to match your interests and experience. This custom approach helps you explore proven fitness knowledge combined with reader-validated insights tailored precisely to your needs, making your fitness journey more effective and engaging.
2025·50-300 pages·Fitness, Muscle Building, Fat Loss, Strength Training, Nutrition Basics

This personalized book explores tailored approaches to building muscle and losing fat that align with your individual fitness background and goals. It examines fundamental principles of strength training, nutrition, and recovery while weaving in nuances specific to your interests and experience. By focusing on your unique needs, this tailored guide reveals how to balance muscle growth and fat reduction effectively, integrating reader-validated knowledge to enhance your workout routines and dietary choices. The book covers practical progressions and adaptations that match your personal pace, ensuring you gain clear understanding and actionable insights crafted specifically for your fitness journey.

Tailored Guide
Fitness Optimization
1,000+ Happy Readers
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Best for efficient strength training
P. D. Mangan, a microbiologist who focuses on science-based health and fitness, highlights this book as the best strength training resource he's encountered, emphasizing its efficient 12-minute weekly workout. His endorsement resonates with those seeking effective fitness solutions that respect busy schedules, underscoring how this approach reshaped his perspective on strength training. Alongside him, Rob Leathern, Facebook's Director of Product, appreciates the book's time-saving methods, noting that while it’s not a cure-all, it surpasses traditional gym routines. Their combined recommendations reflect why this program has struck a chord with both experts and a broad audience.
PD

Recommended by P. D. Mangan

Microbiologist and health educator

@GuruAnaerobic Body by Science is the best book I've read on strength training. (from X)

2009·304 pages·Fitness, Strength Training, Weight Training, High Intensity, Muscle Building

Unlike most fitness books that advocate hours of daily training, this program developed by John Little and Dr. Doug McGuff distills strength training into a scientifically backed regimen requiring just 12 minutes a week. Drawing on Dr. McGuff's expertise in exercise science and Little's innovative training protocols, you learn how to maximize muscle growth, increase strength, and boost metabolism efficiently. The book details a weekly high-intensity workout designed for busy individuals who want significant results without spending endless hours in the gym. If you’re looking for a program that challenges traditional exercise norms and fits into a hectic lifestyle, this offers a focused, research-based approach.

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Best for foundational strength builders
Mark Rippetoe has been a cornerstone in strength training since 1978, combining decades as a competitive powerlifter with coaching thousands of athletes. His extensive experience culminates in this book, which distills complex biomechanics into accessible guidance for mastering barbell lifts. Rippetoe’s seminars and practical approach have shaped many lifters’ journeys, making this an authoritative resource for anyone serious about building strength.

Mark Rippetoe, a seasoned powerlifter and coach since the late 1970s, crafted this book to demystify barbell training through clear biomechanics and proven techniques. You’ll learn precise execution of foundational lifts like the squat, deadlift, and press, along with the underlying principles of stress, recovery, and adaptation that drive strength gains. The book’s detailed photos and updated instructions reflect years of refining these methods with diverse athletes, making it suitable whether you’re a novice or seasoned lifter. If your goal is to build functional strength efficiently with evidence-based guidance, this book offers a focused path without fluff or gimmicks.

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Best for senior core strength
Cindy Brehse is a certified personal trainer and health coach with deep expertise in senior fitness, specializing in accessible programs that enhance mobility and well-being. Her background drives this book’s focus on easy-to-follow, effective core exercises designed specifically for older adults aiming to strengthen balance and confidence through short daily routines.
2021·158 pages·Fitness, Exercise, Ab Workout, Core Strength, Balance Training

What started as a quest to make fitness accessible for older adults became a focused manual on strengthening the core with minimal time commitment. Cindy Brehse, a certified personal trainer and health coach, leverages her extensive experience in senior fitness to break down complex anatomy into approachable exercises. You’ll learn how to engage major core muscles through 40 movements and 25 routines that accommodate seated, standing, and mat-based positions, with guidance on adjusting intensity to match your ability. The book’s clear instructions help you improve balance and confidence, making it a practical tool for seniors aiming to enhance mobility without equipment or lengthy sessions. If you want manageable daily exercises that respect your pace, this book fits the bill.

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Best for fast strength gains
This custom AI book on strength training is created based on your current fitness experience and specific goals for rapid muscle gain. By sharing what you want to focus on and your background, you receive a personalized guide that covers exactly the training routines and recovery tips suited for you. It makes sense to tailor strength-building advice because progress depends on your unique needs and starting point. Instead of generic advice, this book focuses on what matters to you to help accelerate gains effectively.
2025·50-300 pages·Fitness, Strength Training, Muscle Growth, Exercise Programming, Progressive Overload

This tailored book explores rapid strength-building routines designed specifically for your experience level and fitness goals. It covers a variety of proven exercises and training concepts while focusing on your interests and background, ensuring that every chapter aligns with what you want to achieve. The content reveals how to safely accelerate strength gains over 30 days, combining popular knowledge with personalized insights that match your unique starting point. By emphasizing tailored progressions and customized training intensity, the book makes strength development accessible and effective. It examines the nuances of muscle adaptation, recovery, and consistent practice, encouraging you to build strength efficiently within a short timeframe.

Tailored Guide
Strength Optimization
1,000+ Happy Readers
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Best for structured women’s training
Michael Matthews offers a practical fitness resource tailored for women seeking measurable results without gimmicks. This workout journal complements his popular program by providing a detailed 12-month plan focused on resistance training and nutrition guidance. Designed to fit into a busy lifestyle, it emphasizes consistent progress and realistic goals for fat loss and muscle gain. Women committed to transforming their physique through manageable, evidence-based exercise will find this book a helpful companion on their fitness journey.
2014·Fitness, Exercise, Resistance Training, Workout Planning, Muscle Definition

Michael Matthews approaches women's fitness with a straightforward, no-nonsense mindset that challenges flashy quick fixes. Instead of promising rapid transformations through gimmicks, he offers a year-long workout journal designed to guide you through effective resistance training routines that build muscle definition and promote fat loss sustainably. The book lays out specific exercises, progression tips, and workout substitutions that fit into just 3 to 5 hours per week, making it manageable for busy schedules. If you're aiming for a leaner, stronger physique with a realistic and structured plan, this book helps you track your progress and stay motivated through the process.

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Best for mental toughness development
Entrepreneur Jesse Itzler’s Living With a SEAL offers a unique fitness experience through the lens of extreme training alongside one of the toughest Navy SEALs. This New York Times and LA Times bestseller combines humor with rigorous physical challenges, illustrating how stepping beyond comfort zones can transform both body and mindset. The book’s approach appeals to anyone looking to shake off routine fitness and infuse their regimen with grit and resilience, making it a standout contribution to fitness literature focused on mental and physical endurance.
2015·272 pages·Fitness, Discipline, Endurance, Resilience, Mindset

This isn't another fitness book promising quick transformations. Jesse Itzler's account of living with a Navy SEAL for 31 days challenges you to rethink what discipline and toughness really mean. Through vivid episodes, like waking up to grueling workouts and pushing mental barriers, you gain insights into cultivating resilience and embracing discomfort as a growth tool. This book suits those who want more than exercise routines—they seek a mindset shift to break through complacency and build lasting endurance.

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Fitness for Life offers a uniquely structured approach to physical education that has resonated with millions, guiding individuals toward sustainable activity throughout their lives. Its evidence-based framework, including the innovative Stairway to Lifetime Fitness and updated Physical Activity Pyramid, supports you in taking charge of your fitness journey. The book's incorporation of self-assessments and technology makes it a practical tool for both students and educators aiming to meet rigorous standards while fostering personal responsibility for health. This resource addresses the challenge of maintaining physical activity beyond school, making it a trusted companion for lifelong wellness.
1754·Fitness, Physical Education, Health, Self-Management, Activity Planning

Drawing from decades of experience in physical education, Charles B. Corbin developed Fitness for Life to empower you with the knowledge and skills to maintain lifelong physical activity. This edition introduces new chapters on strategies and science behind active living, helping you transition from school-based fitness to sustainable habits. You'll learn to navigate the Physical Activity Pyramid, apply biomechanical principles, and use self-assessments like Fitnessgram to tailor your personal fitness plan. It’s particularly suited for students and educators aiming to meet national physical education standards, but anyone interested in a structured, evidence-based approach to fitness can benefit from the clear guidance.

Texty Award for Excellence
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Conclusion

These eight books reveal clear themes: reliance on evidence-based training, a blend of mental and physical toughness, and adaptable plans that accommodate various lifestyles and fitness levels. If you prefer proven methods grounded in science, starting with Thinner Leaner Stronger and Body by Science offers a solid foundation.

For those interested in strength training mechanics and technique, Starting Strength Basic Barbell Training and The New Encyclopedia of Modern Bodybuilding provide in-depth expertise. Meanwhile, Living with a SEAL offers an inspiring mindset shift that complements physical training.

Alternatively, you can create a personalized Fitness book to combine proven methods with your unique needs. These widely-adopted approaches have helped many readers succeed and can guide you toward your own fitness breakthroughs.

Frequently Asked Questions

I'm overwhelmed by choice – which book should I start with?

Start with Thinner Leaner Stronger for clear, science-backed guidance that's accessible and effective. It lays a solid foundation before moving to more specialized books like Starting Strength or Body by Science.

Are these books too advanced for someone new to Fitness?

Not at all. Many books, like 5-Minute Core Exercises for Seniors, cater to beginners or specific groups. Others provide detailed explanations suitable for novices willing to learn foundational principles.

Should I start with the newest book or a classic?

Both offer value. Classics like The New Encyclopedia of Modern Bodybuilding remain relevant, while newer books bring updated science. Balancing both gives a broad perspective on fitness evolution.

Do I really need to read all of these, or can I just pick one?

You can pick one to start based on your goals, but combining insights from multiple books often leads to better results. For example, pairing Body by Science with Living with a SEAL blends technique and mindset.

Which books focus more on theory vs. practical application?

Fitness for Life leans toward theory and education, while Starting Strength and Thinner Leaner Stronger emphasize practical routines and actionable advice you can apply immediately.

Can personalized Fitness books complement these expert recommendations?

Yes! Personalized books build on these proven methods, tailoring guidance to your unique goals and background. They complement expert advice by focusing on what matters most to you. Learn more here.

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