Muscle & Fitness logo Muscle & Fitness

  • Workouts

    Workouts

    • Workout Routines
    • Workout Tips
    • Fitness
    • Athlete/Celebrity Workouts
    • Exercise Videos
    Find Exercises Targeting…
    • Abs and Core Exercises
    • Arm Exercises
    • Back Exercises
    • Chest Exercises
    • Leg Exercises
    • Shoulder Exercises
  • Nutrition

    Nutrition

    • Healthy Eating
    • Lose Fat
    • Gain Mass
    • Supplements
    • Performance Nutrition
    Female with a healthy gut health avoiding inflammation eating healthy non-processed foods recommended by a Gastroenterologist
    Healthy Eating

    Low Energy, Bloating, and Brain Fog? Your Gut Health Could Be the Reason...

    Korean side dish Kimchi holds nutritional benefits for gut health
    Healthy Eating

    What Science Says About the Immune-Boosting Power of Kimchi

    Scientist performing tests on processed foods and whole foods
    Healthy Eating

    Study Reveals Processed Foods Cause Overeating and Slow Fat Loss

    Various Healthy Post workout foods display in a heart shape bowl for
    Healthy Eating

    Best Post-Workout Foods for Muscle Recovery, Growth, and Heart Health

  • Athletes & Celebrities

    Athletes & Celebrities

    • News
    • Interviews
    • Women
    • Pro Tips
    • Behind-the-Scenes
    • Videos
    2002 World Cup Team USA Captain Landon Donovan celebrating
    Interviews

    Landon Donovan’s New Game Plan for Being a Soccer Dad

    Hidde Weersma Breaks HYROX Record
    News

    HYROX Record Broken: Hidde Weersma Goes Sub-53 in London

    Actor Alan Ritchson fights his neighbor in front of kids over a noise complaint
    News

    Alan Ritchson's Neighbor Speaks Out After Fight Goes Viral

    Female UFC Fighters Rousey vs Carano
    News

    Can Fighters Over 35 Still Win? Rousey vs Carano Sparks Debate

  • Features

    Features

    • From our Partners
    • Active Lifestyle
    • M&F: Fit to Serve
    • Gear
    • News
    • Opinion
    Doctor examining a fatty liver using technology and previous medical studies
    News

    The Surprising Link Between CBD, Liver Health, and Fitness

    German coach and strongman Sina Ruppenthal Sets Guinness World Record Throwing 10 Men
    News

    This Strongwoman’s Viral Feat Redefines Strength Training

    Chuck Norris
    News

    Action-Movie Icon Chuck Norris Has Died At Age 86

    Premier gym equipment
    From our Partners

    Fans Turn the Arnold Classic Expo Into a Training Ground

  • Anti-Aging

    Anti-Aging

    • Functional Medicine
    • Hormone Optimization
    • Recovery
    • Wellness
    Author and Neuroscientist Dr. Tommy Wood shares his insights on the aging brain
    Wellness

    Why You Need to Work Out Now to Prevent Cognitive Decline Later

    Human muscular fibers demonstrating the concept of musclespan in aging
    Wellness

    Why Musclespan Is The New Metric We Should Focus On

    Bradley Carden CEO of Solbasium red light therapy showing his red light device for recovery
    Recovery

    How Solbasium Put Red-Light Recovery on the Sidelines of the NFL

    Participants in the Unlimited Life biohacking retreat in the Amazon Rainforest
    Wellness

    5 Aging Lessons Learned from a Biohacking Retreat Deep in the Amazon

  • Flex

    Flex

    • Olympia Coverage
    • Athletes
    • Nutrition
    • Training
    • Videos
    The menace podcast covers the 2026 Detroit Pro
    News

    Are Distended Stomachs Ruining Bodybuilding? Experts Sound Off

    Men’s Physique competitor Burak King 2026 Turkey Pro plans
    News

    Burak King Reveals the Smartest Path to Olympia Qualification in 2026

    Simeon Panda performing his Shoulder Workout for massive delts
    Training

    Simeon Panda's 4-Move Shoulder Workout For Stronger Delts

    Sam Sulek at the 2026 Arnold Classic discussing his diet plan ahead of the Arnold UK 2026
    News

    Sam Sulek Reveals New Diet Strategy Ahead of the Arnold Classic UK

  • Hers

    Hers

    • Workouts
    • Nutrition
    • Supplements
    • Athletes & Celebrities
    • Features
    Tiffany Stratton
    Muscle & Fitness Hers

    Tiffany Stratton Is Prepping for Her Return to Another Stage

    Fitness influencer Katie “Liftz” Salerni showing her top glute exercises for a round butt
    Hers Workouts

    Katie Salerni Shares Her Favorite Bodyweight Glute Moves

    Make up artist Bruna Dallo
    Hers Athletes & Celebrities

    Makeup Artist is Turning Passions into Careers

    Holly Brooks founder of Strong Girl Society promoting healthy fitness and promoting scale ditching.
    Hers Features

    Why Holly Brooks Ditched the Scales to Focus On Being Stronger

  • Olympia

    Olympia

    • Olympia Coverage
    • Buy Tickets
    Caesar Bacarella performing a dumbbell workout with biceps curls
    Pro Tips

    Caesar Bacarella Is Building a Fitness Empire at Full Speed

    Olympia-2019-Whiteny-Jones-Press-Conference
    Interviews

    Whitney Jones Can Break, But Can Never Be Broken

    IFBB Wellness Pro Yarishna Ayala
    Interviews

    Yarishna Ayala Shares Advice for Future Wellness Division Competitors

    2021 Mr. Olympia Top 3 winners Brandon Curry, Big Ramy, Hadi Choopin
    News

    BIG RAMY WINS THE 2021 OLYMPIA!

Subscribe to YouTube Subscribe to the Newsletter Terms of Use Privacy Policy Cookie Policy Accessibility Statement Do Not Sell
  • Workouts
    • Workout Routines
    • Workout Tips
    • Fitness
    • Athlete/Celebrity Workouts
    • Exercise Videos
  • Nutrition
    • Healthy Eating
    • Lose Fat
    • Gain Mass
    • Supplements
    • Performance Nutrition
  • Athletes & Celebrities
    • News
    • Interviews
    • Women
    • Pro Tips
    • Behind-the-Scenes
    • Videos
  • Features
    • From our Partners
    • Active Lifestyle
    • M&F: Fit to Serve
    • Gear
    • News
    • Opinion
  • Anti-Aging
    • Functional Medicine
    • Hormone Optimization
    • Recovery
    • Wellness
  • Flex
    • Olympia Coverage
    • Athletes
    • Nutrition
    • Training
    • Videos
  • Hers
    • Workouts
    • Nutrition
    • Supplements
    • Athletes & Celebrities
    • Features
  • Olympia
    • Olympia Coverage
    • Buy Tickets
  • Resources & Highlights
    • Topics
    • Videos
    • Podcasts
    • Contact
    • Terms of Use
    • Privacy Policy
    • Cookie Policy
    • Accessibility Statement
    • Do Not Sell

Stay Connected

Newsletter Signup

Stay up to date

Sign up below to receive our newest workout routines, recipes, news stories, and offers from our partners

Facebook Twitter Youtube Pinterest
Open menu button
Open search bar button
×

Search M&F

Featured Articles
Lean Muscle
Healthy Eating

28-Days-to-Lean Meal Plan

With the right plan and the right discipline, you can get seriously shredded in just 28 days.

Read article
Glamorous Hollywood actress in a black evening gown posing at a red carpet event, representing one of the hottest female celebrities in Hollywood
Women

The 25 Hottest Female Celebrities

Talented stars, killer physiques.

Read article
Bench press record holder Bill Gillespie breaking the world record at age 62
Pro Tips

The 'Dos' and 'Don’ts' of Bill Gillespie’s Record-Breaking Bench Press

At age 62, "Big Bill" shares his wisdom to dominate one of the ultimate strength marks.

Read article
The 50 Best Female Fitness Influencers on Instagram
Girls

The 50 Best Fitness Influencers on Instagram

Follow these fit women we're crushing on for inspiration, workout ideas, and motivation.

Read article
Athletes & Celebrities

5 Skinny Guys Who Transformed Into Beasts

From skinny to fit, these athletes earned fame, fortune and impressive physiques in the gym.

by James Maio
  • Click to share on Facebook (Opens in new window)
  • Click to share on Twitter (Opens in new window)
  • Click to share on Pinterest (Opens in new window)
  • Click to share on Facebook (Opens in new window)
  • Click to share on Twitter (Opens in new window)
  • Click to share on Pinterest (Opens in new window)
5 Skinny Guys That Got Jacked
View Gallery

5 Skinny Guys Who Transformed Into Beasts

Close gallery popup button
1 OF 6

1 of 6

5 Skinny Guys That Got Jacked

Sizing Them Up

Some men came into this world with a full, natural build conducive to putting on muscle almost effortlessly.  Others were not so lucky.  Guys looking to build mass and get stronger come in all different shapes and sizes, but some in particular–the naturally skinny guys–are all bound by the same cause.  Looking to make large changes and silence their critics, these guys hit the iron and barreled through their own obstacles like a freight train.  SEE ALSO: 5 Rules For Building Mass

2 of 6

Kaep

No. 5: Colin Kaepernick

You’d be hard pressed to find a guy as tall and lanky as Colin Kaepernick during his baseball years.  Pictured left, the young Kaep could have been blown off of the mound by a strong enough wind.  When Colin was drafted into the NFL, critics bashed his physique, calling him “skinny” and “light.”  The criticism fired Colin up, and he decided to put on some poundage to up his game and silence the doubters.  Over the offseason, Kaepernick would walk into the Proactive Performance facility in Los Angeles, where he would train alongside the likes of other big guys like Clay Matthews and CJ Spiller.  Now, it’s typical for Colin to train six days a week for 4-5 hours each day during the offseason.  The bulk of his regimen includes traditional weight training plus explosive resistance band movements.  One of his favorite exercises is the single-leg dumbbell romanian deadlift.  Add in a high protein diet, Colin is the shredded athlete you see today.  Colin’s impressive gains even worried his former coach, Jim Harbaugh, who ironically told Kaep not to gain “too much muscle.”  The primary focus of Colin’s training has been to build strength without the loss of speed and agility, and the mentality has served him well–we’ve all seen those gazelle-like dashes out of trouble that Colin has made his signature move on the field.  SEE ALSO: The Strength And Speed Workout 

3 of 6

Lilly

No. 4: Brandon Lilly

Brandon Lilly is one of the biggest, baddest pro powerlifters out there.  Known for developing the Cube Method for strength training, Lilly owns a raw 3 lift total (squat, bench, deadlift) in excess of 2,000 pounds.  The PR crushing beast has come a long way—the 20’s version of Brandon (pictured left) is almost too hard to comprehend.   Along the way, Lilly began to train at the famed Westside Barbell Gym under the watch of legendary powerlifter Louie Simmons.  During heavy training cycles, Lilly will eat in the neighborhood of 7,000-8,000 calories per day.   Brandon Lilly’s numbers, diet, and transformation are just hard to wrap your head around.  SEE ALSO: Westside Ways Workout

4 of 6

Hardy

No. 3: Tom Hardy

From fighting against Batman as one of pop culture’s most fearsome supervillains, to an ex-Marine MMA warrior, Tom Hardy has always been able to pack on huge slabs of mass.  To bulk up, Hardy prefers the traditional compound movements like the squat, bench and deadlift accompanied by a massive diet of nearly 4,000 calories every day.  Although generally not recommended for building mass, Tom pounded down tons of liquid calories such as shakes with ice cream, milk, and peanut butter, and he advocates that you should “eat pizza whenever you can.”  Maybe not the greatest advice, but hey, he did what he had to do to get big for his roles, and the finished product on-screen is still very impressive. SEE ALSO: Add Muscle, Subtract Fat: The Clean Bulk That Works

5 of 6

Dwightglass

No. 2: Dwight Howard

“Intimidating.” “Towering.”  “Unsettling.”  Words that some have used to describe Dwight Howard’s presence on the court.  Howard got a serious reality check when Charles Barkley told him to “bulk up.”  Howard had always dedicated his free time to the weight room, and getting into top physical shape.  Now he has a 365lb bench press to show for it, which Howard cites as his favorite lift.  For Howard, weight training has become a non-dispensable method for staying on the court and injury-free.  Standing tall at 6’9″ and moving with 265lbs of mass, Howard has become one of the best rebounders and shot blockers in the NBA.  SEE ALSO: The Bigger, Badder Bench Press Program

6 of 6

Thor

No. 1: Hafthor Bjornsson

Whether you know him as “The Mountain,” or as World’s Strongest Man runner-up, chances are that you’ve been either frightened or awe-inspired by the behemoth size of Hafthor Julius Bjornsson.  Known simply as “Thor,” among Strongman circles, Bjornsson is the mother of all skinny to huge transformations.  Thor started his journey as a lanky basketball player.  After a jaw-dropping 200lb transformation in two years, Bjornsson now stands at 440lbs.  His protein intake is through the roof–Thor routinely eats roughly 2 pounds of meat with every meal.  Bjornsson’s transformation has afforded him the opportunity to compete both in the World’s Strongest Man and international Strongman competitions, as well as an acting career.  To show for it, he holds the titles of strongest man in Iceland and 3rd strongest man in the world.  SEE ALSO: Poundstone Power: Train Like A Strongman

Back to intro

Sizing Them Up

Some men came into this world with a full, natural build conducive to putting on muscle almost effortlessly.  Others were not so lucky.  Guys looking to build mass and get stronger come in all different shapes and sizes, but some in particular–the naturally skinny guys–are all bound by the same cause.  Looking to make large changes and silence their critics, these guys hit the iron and barreled through their own obstacles like a freight train.  

SEE ALSO: 5 Rules For Building Mass

No. 5: Colin Kaepernick

You’d be hard pressed to find a guy as tall and lanky as Colin Kaepernick during his baseball years.  Pictured left, the young Kaep could have been blown off of the mound by a strong enough wind.  When Colin was drafted into the NFL, critics bashed his physique, calling him “skinny” and “light.”  The criticism fired Colin up, and he decided to put on some poundage to up his game and silence the doubters.  Over the offseason, Kaepernick would walk into the Proactive Performance facility in Los Angeles, where he would train alongside the likes of other big guys like Clay Matthews and CJ Spiller.  Now, it’s typical for Colin to train six days a week for 4-5 hours each day during the offseason.  The bulk of his regimen includes traditional weight training plus explosive resistance band movements.  One of his favorite exercises is the single-leg dumbbell romanian deadlift.  Add in a high protein diet, Colin is the shredded athlete you see today.  Colin’s impressive gains even worried his former coach, Jim Harbaugh, who ironically told Kaep not to gain “too much muscle.”  The primary focus of Colin’s training has been to build strength without the loss of speed and agility, and the mentality has served him well–we’ve all seen those gazelle-like dashes out of trouble that Colin has made his signature move on the field.  

SEE ALSO: The Strength And Speed Workout

 

No. 4: Brandon Lilly

Brandon Lilly is one of the biggest, baddest pro powerlifters out there.  Known for developing the Cube Method for strength training, Lilly owns a raw 3 lift total (squat, bench, deadlift) in excess of 2,000 pounds.  The PR crushing beast has come a long way—the 20’s version of Brandon (pictured left) is almost too hard to comprehend.   Along the way, Lilly began to train at the famed Westside Barbell Gym under the watch of legendary powerlifter Louie Simmons.  During heavy training cycles, Lilly will eat in the neighborhood of 7,000-8,000 calories per day.   Brandon Lilly’s numbers, diet, and transformation are just hard to wrap your head around.  

SEE ALSO: Westside Ways Workout

No. 3: Tom Hardy

From fighting against Batman as one of pop culture’s most fearsome supervillains, to an ex-Marine MMA warrior, Tom Hardy has always been able to pack on huge slabs of mass.  To bulk up, Hardy prefers the traditional compound movements like the squat, bench and deadlift accompanied by a massive diet of nearly 4,000 calories every day.  Although generally not recommended for building mass, Tom pounded down tons of liquid calories such as shakes with ice cream, milk, and peanut butter, and he advocates that you should “eat pizza whenever you can.”  Maybe not the greatest advice, but hey, he did what he had to do to get big for his roles, and the finished product on-screen is still very impressive. 

SEE ALSO: Add Muscle, Subtract Fat: The Clean Bulk That Works

No. 2: Dwight Howard

“Intimidating.” “Towering.”  “Unsettling.”  Words that some have used to describe Dwight Howard’s presence on the court.  Howard got a serious reality check when Charles Barkley told him to “bulk up.”  Howard had always dedicated his free time to the weight room, and getting into top physical shape.  Now he has a 365lb bench press to show for it, which Howard cites as his favorite lift.  For Howard, weight training has become a non-dispensable method for staying on the court and injury-free.  Standing tall at 6’9″ and moving with 265lbs of mass, Howard has become one of the best rebounders and shot blockers in the NBA.  

SEE ALSO: The Bigger, Badder Bench Press Program

No. 1: Hafthor Bjornsson

Whether you know him as “The Mountain,” or as World’s Strongest Man runner-up, chances are that you’ve been either frightened or awe-inspired by the behemoth size of Hafthor Julius Bjornsson.  Known simply as “Thor,” among Strongman circles, Bjornsson is the mother of all skinny to huge transformations.  Thor started his journey as a lanky basketball player.  After a jaw-dropping 200lb transformation in two years, Bjornsson now stands at 440lbs.  His protein intake is through the roof–Thor routinely eats roughly 2 pounds of meat with every meal.  Bjornsson’s transformation has afforded him the opportunity to compete both in the World’s Strongest Man and international Strongman competitions, as well as an acting career.  To show for it, he holds the titles of strongest man in Iceland and 3rd strongest man in the world.  

SEE ALSO: Poundstone Power: Train Like A Strongman

's>
Topics:
  • Bodybuilding
  • Inspiration
  • Sports
  • Strength Training
Author picture
Written by James Maio
Related Articles
2002 World Cup Team USA Captain Landon Donovan celebrating
Interviews

Landon Donovan’s New Game Plan for Being a Soccer Dad

Hidde Weersma Breaks HYROX Record
News

HYROX Record Broken: Hidde Weersma Goes Sub-53 in London

Newsletter Signup

Stay up to date

Sign up below to receive our newest workout routines, recipes, news stories, and offers from our partners

Muscle & Fitness logo

Follow us

Facebook Twitter Youtube Pinterest

More news

2002 World Cup Team USA Captain Landon Donovan celebrating
Interviews

Landon Donovan’s New Game Plan for Being a Soccer Dad

Donovan shares in his new book how his real growth came from confronting his struggles off the field.

Read article
Hidde Weersma Breaks HYROX Record
News

HYROX Record Broken: Hidde Weersma Goes Sub-53 in London

The elite athlete from the Netherland’s made history in London.

Read article
Actor Alan Ritchson fights his neighbor in front of kids over a noise complaint
News

Alan Ritchson's Neighbor Speaks Out After Fight Goes Viral

The “other guy” has explained what went down from his point of view.

Read article
All Athletes & Celebrities
  1. Home
  2. /
  3. Athletes & Celebrities
  4. /
  5. 5 Skinny Guys Who Transformed Into Beasts
Muscle & Fitness logo
  • Workouts
  • Nutrition
  • Athletes & Celebrities
  • Features
  • Recipes
  • Topics
  • Videos
  • Exercise Videos
  • Podcasts
  • RSS Feed
  • Buy Olympia Tickets
  • Archives
  • Sitemap
Facebook Twitter Youtube Pinterest

Newsletter Signup

Stay up to date

Sign up below to receive our newest workout routines, recipes, news stories, and offers from our partners

JW Media, LLC

Copyright 2026 JW Media, LLC, parent company of Muscle & Fitness. All rights reserved.

Contact Us Terms of Use Privacy Policy Cookie Policy Do Not Sell Accessibility Statement