If anyone knows how to hit the gym hard, it’s boxer Anthony Joshua.

The 6’6”, 234-lb heavyweight champion is an athletic beast, and his intense workout routine is one reason why, at 19-0, he's undefeated in his boxing career.

What’s even more impressive about Joshua: He’s won all 19 of those fights by knockout—including against Wladimir Klitschko on April 29 at Wembley Stadium in London, where he unified the WBA and IBF heavyweight titles.

Klitschko was no slouch at 6’6”, 246 lbs, but the English boxer was prepared. As shown in this post, Joshua trained like a beast and that's why he was able to connect on a savage uppercut before knocking out the goliath boxer.

What did Joshua do to prepare?

He crushed workouts in the gym. Take a look at Joshua during fitness testing—he was as shredded as he’s ever been:

 

All wired up for fitness testing

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Joshua keeps pretty good company, too. Here he is with Dwayne “The Rock” Johnson (one of 25 ripped dudes who own the Instagram workout game):

 

Joshua doesn’t mess around when it comes to his training. Just like these 30 MLB players, these 11 NBA All-Stars, and these 11 Super Bowl-champion Patriots players, Joshua enjoys putting his workouts on social media.

Here are Joshua’s 33 best Instagram workout moments:

 

33. Joshua gets in an intense full-body workout:

 

 

Trainin #AJBoxing

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32. Joshua gets some jump rope work in. "Float like a butterfly, sting like a bee," as the late, great Muhammad Ali used to say:

 

 

Jumping rope 💥 @underarmouruk #IWILL

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31. Joshua works on his reaction time and coordination with a tennis ball drill:

 

 

 

Reactions 🕵🏾

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30. Wouldn't want to be the ball in this workout:

 

Short simple & explosive

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29. Heavy ropes, barbells, chains, cable work, med ball slams—all in a day's work:

 

Let's rock n' roll   #AJBoxing

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28. Joshua stretches things out and gets to work:

 

I got to stay focused on the long term goal

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27. Joshua shows off his strength with this sled pull:

 

This is the pain it takes for me to achieve my goals! #AJBoxing

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26. Joshua uses kettlebells for an all-around workout:

 

no bicep curls. no max bench press. This is 100% conditioning  #FitnessFam #LifeStyle

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25. The boxer gives his rotational power a boost:

 

Planted feet - Rotational Power

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24. The heavy ropes give Joshua a big workout:

 

Solid week of cardio, conditioning and boxing! #AJBoxing

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23. The boxer adds a twist to this cable workout:

 

Do not disturb! #AJBoxing

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22. Joshua shows off his box jump form with these hurdle drills:

 

Working hard to make it harder to fail #Team

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21. Did we mention that Joshua is shredded?

 

Bada Bing! #AJBoxing

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20. This montage shows Joshua doing a little bit of everything—tire pushes, barbell lifts, agility drills, punching drills—and looking shredded:

 

Every training camp I up the ante! What's next? #TBT #StayHungry

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19. Joshua goes side-to-side with the log bar:

 

Don't mistake hype for reality and hope for achievement, keep on building #AJBoxing

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18. This montage shows off Joshua crushing some big weight on his split back squat:

 

Feeling good!! Putting together the final touches #FightWeek #AJBoxing

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17. Joshua pulls off the high school rope workout you always hated doing:

 

Added a little something different into my workout routine! I think I'll leave this to the army lads

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16. Joshua shows off his strength and takes out his anger with a bat on this tire:

 

Working on my strength getting ready for my next fight against Sprott. 10 Days to go... #CleverlyBellew2

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15. Joshua burns up his shoulders with a barbell hammer press:

 

Shoulders are still on after this morning's session with @jamie_velocity! #AJBoxing

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14. While doing pullups, Joshua shows off his shredded back:

 

No time to wait. Only time to prepare. Who's next? #AJBoxing

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13. The champion works on his upper body with some kettlebells:

 

12. Joshua brings the pain with some chains:

 

Welcome to the KO show June 25th

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11. Joshua powers up with some Bulgarian split squats:

 

Fight #18 pending

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10. Joshua crushes his core with some med ball work:

 

Explosive power meets the core #AJBoxing

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9. Joshua grinds it out with a sled push:

 

Time to up the M

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8. Joshua pushes hard with some hip thrusts with big weight on him:

 

No Glutes No Glory #StayHungry #StayHumble

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7. No tire is too big for Joshua to use during a workout:

 

Block out the noise.. And listen to that voice that says "I'm working hard but not hard enough" #AJBoxing

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6. Joshua loads up some big weight for a deadlift:

 

Only adding discs! #AJBoxing

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5. Joshua's back is absolutely shredded:

 

The Profit Margin #AJBoxing

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4. The muscle detail on Joshua is amazing as he pushes his legs hard for a workout:

 

Perfect evening #AJBoxing

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3. Joshua's biceps and forearms look massive as he gets in a lift:

 

Hamstrings #AJBoxing

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2. Joshua shows off his shredded six-pack on the rowing machine:

 

I always wondered why the rowing machines are never in use! Now I know why #Pain

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1. Joshua makes things tough by adding some bands to his trap bar deadlift:

 

Welcome to my casa! #NoRefunds

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