Gritbox Fitness

Gritbox Fitness

Grit Box was founded in Charleston in 2015 and is expanding to Charlotte in the spring of 2022.

We’ve combined the high intensity and therapeutic power of kickboxing with the transformative results of strength training into a fitness experience like you’ve never seen. We’ve developed Grit Box to allow beginners and experienced fitness enthusiasts to get a kickass workout together in the same class. Grit Box is a space where you come as you are and emerge feeling inspired to unleash your inner GRIT!

Operating as usual


We're closing in on the weekend, y'all 🙌

Get in the gym, kick some ass, get your happy hour on for 🍻


We made it to the weekend, Grit Gang 👏👏👏


Cheers y'all 🍻 we made it to Thirsty Thursday!


Kickboxing is one hell of a way to boost your self-confidence. It’s a workout that requires grit, determination, and mental toughness, all of which can translate into other areas of your life.

When you step into the sweat box, you quickly learn that it’s not just about throwing punches. It’s about developing a mental fortitude that helps you overcome any obstacle. And that kind of mental strength can do wonders for your self-confidence!

Check out our latest blog for more info 👉 link in bio


This week isn't going to conquer itself. Get out there and show it who's boss 💪


Best of Charleston voting ends TOMORROW! Grit Box is a finalist for Best Exercise Studio and we need your help bringing back the title! Y'all know what's up, so let's make sure all of Charleston knows that Grit Box is the place to be 😎🏆

Coach Storm is a finalist for Charleston's Best Personal Trainer! If you've taken his class, you know he brings the heat to the studio. Show our head coach some love by submitting your vote now. 🥊

Link in bio!

Photos from Gritbox Fitness's post 26/01/2023

Still reminiscing about our grittiest Grit & Glow yet 🤩⚡️

Huge thanks to our members and vendors (, , ) for being a part of this celebration! We can't wait to see what year 4 has in store for the Grit Box Fam 🫶

Timeline photos 04/10/2022

switch knee FTW 😎

Timeline photos 12/09/2022

Remember why you started 💪

Timeline photos 16/08/2022

We've got some DOPE events and promos coming up soon, stay tuned 📣

Timeline photos 08/08/2022

Don't let the Monday blues get ya, it's gonna be a kick ass week 😎 💪

Photos from Gritbox Fitness's post 03/08/2022

The Grit Gang is coming back to CLT this weekend for our 3rd Boxing & Booch!

Come out and kick it with us at and get a refreshing Kombucha after 😍


We will be partying it up at a Tailgate at from 4pm-11pm and will be giving out some Flying Embers hard kombucha!

See y'all there!

Timeline photos 14/07/2022

Did someone say Thirsty Thursday??? See y'all tonight 😎

Timeline photos 05/07/2022

We're hiring! 🥊

Grit Box is expanding and we are looking for some badass coaches to join our team!

Looking for part time/ full time positions! (No kickboxing/ boxing experience required)

Email your resume to [email protected] to join the Grit Gang 💪

Timeline photos 04/07/2022

Happy 4th, Grit Gang 🇺🇸 🇺🇸 🇺🇸

Timeline photos 14/06/2022

It's your LAST CHANCE to secure this amazing deal ‼️ Get a 5 class pack for $69 😏

Sale ends tomorrow! Click the link in our bio to purchase 🌊 🌴

Timeline photos 08/06/2022

This could be you all summer ⬆️ 😍

aka you can purchase a 5 class pack for $69 with our Summer of $69 Sale 😱 This offer only stands until 6/15 so get after it!


It's Member Appreciation Month!!!! Which means all members can upgrade to unlimited during the month of June with no additional fee and friends are all welcome for one free class!

Timeline photos 01/06/2022

We're bringing the 🔥 with our Summer of $69 Sale. Get a 5-class pack for only $69!

Make sure you hop on this insane offer before it ends!

Timeline photos 20/05/2022

It's time to grind this summer 🌴 with our 🚨Hit it and Fit it Giveaway🚨

Prizes🏆: $250 Lulu Lemon gift card + 1 month unlimited at Grit Box!

How to enter: Click the "Hit it and Fit it" link in the bio and plug in your info 🤩

This giveaway will be closed next Friday (5/27) so make sure you don't miss out!

Timeline photos 18/05/2022

Happy Birthday to our Bootcamp Queen 👑. We 💙 you!!!

Timeline photos 06/05/2022

Gloves in the air if you're ready for the weekend AND our annual pool party 😍

Remember to RSVP on the app and add any +1's information as well! We can't wait to party with y'all!🍻

Timeline photos 28/04/2022

Work hard play harder💪🍻🌴 Get your solo cups and sunscreen ready for our 🌊Grit Box Annual Pool Party 🌊

Where: Cooper's Cove (aka .gritbox house)

When: Party starts at 1:00pm and we'll send you a text with an address closer to the date.

Plus 1's are welcome! Drinks and food will be provided but feel free to BYOB+F. RSVP by signing up for the Grit Gang Pool Party class on our app where you can also add in your plus 1's information as well!

P.S. we're hearing rumors about a slip & flip 😮🤷‍♀️

Timeline photos 27/04/2022

We stay gritty, Wednesday 😤

Timeline photos 21/04/2022

That "tomorrow's Friday" feeling 😍

Timeline photos 07/04/2022

Who's ready for a kick ass house party? 😎🎉

Members and a guest are invited to the Grit Box House Party on Saturday night. Come hang with our team, watch the ufc fights, play games and connect with your fellow Grit Gang! We'll also have games, light snacks and refreshments.

When: Saturday, April 9 at 8PM
Where: Grit Box Charleston
Who: Grit Box members and guests

Timeline photos 05/04/2022


Due to some crazy ass weather conditions later today we're rescheduling Turnt Up Tuesday to next week (4/12)

We will still have classes tonight, they'll just be a little less turnt 😂

Stay safe and 💥👊

Timeline photos 31/03/2022

Work now, beer later 🍻 Happy thirsty Thursday, y'all!

Timeline photos 29/03/2022

Another Turnt Up Tuesday comin' your way!

We are hyped to party w , .gritbox , and

5:15pm and 6:30pm downtown CHS

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Our Story

We deliver diverse and all-inclusive fitness programs to maximize your results while also offering fitness opportunities for special populations in Charleston, SC. We pride ourselves in a fun, hard-working culture, encouraging the community to join our movement toward a healthier and more fulfilled life. We hope you’ll join us to experience one of the best local fitness communities around.

: the perseverance to overcome obstacles or challenges that lie within a gritty individual's path to success

: toughness, courage; firmness of mind and spirit
: a positive trait based on an individual's passion for a goal

Videos (show all)

Who wants to see @cody.gritbox back On the mic soon?!? 💥🥊💪🏼
🚨PSA 🚨Don’t forget to sign up for Grit Madness before this weekend! You won’t want to miss out fitness and nutrition cli...
#GRITGames Challenge 3 - Take a Walk!
Join the #GRITGames Challenge
Have a heart rate monitor? We’ll be selling them at our downtown location tomorrow (3/21) from 9-12. We’re offering ever...
Need a refresher on the [BASIC] punches we throw in our kickboxing classes or just want to watch Cody on GIF repeat 😝? C...
Make sure to JUMP on our Free 1 Week Trial while it's still available! Snag it here: https://gritboxfitness.brandbot-che...
Let's give a gritty welcome to Coach Mike! Mikes gonna be turning up the heat during his kickboxing classes on Tuesday m...
I've had way too much fun this summer