The Nitty Gritty: How We Build Badasses

Charlotte Gritbox coaches demonstrating a dumbbell snatch.

From lifting heavy to striking hard, Gritbox is where you redefine what your body can handle. Our unique approach is designed to challenge your Grit and kick your body into high gear. If you’re prepared to take the first step into unleashing your inner badass, we’ve got the perfect workout to get you there. 

45 minutes. 8 rounds. Let’s get Gritty!


In just 2 rounds, we challenge you to go heavy, using kettlebells, medicine balls, and dumbbells for maximum power output. Each session focuses on either PUSH, PULL, ASS & ABS, or FULL BODY routines, ensuring a comprehensive workout that builds muscle strength and endurance. This type of workout also accelerates your metabolic rate, burning calories not just during the workout but long after you’ve left the gym. The resulting enhanced metabolic function is crucial for your body’s endurance, stamina, and overall health. 

Heavy lifting isn’t just good for the body; it also challenges the mind. It requires focus, determination, and mental toughness to push past your perceived limits, through the physical discomfort, to achieve your lifting goals. With enough consistency, you’ll be building a strong mind along with a strong body as you set your goals even higher.

Charlotte Gritbox coaches demonstrating a dumbbell snatch.
Grit Box member uses suspension straps during group fitness class.


Our High Intensity Interval Training features plyometrics, stability, and resistance training at our wall station. This active segment demands that you dig deep and push through each set as fast as possible. Expect to do high knees, bicep curls, and more in a high-intensity setting. It’s all about maximizing your calorie burn in a short period, enhancing your cardiovascular health, and even building your cognitive functions. 

HIIT sharpens your mental acuity by enhancing concentration and speeding up your reaction times. Each round requires your full concentration. The rapid decision-making required during these intense intervals translates into better stress management and mental clarity in your daily life. 


Our kickboxing rounds focus on improving your reaction time, precision, and agility as you execute each strike with purpose and power. Many people find that hitting the bag in a controlled environment can be incredibly cathartic – allowing you to jab, hook, and elbow your challenges literally and figuratively. 

Kickboxing is a mental game just as much as a physical one. It enhances your reflexes and reaction times, making you quicker on your feet and more responsive in your everyday life. The full body workout we deliver burns calories, tones muscles, and builds a strong cardiovascular system. All while boosting your self-confidence and your mental toughness to conquer every day with intention.  Check out every way kickboxing can be a major asset to you here. 

Coach Dani at Gritbox Charlotte throwing body punches.


8 rounds of fast-paced interval training in 45 minutes with brief recovery periods push you to maintain intensity over duration in our classes.  This workout is designed to do more than just  help you build muscle, it also significantly increases your metabolic rate. The brief recovery periods designed into our workouts help teach your body to recover quickly, improving your overall fitness resilience and preparing you for greater challenges—both in and out of the gym.

You In or Out?

Gritbox workouts are designed to push you to your limits and help you discover the sheer power of your will. We believe that every drop of sweat, every lift, and every punch is an opportunity to grow stronger—not just physically, but mentally too. 

Ready to unleash your inner badass? Book a class today and take the first step to becoming the best version of yourself.