What Is HYROX

At Out of the Box Fitness, we’re all about pushing boundaries—and HYROX does exactly that. Out of the Box Fitness is a HYROX Training Club.

HYROX is a global fitness race that blends functional fitness, HIIT, strength training, and endurance into one high-intensity event. Think of it as the perfect combination of real-life movement and competitive drive—all in a structured format that’s measurable and repeatable.

Each HYROX competition follows a set format: 8 x 1K Runs paired with 8 Functional Workout Stations
Stations: Ski Erg, Sled Push, Sled Pull, Burpee Broad Jump, Row, Farmers Carry, Sandbag Lunges and Wallballs.

Why it’s the ultimate fitness challenge

This unique setup challenges your full-body strength, cardiovascular stamina, and mental grit—making it one of the most well-rounded athletic events out there.

The scientific foundation of HYROX lies in the principles of high-intensity interval training (HIIT) and functional fitness. HIIT is a training method that has been shown to improve both aerobic and anaerobic fitness, while functional fitness exercises are designed to improve strength, power, and mobility – all key components of the HYROX race.

Anaerobic System

HYROX is an intricate test of two key energy systems in the body: the anaerobic and aerobic systems. During the high-intensity workout sections of HYROX, participants primarily utilize their anaerobic system. This system functions without the need for oxygen and is responsible for producing energy quickly. It does this by breaking down glucose into a substance called pyruvate, which is then converted into lactic acid. The anaerobic system can provide quick bursts of power, but the buildup of lactic acid that comes with this energy production can lead to muscle fatigue, thereby limiting the duration of high-intensity effort.

Aerobic System

On the contrary, the sustained running sections of the race predominantly draw on the aerobic system. This system uses oxygen to convert macronutrients – carbohydrates, fats, and to a lesser extent, proteins – into adenosine triphosphate (ATP), the chemical energy of the body. The aerobic system is slower at producing energy than the anaerobic system, but it can do so continuously for extended periods, making it ideal for endurance activities like the running segments in HYROX.

Why Train HYROX at Out of the Box Fitness?

Train with the same equipment used in HYROX competitions
Improve your endurance and conditioning
Build total-body strength with functional fitness
Train smarter with our expert group training and personal coaching
Compete or just challenge yourself — everyone’s welcome

Whether you’re an elite athlete or just starting your fitness journey, HYROX training is scalable, structured, and seriously effective.

Ready to level up? Join a HYROX training class FREE at Out of the Box Fitness and experience what your body is truly capable of. Check out our schedule here.