Easy.

Easy

Warm up done.

Are you ready to push your limits and become the best version of yourself? Take on the challenge today and start your journey with Colossus Flex. No pain, no gain!

Get Coaching

Get Coaching

Personal Coaching

Personal Coaching

Looking for a coach who tailors everything to your unique goals and preferences? This is your sign to make it happen. Book your session today one-on-one, fully individualized, and 100% focused on you. Available online or offline. No excuses, just results.

Beginner

Start your fitness journey with tailored guidance to build strength, endurance, and confidence.

Beginner

Start your fitness journey with tailored guidance to build strength, endurance, and confidence.

Hyrox

Dominate HYROX with expert programming designed to boost your strength, endurance, and station performance.

Hyrox

Dominate HYROX with expert programming designed to boost your strength, endurance, and station performance.

Run

Achieve new personal bests with customized plans to improve your speed, endurance, and running technique.

Run

Achieve new personal bests with customized plans to improve your speed, endurance, and running technique.

Pro

Push your limits with advanced, high-performance training tailored to elite athletes seeking peak results.

Pro

Push your limits with advanced, high-performance training tailored to elite athletes seeking peak results.

Training Plans

Looking for a training plan that aligns with your goals and lifestyle? Our ready-to-go plans are flexible, effective, and designed to help you succeed. Take the first step—start today!

Hyrox

Coming Soon

Hyrox

Coming Soon

Run

Coming Soon

Run

Coming Soon

Strength

Coming Soon

Strength

Coming Soon

Ready to take the challenge?

Stefan isn’t just a coach; he’s your partner in transformation. A Certified HYROX Coach, Personal Trainer, Nutritionist, and former military service member, Stefan brings discipline, expertise, and over a decade of coaching experience to help you succeed.

With achievements like qualifying for the HYROX World Championships, completing seven half marathons in one week, and being featured in Men’s Health, Stefan knows what it takes to push boundaries. His rule #1? Believe in yourself, take small steps, and aim to do better than yesterday.

Ready to achieve your best? Let’s get started.

Specialties: Strength-Endurance, Performance, Fat Loss, Muscle Building.

Certifications: HYROX Coach, Personal Trainer, Nutritionist.

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© 2025 Colossus Flex Personaltraining Berlin. All rights reserved.

© 2025 Colossus Flex Personaltraining Berlin. All rights reserved.