Fortius Fitness was created by two of Denmark’s leading personal trainers, Joan Lang and Kasper V. Christensen (pictured), who have together amassed more than 30 years of experience in training others.

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Fortius Fitness clients span from complete beginners to professionals, and many of those seeking us out have been through everything from fad diets to other personal trainers – but without lasting results.

Both clients and trainers live by Fortius Fitness’ simple, straightforward concept, consisting of clear, efficient strategies for diet and exercise that lead to impressive results in just weeks or months, along with easy, manageable maintenance of progress thereafter.


If you’re looking to make lasting changes to your body, then Fortius Fitness is for you. Our simple concept and strategy give outstanding results in the shortest possible time, regardless of your gender, your age or your training experience. You can exercise with your trainer whenever you have the time, any day of the week.

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Our trainers aren’t genetically gifted, nor do they live at the gym. And nor are they bound by strict, demanding diets. We have a unique approach to training and diet because at some point in our lives we’ve struggled with our own bodies, so we know what we’re talking about and how we can best help.

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Get a sleek fitness center with top-notch equipment almost completely to yourself! When you’re working with your trainer at Fortius Fitness, there’ll never be more than one other trainer with clients present – so no one around to stare or eavesdrop. The best surroundings lead to the best results.

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We can guarantee results or your money back if you follow our simple guidelines, thanks to our easy dietary principles and straightforward exercise methods, ones that have already helped tens of thousands of clients. Check out what our awesome clients have accomplished regardless of starting point and age. If they can do it, so can you.

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Kasper and Joan have both been through their own sets of struggles with and against their bodies, giving each a personal portal to the world of training.

What they both had in common was that the only solution to offer the results they both wanted was strength training 2-3 times per week and a simple approach to diet.

Kasper was quite a skinny, lanky young man, and this had an effect on his self-esteem.

After years of experimenting, he finally found the right formula for effective exercise and diet. Things picked up fast from there.

Among other achievements, he had soon graced the cover of a fitness magazine and received top-tier rankings in 8 fitness competitions.

All this without the use of performance enhancers, as Fortius Fitness is strongly opposed to such things.

Since then he has coached over 10,000 clients in his effective strategies.

fortius fitness coach

Read Kasper’s full story

When Joan was younger, she came dangerously close to wearing out her body through circuit training thanks to her job as a group fitness instructor.

The pain reached the point where she had to crawl out of bed in the morning and start seeing a physical therapist regularly.

Seeking help from Kasper, she finally got the strong, healthy, pain-free body she wanted.

This having whet her appetite, she received further education through Kasper before going on to garner – among other things – several prizes in fitness competitions at a mature age and after having given birth three times.

Today she has thousands of happy clients in the books.

female fitness coach

Read Joan’s full story