Duncan Berends

Trojan Workout instructor

My name is Duncan Berends, I am 31 years old and have been teaching outdoor training for years.
Recently completed courses

  • RKC I (Kettlebell training, 2017)
  • RKC II (Kettlebell training, 2018) (Russian Kettlebell certification, the leader in quality kettlebell instructor training since 2001)
  • PCC (training with own body weight, 2018)

I would like to transfer this experience and knowledge during the training sessions! Everyone can participate in the outdoor training courses. I come up with this myself every time. I will do my utmost to make your body as powerful and fit as possible for your personal sport goals of daily activities. Will you even let me know if you want to train with me?


  • BuitenFit Haarlem
  • Address: Schoterbos
  • City: Haarlem
  • State: Noord-Holland
  • Country: Netherlands


What others say

Martijn Bos, the creator of the Trojan Workout, is the real deal. He is a master teacher. His Trojan Workout - a revelation. He has engineered an approach to true fitness that will help you create a healthy body and mind that works for you, not against you. Enjoy the radical transformation that awaits you!

Dr. Mark Atkinson

Medical Doctor., Creator of Self-Leadership Training.

There is no doubt that the methods of the Trojan Workout are the best practice methods for those who seek fitness and strength, integrated with realistic experiences, and these are the motifs I was glad to find in this book. It is also a wonderful way to expend the knowledge of Krav Maga, as it was founded by IMI and continues to grow and improve by the new creative and gifted minds of this generation.

Avi Moyal

Master in Krav Maga, Head instructor IKMF

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Gonnetstraat 7
2011 KA Haarlem

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