We train athletes and professionals to help them reach their full potential with specific strength & conditioning training, nutrition plans, recovery tactics and day-to-day coaching.


Kaya Gezgin
Strength & Conditioning Trainer
NSCA Certified


Medals won as trainer with AH&BC Amsterdam Field Hockey Club:

2014 Gold Medal Winner EuroHockey Club Champions Cup (ECCC) Women
2013 National Champion Hoofdklasse Women
2013 Bronze Medal Winner European Hockey League (EHL) Men
2012 Silver Medal  Winner European Hockey League (EHL) Men
2012 National Champion Hoofdklasse Men




For the past few years Kaya has been Ellen’s strength & conditioning trainer. Some of their favourite workouts have been featured in her new book ‘In perfecte conditie’.

“Bedankt Kaya voor jouw enorme inspanning voor dit boek. Ik heb je soms vervloekt vanwege de helse trainingen die ik heb moeten doorstaan, maar de resultaten maken erg veel goed. Jouw liefde voor de sport werkt aanstekelijk.”
– Ellen

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© Stefan van der Kamp


The training plan we create for athletes and professionals is based on the physiological needs of their sports or job. We analyze their athletic or job profile and implement sports specific and functional exercises into their training. Considering the competition or work schedule we plan the training intensity and volume by using the periodization method. Every training session is focused on pro performance in a match, race or at work. Whether you are a football striker working on your explosiveness on the pitch or a runner who wants to beat the clock, our trainers make sure you get the results you want.


© P&I Studio


Athletes and professionals push their bodies to the limits. We fuel your performance with a customized nutrition plan to make sure your body gets the right nutrients and amount at the right time. Nutrient timing is key. We also advise you on healthy and clean supplements if needed to enhance your performance.

For a power start in the morning, we’ve included one of the favourite breakfast recipes of Ellen Hoog for you. Overnight Oats (To Go), with blueberries!


© Olle Zwemmer


To achieve extraordinary results, all circumstances surrounding the athlete or professional have to be right. Physically, as well as mentally. An integral part of Pro Performance Training is helping you to stay focused and motivated. We keep close tabs on you throughout the whole season or year with daily communication and we collaborate closely with club coaches and team trainers. In many cases we accompany our athletes at their matches, races or training camps in The Netherlands or abroad.



We operate the in-house Flow Traders GYM in Amsterdam and power the performance of their employees with sports, training and an in-house nutrition concept. We train and create company sports teams and participate in sports events. With periodic health checks we monitor their progress.



We’ve designed the Flow Traders GYM from scratch. In collaboration with the company, architects and project developers we created a state-of-the-art multi-functional gym. We used our sports knowledge and experience for this new gym concept.

In the urban forest ‘Amsterdamse Bos’ we’ve created an outdoor fitness training facility for public use together with Hockey Club AH&BC and Gemeente Amsterdam. It’s one of the most used and popular outdoor gyms of Amsterdam.



We bring our Pro Performance with us wherever we go. We travel with athletes and CEO’s to keep them fit and focused on their sports or business. We train, coach and advise athletes and professionals while traveling. We use specific training, nutrition and recovery tactics so they can perform as a pro.



Many of our clients are professional athletes. Therefore, we are used to periodization and competition deadlines. WITNESS THE FITNESS trainers are the ultimate companion if you are preparing for a match, race or season in a training camp.


Are you ready to take your performance to pro level? Call us for an intake.




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