About me
Jan
van Groen
My name is Jan van Groen. With my knowledge and experience, I help you become fitter and healthier.
My philosophy
Outside. Together. Keep going.
Since my youth, two points have been crucial to me for enjoyment and optimal results in fitness and health.
First: doing sport outside. Training in the fresh air has countless positive effects on health and wellbeing.
Second: training together. It is more fun and provides extra motivation. These two aspects form the core of Javagrow Fitness and are the basis of our training method.
From the football pitch
Sport has always driven me.
I play football myself and have played for various clubs in Germany, Luxembourg and the Netherlands. In addition, I do a lot of fitness training to improve my sporting performance on the pitch and to feel fitter and healthier in everyday life.
My life is about coaching others and being as fit as possible myself.
My development
From 60 to 75 kilograms.
In my early youth I was very thin and had hardly any muscle mass. Through continuous strength training I was able to steadily build muscle mass over the years: in 2020 I weighed 60 kg, in 2025 it is 75 kg.
My personal fitness training combines various functional strength exercises with explosive and stability exercises. In addition, I train a lot on the football pitch to improve my sprinting ability and endurance. This has not only helped me build more muscle mass, but also improved my speed, endurance and stability.
Despite daily training, I have been injury-free for four years. My fitness training not only has a positive effect on my sporting performance and appearance, but also on my health: thanks to the physiological adaptations, I feel energised and productive all day – and can fall asleep easily in the evening and get up rested in the morning.
My qualifications
Four licences, one standard.
With my expertise and my own fitness experience, I support you in improving your wellbeing and health – in improving your figure and/or your sporting performance.
- Health, fitness and personal trainer
- Fitness trainer A licence
- Fitness trainer B licence
- Nutrition trainer B licence
Languages
Four languages, one coach.
I also speak four languages fluently: German, Dutch, English and Spanish. This gives you the option of being supported and coached in one of these languages.
- German
- Dutch
- English
- Spanish
Ready?
Let’s tackle your goal.
In the free intro call we get to know each other and find out how I can best support you.
Free intro call