Membership is required if you want to train with us. To become a member you need to fill out a subscription form and pay a relatively small fee. A WUR card with Sports Rights is required and without one your subscription is not valid. Sports rights can be purchased here.

Subscription forms for De Grondleggers are available below. It helps us if you fill them out digitally. (If you can not sign digitally, you can print first.) This saves us the hassle of translating your cuneiform handwritings. Of course we will happily accept any handwritten forms if you are somehow not too handy with/keen on your computer.


If you wish to practice boxing as well as judo/jiu-jitsu, please fill out a form for boxing as the €30 contribution fee will cover all our trainings.