De or het keepertraining?

The correct Dutch article is:

de keepertraining

Rule Words ending in -ing: almost always de. See the rule

How to use keepertraining

the keepertrainingde keepertraining
this keepertrainingdeze keepertraining
that keepertrainingdie keepertraining
our keepertrainingonze keepertraining
your keepertrainingjouw keepertraining
every keepertrainingelke keepertraining
which keepertraining?welke keepertraining?
a big keepertraining / the big keepertrainingeen grote keepertraining, de grote keepertraining