Sorry there was an extra character in the link ... I have now fixed it (below) and it should work.
Please do the following:
1) create a navigation route with "Route Planner"
2) if you follow that route, your trainings will be assigned to this route automatically
Thanks for your reply. I do only want to use one route. However, when I click on your example/link , I get a message that the route has been deleted. Any chance of some more examples/instructions please.