A practice plan is the session a coach attaches to a team calendar event, so athletes know what's coming. It's added in the Practice Plan section when creating or editing an event.
Practice plans are a team calendar feature. Club events can't have one.
A practice plan is not the same as a logged workout. The plan is what the coach sets. A logged workout is what an athlete records after training.
Controlling when athletes see the plan
You can set when a practice plan becomes visible:
As soon as the event is created
One week before the event
One hour before the event
At the event's start time
This is set in team settings, under calendar settings. Only Coaches can change it.
Changing practice plan visibility is a CrewLAB Pro feature.