All PRO Admin can control what activities will count for their group by selecting or de-selecting the relevant checkboxes on the PRO Admin > Group Profile page.
Example:
Once selected and saved, the relevant activities will then be updated on the group's leaderboard homepage for all group members to see.
Please note: Currently on Count.It, selected activities apply to the group as a whole, not individual challenges. Meaning, if you wish to track a specific isolated activity (aka a weekend challenge tracking just Meditation), the Admin will need to simply update their group settings accordingly for the specific appropriate timeframe and can then change back at any time.