If the context is social, if you are talking to someone in an office setting or maybe to a student, then I would use words like:
to refer to that scale of "activeness", where active and calm are at two poles and calm means something like "normal" or "manageable" or "under control".
If the context is "active", like a coach calming down a football player, I'd likely use something more specific, like:
- heart rate
- blood pressure
- body temperature
because, in this case, activeness is being discussed in terms of healthy or unhealthy and calm refers to something like "stable" or "safe" or "able to sit up".
So, depending on the reason for being active, you would refer to your state of activeness in different terms.