OK being the old lady here….I have been through it and all of my clients have to!
I suggest patience and alot of it!
Gentle reminders about the importance of exercise pertaining to mood, weight, overall health etc.
Provide support and don’t take their mood swings personally!
Boxing is one of my favorites when I feel a woman is really having “one of those days”!
I don’t think any certification can help one with this, I think it’s about being compassionate and kind.