Why don't you read the study, it states in there specifically. If you cant find it, let me know and I will highlight it.
And yes groups exercised during the study, and yes 200mg was the lowest dosage to stimulate a significant response. 125mg per week did not however induce significant changes to BMI
It is of note, even though we do not recommend it, dosages as high as 600mg per week caused no clinically significant effects on lipids and only two people reported acne.
I don't use an AI at all on 200mg.