IMO, more medium than high impact. I did wear it to my medium impact Zumba class and it held up pretty well. Don’t think it would have done as well in my HIIT Zumba class. What I would say it that it was really comfortable to wear as a day bra - I’m normally a 38e but went a size up and was glad that I did. This bra didn’t give me mono boob. Nor did I feel like I was wearing my boobs on my belly. Very reasonable priced for 2 bras. Straps detach at the back...didn’t see the point of that feature but it’s there..