I am an avid Zumba member and tried these out to use while taking Zumba. They are comfortable for run around the house type stuff but not for any form of exercise. They do run small, so I got an 8.5 and even those were a little tight. So, I go to the gym, take my weight lifting class before Zumba. I found that the shoes are rather slippery on the bottom, so I was afraid I would fall. By the time Zumba rolls around, it just can't be done. My feet hurt so bad, I had to leave! So, I'm back to regular tennis shoes for working out and these will hang out in the closet.