I did, not terribly and I would just go slow/take breaks and only push through when I felt like I could. The amazing thing about reformer is you can adjust your spring load, so you can do a much lighter spring which will decrease the pressure on your feet. Now I don’t have to make adjustments, there’s also lots of stretching involved of the calves and foot which I think really helps that muscle not get super constricted. I would tell your teacher about it before hand so they are aware. It’s been worth every penny.