A reformer is an apparatus. Pilates, I think, is subdivided into floor and apparatus Pilates.

Look up images of video, Blueberry, as it is hard to explain in words this complex apparatus with moving parts, a tower, a box, a pulley, colored coils and what not.

I liked it! If I end up going on an FMLA, and I might since I am having racing thoughts even on Lybalvi now and they make virtually impossible to focus on what I need to ideate at work, I will sign up for a small group Pilates reformer class. Just 4 people in a group, in the mornings, and hence incompatible with a regular work schedule but within reach if I stay home for a period of time.

I really liked it. It allows superior isolation of core muscles and works them better, I think, than my personal training sessions
.

So I did that in the morning and now, before bedtime, will go for a walk wearing my weighted vest.