I lowered a pair of rings to four inches above the floor and have been having clients work on planks and push-ups on them. It helps them get in touch with how the midsection sags on push-ups in general, and to fix it. I did two sets of five push-ups on them, then set up a six-inch height of weight plates, put my feet on it, and did two more sets of five. I love these! I’ll have to get a photo.
Prior to that, I worked on overhead squats: 2 x 5 at 70, 2 x 5 at 75, 1 x 5 at 80, and 2 x 5 at 85.