I have sciatica, and my body is very very out of balance. Specifically my right hip flexor and hamstrings are tight, my right pelvic floor and rib cage are tight, and my abs on that side . . it's like they don't exist. I've been in and out of physical therapy for years. I've read books about facilitating the mind muscle connection to fix the issue. I tried pilates in the hope to connect to my core, but couldn't do any of the exercises without hurting my back, but thankfully it did put me onto the oov. The Oov allows my body to lengthen that psoas, in a way that has never been possible before, and suddenly everything else can start engaging in a better way. I've only been using it for 2 weeks, but the progress is soooo impressive. I feel like I could write a soliloquy about the damn piece of foam, but suffice it to say I don't know if I ever would have been able to reconnect with my core without this thing. I will update as time goes by and hopefully the progress will continue to be amazing!Almost 4 months in, and I'm still crazy about the Oov, which isn't showing any signs of wear. I went from only being able to lay on it every other day, to doing 45 min a day. I can now do the double leg stretch with a yoga ball under my feet, and I can do ballet arms with my legs in table top. I hope in a few more months I will be doing a full dead bug, but I've never felt more in control of my core. It is truly waking up muscles I don't think have actively contracted in years, and makes me want to cry tears of joy at times. Make sure to pretend your legs are light as feathers, to sink your hips down into their sockets, and squeeze an imaginary ball between your legs, and of course go slow as a snail!