Slightly late to the party here, but what a great, fascinating thread. Larves it.
I started at 333lbs, I’m now 230lbs, but none of it was lost through Keto. I only just started Keto not even 3 weeks ago, with daily IF 20/4. I’ve IF’d in the past, also 20/4, but not coupled with Keto.
Two things that seemed to have helped tighten loose skin, as well as smooth out cellulite:
Daily Dry Brushing in the proper form. This supposedly helps out our lymph system as well as help circulation and makes your skin look bomb af. I get a lot of compliments just from dry brushing alone. I can attest, as I’ve been dry brushing for over a year, that it makes a big difference for me. I feel that my skin has become tighter in a healthy way, but more elasticky. Most noticeably in my biceps and triceps (bat wings!). I do weight train as well, but not diligently as I should, and still I get a great tightening effect from dry brushing. Inner thighs also have become a lot more elasicky and tight. Lower abs as well (my nightmare spot!).
Second thing I felt really helped loose skin is REAL HIIT workouts (actually getting to 95-100% max verifiably) 2-3 times a week, while in a fasted state, and staying in a fasted state until the following day. I’ve been doing HIIT for a long time now, and it definitely, to me, made a giant difference, probably due to the huge increase in HGH that the body produces during a legit HIIT session and thereafter. It’s a fabulous way to work those super fast twitch muscles, albeit a giant pain in the bawls to do a legit HIIT session; well worth it, though.
HIIT seems to be a term thrown around incorrectly A LOT these days, but I really honestly feel that it has given my skin a revamping. I’ve gotten great results from it not even on Keto. Now I’m pairing it WITH Keto, IF, strength training and I’m very excited to see the results.
I don’t have any studies to back up what I’m saying, it’s just personal experience that I thought I’d throw in there, for whatever it’s worth.