Just sharing my own experience. I've been doing Keto + IF for two months now. I cycled all winter indoors on Zwift, put in about 1000kms, but over the winter still gained another 8lbs or so even with riding 50-80kms per week all winter. Since I started IF with keto the end of April I've shed 28lbs now, and I've had no drop in my power! I did an FTP test back in March and another last week and I've gone from 180w to 183w, I was hoping to just not drop power. The first week was rough - felt like a flu, but now I feel like I have the energy I always assumed people were lying about having
Anyhow I saw this thread and discussion and thought I'd chime in, I couldn't be happier having tried this out now after slowly gaining weight over the last 15 years. The hills are still rough, but much better than they were 3 months ago.