I didn’t want to chime in, because my view is heretical. I’m approaching 64 and had become skinny fat. I can do cardio all day, but wanted some body recomposition. Things have been going well on two workouts per week of 30 minute heavy weight sessions.
The problem was that the rest of the week I was wasted, feeling sleepy all day but then unable to sleep well at night.
My solution has worked perfectly. I bought a bag of dextrose and add 30 gms to my drink during the workout and 30 gms as part of my post workout (high protein, low fat) meal. That means on training days I’m taking in about 100 gms of carbs. But the fatigue disappeared from the first time I tried it, and by isolating the carbs to just one specific purpose, it hasn’t led to any disorderly eating. I’ll stick with it because, for me at least, it is working so well.
On my workout days, I finish my post workout meal about 8:00 a.m. and am keto the rest of the week until my next gym session.

I was especially interested in your mention of Creatine. I think that was the reason for my calf muscles especially but also glutes feeling sort of fuller. I didn’t think of it at first, but I re-read my info on Creatine, and how it helps get water to the muscle. I wasn’t a sore feeling at all. I do tend to try and figure things out, between possible wd sxs, or something else. Thank you for your info, as I may go ahead and use my 5 grams, which was a regular sort of rounded tsp of my Mono Creatine from NOW brand.
Keto has definitely given me more energy, trouble is I tend do over do the workouts & injure something, so this year have taken it steadier. I have arthritis in my feet too & can’t do any HIIT workouts I used to do…so focusing on weights, squats , I think the exercises I’m doing I’ve found online are pilates style strength training? I’m really enjoying it anyway. I was doing 5 or 6 days a week but now more to do in the garden & then haven’t had the energy so do 3 or so a week, have been having a few cheat days with the keto so that makes a difference, need to be stricter! I have some creatine to try as well…