Great to hear a fellow BJJ regular dabbling in this topic. I've been trying a few things here and there for a while, but I eventually deduced that low carb isn't really ideal for training, for numerous reasons. I found I tended to gas out earlier, particularly say, if I were to stick around and do a double class - I felt as if I simply ran out of fuel to burn after a while. I've googled a bit and read up on it but it doesn't seem to be a common combination (BJJ & LCHF that is..)Probably been posted already but ill share one of my post workout shake/treats (I do Jiu Jitsu aka BJJ not any kind of gym/lifting. For those unfamiliar with it it's a very aerobic activity in the HIIT mould).
I use one of those george foreman shake blenders (chuck the stuff in the bottle, attach bottle to blender, pulse).
Choc-Peanut Protein shake.
1 serving of Low-Carb Choc Protein Powder
Milk/Water as the liquid whatever you prefer
Full Cream to taste (gives it a super smooth consistency)
Scoop of peanut butter (unsalted)
Ice
Occasionally I'll chuck a banana in and it tastes even better.