So my studies will show that IF in general is suboptimal for building muscle. It’s not specific to one meal IF, but one meal IF solid be even less optimal for building muscle as you’re stimulating MPS even less often.
Any diet can be effective for most any goal, and many elite athletes aren’t concerned with optimizing muscle growth, so it’s not as relevant really.
IF has real benefits for fat loss and health, but it’s just not optimal for gaining muscle. If you can manage to do one meal, cool, but a window is much more feasible for the average person IMO.
I overspoke when I said it’s silly, but I still maintain it’s limiting. Top athletes do silly things all the time, and succeed in spite of them, not because of them. Go read Brady’s nutrition garbage lol.