For me there ends up being four factors but unfortunately no one clear right answer.
One is that personally i tend to often need more recovery than others. In all my sports I’ve been able to dig deep–and often would go faster than my teammates–but they were ready to go the next day and i’m not. So training load has always needed to be carefully balanced and FF is no exception.
Second is time of season. In the beginning i tend to need less (because I can’t go as hard), in the middle I need much more (because I can really bury myself but my resilience hasn’t caught up) and in the later season i need less again.
Third is an element of randomness. Sometimes even after a super-hard workout, I’m inexplicably ready to go the next day.
Fourth is, how does it fit in context. You could pick no rest or lots of rest depending on what your priorities are for your upcoming training. Like the day after FF you could do hours of tempo, do it again the next day, again the next day, and plan to take a full few days easy or off when you run out of steam; you’re hitting training priorities where you really don’t need to be fully recovered. Alternatively, if you’re working Vo2max the next few weeks, you probably want to be fully recovered.
