Vb66- I'm a canoe-sprint athlete. During normal water trainings we do moderate to high intensity sprints (paddling) of either 200m, 500m and 1000m, ranging from 5-10 sets. I know I require carbs for these sessions, so I'll eat them before I train. On top of that, we also have 2-3 lifting sessions a week, 1 short distance (high intensity) run of about 5km and a long dist run for about 10-12km (yes I know, chronic cardio, but I can't opt out cos the whole team is training to participate in a half marathon). During the long runs I can rely mainly on fat for fuel, so I don't see the need to carb up before that. I'll usually do It fasted since its in the morning.
I'm only fasting these few days because training has paused due to bad weather, i don't think I can continue with even IF when training resumes because the volume and intensity is too high.
Anyhow, thanks for your concern!
[btw, I've heard of high level athletes doing very well with low carb, how does that work out then?]