40/45mins riding each way(less on way home) but think because it’s the start of the day I end up feeling pretty drained. Maybe need to eat more porridge before heading out
For what it’s worth, my commute is around 40 minutes at each end of the day, with the majority of the climbs on the way home.
I tend to treat my commute as some kind of personal time trial which makes it quite an intense workout. I’m on an MTB too, which makes it harder work.
In the morning I just have a mug of strong coffee before getting on the bike, and eat a proper breakfast when I get to work (muesli with added kiwi/banana/protein powder & skimmed milk).
I think a lot depends on eating a decent evening meal the day before (I mean nutritious rather than big).
A 40 minute ride shouldn’t need any special food intake provided you eat properly/sensibly throughout the day.