1 min or less intervals… depending on the intensity, e.g. a 1km pyramid (100,200,300 to up to 1000 and back down again) is pretty much flat out, so it’s collapse, grab a drink and unlikely to get off the seat – maybe a bit of to and fro without holding the handle.
1m30s + min interval… stand up, stretch, grab a drink, then back down for last 20 secs for a bit of easy to and fro without holding the handle until start again.
2m30s + … jump on my spin bike at low resistance to keep the legs moving and drink, wipe off sweat etc! If I don’t jump on the spin bike, then I just seize up. Gives the backside a rest too as opposed to just paddling lightly.
Of course there are some other training intervals where you use the rest period to actually do more exercise(!)… squats etc, but this is nuts…

