I know that as fitness levels go up your lungs and heart become more efficient and you need less breating and air to do the same work.
I was curious how long you all can hold your breath?
If you are curious yourself or feel like indulging me please post your results.
Any amount of pre-breathing and huffing you want to do is fine, get a watch and time between you inhale, and you exhale. Hold it as long as you think you can. Then tell us how long and also how far you usually ride.
I can't wait for the results.