I prefer an hour on the bike before breakfast. Maybe I'm just getting old (early 20's) but the impact of running fucks me up for the rest of the day, leaving me stiff and sore.
Besides, aren't you not supposed to go 100% on an empty stomach? The bike is definitely my choice for a good 60-75 minutes @ around 70% Vo2, and I leave running for the night.
Besides, aren't you not supposed to go 100% on an empty stomach? The bike is definitely my choice for a good 60-75 minutes @ around 70% Vo2, and I leave running for the night.