Originally Posted by
ilovecycling
What's your definition then? Most people I know are too lazy to get off their fat asses to do anything and 5 minutes of physical activity would be the end of them. If we're talking about intense efforts on a bicycle, 5 hours is more than enough to fully drain the body from head to toe. I consider that "vigorous."
Something with high intensity in it. Like playing an hour of ice hockey which is basically 20-30 45 Second sprints. Or doing a set of zone 5 intervals on the bike. A 5 hr ride is done at low to moderate intensity. Your HR doesn't generally get anywhere close to it's maximum. After an ice hockey game or a crit race I'm 'wired' and wouldn't be able to sleep. Perhaps it has something to do with adrenaline or some other hormone. I'm not wired up after a long zone 2 endurance ride, just pleasantly relaxed.