Originally Posted by Machka
It seems to me that a few people have looked at that 90 minutes a day and have assumed that is one complete 90 minute workout done all at once, but it doesn't have to be. As I mentioned above, you could break it up into bits and pieces throughout the day.
Really? It takes me awhile to warm up, especially when I go running. After about 30 minutes I'm finally warmed up and loose and ready to go and... stop? Don't you start burning fat after 30 or 45 minutes of aerobic activity once all of your stored sugars are used up? It seems like you would never reach your "fat-burning zone" by stopping all the time to do your daily activities (work, school, etc.).