Secondly, 90 minutes is probably on the high end for a workout for me. If I'm pressed for time, it's closer to an hour.
Also, I don't know that I always work 9 hours a day. Realistically, I probably work a normal 8. I also often eat lunch at my desk, which shaves off half an hour from your estimated eating time.
As for chores: I pay someone to clean my apartment. I'd rather spend the time on other things.
I don't watch much TV. I also don't spend a lot of time hanging out with friends during the week. My wife and I don't have kids yet, so "family time" often consists of her and I reading or watching a movie together.
I'm sure it'll be harder to stick to this schedule when some of the above changes.
I figure if I can get my total weekday required commute down from say 2 hours to 0-0.25 hours I save roughly 500 hours a year. All of which become hours spent on things which give me a better quality of life (more sleep, more exercise, more meditation, more relaxation, more friend time, family time, etc.)
I hope an increasing percentage of folks do it in the future, because I truly think it will help make the world a better place, especially through the indirect benefits of reduced traffic, reduced pollution, reduced vehicle accidents, fossil fuel consumption, miles-o-asphalt-culture, etc.
my cf gym is full of professional people-- doctors, lawyers, and engineers and by looking at them you'd think they were gym rats.
For example, do 5 pullups, 10 pushups, 15 burpees, and 20 jumping jacks. Repeat ten times with little rest between rounds. Then jump rope a 100 times.
Should take you no more than twenty minutes. It's hard to get up from that one though.
If you love road biking, you will probably spend more time exercising then someone who loves doing a lot of high intensity interval training and cross-fit style workouts, simply because of the nature of the workout. You can ride bike for 3 hours easy when you are in shape, but there is no way you can do intervals for more than 45 minutes unless you are nuts.