This may not be the most popular idea.... (Score 1)

I work out everyday. Lift weights or run. I find the time to do this because I get all my work done as fast as possible so I am not sitting for 10-12 hours. Now I know that my job may be an exception to the rule being that alot managers think the time sitting at a desk equals the amount of work you output. Also, even if you work until 7pm you still have a long time before going to bed. Get a gym membership near your house ( if it is not convienent you won't go ) and spend 30 mins on the treadmill listening to your favorite music or get your tv watching in right there.