Yo you gotta check out my girlfriend and I's new crush:
http://www.youtube.com/user/zuzkalight?feature=results_main
Some of her workouts are pretty fucking intense, and they dont require a whole lot of gear, and are like 20 mins long or less.
Im at an age where I cant afford to stop. I sit at a computer for most of my day. I refuse to let my chi dwindle.
I wake up early and spend a few minutes breathing, then stretching. I do some quick bodyweight exercises to get my blood flowing, caffinate, then hit the gym. After that I am at a desk, but ive devised quite a few ways to keep myself pretty pumped up all day. You just have to be clever if you have an office job. Some examples of things I do are holding stances for a minute here or there in a bathroom stall, and practicing active meditative breathing. If there is a big side stairwell, I might pop in there 2-3 times a day and practice shadow boxing some random box or bullshit hanging from the ceiling. When I head out to get lunch, I drop and do like 50 knuckle pushups on the nastiest piece of sidewalk I can find. Couple times a week, I duck into a nearby raquetball/basketball court, and I practice reps of light punches into the poles. Lately though, there has been packs of teenagers there, so I have been jabbing/kicking telephone poles down side-streets you might see nothing but some old lady walking a purse dog. Later in the day once the building is clearing out, its easy to whip out something like 50 crunches in an area no one is looking around, or maybe do 10 hindu/mantis pushups and 10 burpees or whatever, even just stretch if nothing else. Balance on one leg, do some yoga poses, etc. When I get home if Im not real tired and lazy sometimes I practice spinning a staff, or maybe do 100 crunches real quick.
If you think you are "too tired" to step away from whatever youre doing every 90 minutes and do some random crunches, pushups, stance/position holding, or even just stretching and deep breathing, then its because you arent doing this. The less you use your body, the less useable it becomes.
Im considering new careers without so much sitting. Not sure if I can do this past 40.