I own Dance Dance Revolution Konamix, and it's an extremely fun way to exercise! I do it for 30 consecutive minutes every day and never get sick of it! But first, if anyone has never seen it before, I'll explain:
It's really simple. There is a platform with four arrows: up, down, left, and right. You stand on the box in the center of the platform.
There are four stationary arrows at the top of the screen. There will be arrows that scroll up from the bottom of the screen. When the scrolling arrows overlap the stationary arrows, you then step on the corresponding arrow on the platform.
(I got this information and pictures from
http://www.ddrfreak.com/aboutddr.php Go to this website to learn more!)
There's many different songs to dance to, and different categories depending on the intensity you'd like to play at. For example, you can choose the "Calorie Burner" category for dances of the highest speed and intensity, or the "Downtempo Jams" for the simplest and slowest group. (Again, I own the Konamix version, so this may not apply to other versions of DDR.) I highly recommend this for anyone who hates grueling workouts, has trouble sticking with a workout routine, doesn't enjoy playing sports, and/or needs a fun way to stay fit. This is the only workout I actually look forward to doing everyday.
P.S. They have DDR for regular Playstation too!