For Christmas, I got my "Ukrainian" a Wii Fit Plus. I figured he could use something to keep him occupied when I am not around (we live 30+ miles apart, so un-ubiquitous me can't be there ALL the time).
(photo credit to Tea Time)
And although it was a gift "to him," I have been getting my use out of it, as well. I had, in the past, played other active video games, especially DDR, but I found that to be incompatible with running due to tightening leg muscles.
The first time I got on this thing, it told me I was "Unbalanced." (Sorry about the bad shot... you can see my 1/4 star rating, though!)
So this thing weighs you and tells you your Body Mass Index (BMI). It asks you for a weight goal and timeline, if you have one. It also calculates your "Wii Fit Age" by taking you through tests that involve center-of-balance and sometimes mental calculations. The lowest Wii Fit age I've received to this posting is 20. Yay!
The Wii Fit Plus game has a variety of exercises, ranging from Yoga to Strength to Aerobics. Here's a screenshot I took after doing some of the yoga. So my balance isn't great, and by playing the mini-games also included, I have learned that it will take some time to improve it. It certainly doesn't help that I often play after I've had a workout and am already too tired to hold a good posture.
The system logs your progress, activities, and scores. You are supposed to play every day, but I am doing far from that. But even if I did, I am not sure this will help with my running at all, besides the possible controlled breathing they show you in yoga.
Do you like my little Wii character? I think it looks exactly like me. :P