Does anyone have an sources on this? I love the idea of playing video games to lose weight, just not sure how effective it is. At the end of my exercises it tells me your burned x calories, but not really sure how reliable the numbers are.
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My girl friend and I used Your Shape (Xbox360 with Kinect) and in her case the calories indicated by the game were actually too low compared to what her Polar was indicating. Now by no means is this scientific or calibrated, but at least it means they're a nice estimate.
I'd say there's three things that are important:
And off course Kronos is absolutely right: if you eat more than you burn during the workouts, you don't loose anything... But! as your fitness improves, so will your metabolism, so it's OK-ish to eat a little bit more, but then you have to promise me that you'll do an extra two sets of Wii Tennis!
This image shows different games and their metabolic equivalent task (MET):
YES! but with a caveat: as with any other diet or workout plan, you have to stick to it. My sister-in-law everyday would workout using the Wii Fit. This included walking/running around the house for a half hour each day, doing yoga stretches, etc. Combined with a diet, she lost close to 26lbs in the course of a year. She still, to this day, wakes up early and works out using the Wii.
Sorry this is such a terrible picture, my cell phone was all that I could use at the time.
Her workout consisted of on average a 30 to 45 mins of aerobic workouts, and may have included others, such as stretches, or strength building exercises. Her main 'game' she used was Wii fit Plus, but now uses EA sports Active and says that it is better.
A man going by the name of DeLorenzo has also claimed to have lost weight using the Wii:
You don't necessarily lose weight because you burn more calories, even if you do so consistently. Using more calories will make your body demand more calories as well, i.e. you will be hungrier. So unless you control intake somehow, it will probably not have any effect at all on your weight.
The same goes for higher metabolism from more muscle as well, it's not sure that that will make your net calorie balance change.
The only way of being sure you lose weight is to control the number of calories you eat and adapt them to your expenditure. If you don't want to do that, and you typically don't, if you aren't a professional athlete or make it a big part of your life, you have to change how you eat and what you eat.
Hunger is not the only factor that determines calorie intake, appetite and habit are other ones. If you always have access to calorie-dense food, you will eat more because it will reward you more. On the other hand, if you have a habit of eating home cooked food, if you buy groceries when you're not hungry, and so on, you will eat what you have, because laziness and habit are more powerful than gluttony ;)
There is also some evidence that fructose changes your hunger levels.