This game is TIRING!! I bought this because getting kids to exercise can be a chore. I figured this would be a good way for them to play there video game and get fit too. I could not be more happy with the results. They use it all the time and get the exercise they need. Even I have begun using it and noticed a bit of a difference. The different modes really help as well but you should be in somewhat good cardio shape to do a lot of it. If you can't get to the gym, this will help for sure and you can have some laughs with your kids. Even if it is designed around children and young adults, I found i even have benefited by using it to fill in between days at a gym.