dhs06,
I use the MIO Sportline from Walmart (i threw the box away so i don't know the model). Um. What does HIT stand for? Sorry, still getting use to the talk.

No, i don't feel like i'm going to fall over at all. I could keep going if i had time. I've done the Tae Bo basic and the Cardio too. The basic makes me tired but not too bad probably because its only like 20 minutes. The Cardio makes me real tired. . .its a longer video but i dont know how long (if that helps compare the walking i do).
Thanks for the info BTW.