I know this site is mostly geared towards body building, and getting big muscles and all that jazz. That used to be my main goal, but lately things have changed.

I signed up for a competition to run Firefit, and I compete in two weeks. If anyone is interested what it is you can check it out at https://www.youtube.com/watch?v=se_-mhQhmZM

I've never trained for anything like this, really got into the cardio/crossfit style work outs about a month ago.

Basically my question is is it feasible to do aerobic exercise 2x a day ? Usually it consists of treadmill work on an incline, running backwards on an incline, wearing a weighted vest the whole time. Is it the same as anaerobic where you shouldn't over do it?

Any help is appreciated