try this 4 minute fat burning workout ... i did ...

[fishpoopoo]

...tried it tonight and i barfed afterwards. good workout.

recommended by an active duty Navy SEAL (online forum).

i started with a one mile slow warmup jog.

then did literally four minutes of this very high intensity tabata interval drill:

1) 20 seconds of hard sprinting, followed by 10 seconds of jogging/rest.

2) repeat seven more times back to back.

you'll need a stopwatch/timer.

we used to call these fartlek (fartlicks) in high school track workouts ...but these are a little more intense.

my god, this is a hard workout.

more info here:

http://www.t-nation.com/readTopic.do?id=490160

(use caution if yer ticker ain't what it used to be).