[jon1026]

I've read that HIIT is best done in the morning and on off days from training. Is it ok to do right after a workout for like 15 mins?

[Steveoph]

What exactly are you goals from the cardio, is it to burn fat or just for health? I like to do 20 minutes of low-intensity cardio after a workout or HIIT on off days, but if you can find the energy, go ahead and do some HIIT. I would strongly suggest getting in some BCAA's/EAA's etc. right before you do the HIIT to minimize any muscle wasting, and have a shake right after you finish.