RE: HIIT ... but with a treadmill ?
The treadmill is fine mate..ROBERT states in one of his posts the benefits of HIIT compared to normal cv workout.
I use a treadmill at the gym and find it excellent for HIIT.
Normal cardio is no where near as good as HIIT. HIIT in my opinion is less boring and a hell of alot more challenging.and also the important bit-is more productive for fat burning and reducing muscle loss.