Hello,
i have just comes across HIT training for cardio- it states that you only need to do 30mins of exercise to get benifits, here was an example of a routine:
http://healthhabits.files.wordpress.com/2008/06/hiit-volume-and-intensity-progression-charts5.jpg
I was just wondering if anyone else uses this type of training, if so do you do it on off days or work days?