Okay, I've been reading two different theories on how cardio should be done. I want to know what was most successful for you guys. Interval only cardio for a duration of say 20-25 minutes max or the longer cardio which may include interval at times and then may include moderate? I have been reading the guy who wrote the Body for Life book and I've heard this theory before but, I have to say I really like to mix it up at times. What do you guys think?



