ORIGINAL: GMMAT
30sec-1min sprint followed by 5 minute walk, then repeat, etc
That "sounds" like someone's implying HIIT (High Intensity Interval Training)....but the "intervals" described are too long for a rest period.
You may burn more calories, but less of those calories are from fat. Low intensity workouts burn a greater % of calories from fat.
You burn the same amount of calories. THIS is where what's going INTO your body is so important. How/When you train is also important (fasted v. non-fasted).....and training "right" is important. Cardio shouldn't be done for more than 45minutes....or you WILL be burning muscle. Jury's still out on fasted cardio...and I do it a few times a week. I make sure I do that protein thing when I do. I'll take my chances.
I lost weight at a VERY fast pace in 2004 (from just under 230 to 191). It was amazing. I was also running 5mi. on an empty stomach....first thing in the morning. I lost a ton of lean muscle doing this....and I'm not going to go that route, again. Like I said....I don't care if I lose another pound....as long as I replace what I'm losing with LM....I couldn't care less.
Sorry, typo...meant to say you may burn the same amount, but high intensity workouts will burn less calories from fat (which is what Drop said) than low intensity "aerobic" exercises.