I hate cardio.  Always have.  Always will probably.  I do it sometimes because I feel like my fitness isn’t complete without having a big lung capacity too.  Anyway.  When it comes to burning fat, I think you can accomplish that in a minimal amount of time, as long as you work hard.  A girl on facebook did NOT agree with me.  I would like to tell you about an “argument” I had with a certain person on facebook who will remain nameless.  She was a figure competitor, and basically said that the ONLY way you can burn fat is to do between 30-60 minutes of cardio.  I think this, in itself, is silly.  That’s like saying the only way to get from Chicago to Los Angeles is by train.  There are literally hundreds of ways to burn body fat.  I won’t go into them, and will stick with my ammo for the argument of 20 minutes of cardio.  I asked if I only did 20 minutes of cardio, would I burn any fat. She said no.  She didn’t ask how hard I was working, or if I was doing intervals or what exactly my cardio was, she just basically told me if that’s all I’m doing, I might as well go back to bed.  How does that make sense?  She also said it has to be continuous for at least 30 minutes.  None of it made sense.  Take a track and field sprinter who is all muscle.  They NEVER really do 30 minutes of continuous cardio, yet, remain at about 6-10% bodyfat.  Anyway.  I won’t go into all the details, but my point is this.  You can burn fat, in a minimal amount of time.  As long as the intensity is high, you can usually burn MORE fat than if you did moderate intensity cardio for 30 minutes.  Think about it this way.  If you jog 3 miles in 40 minutes, and I do that same 3 miles in 20 minutes, who got a better workout?  (Let’s say we are on par physically.)  I did.  And I will burn more fat, because my intensity was higher, and I was running faster.  So next time your trainer, or bodybuilding friend, or local fitness competitor says you NEED to do at least 30 minutes of cardio, remember this article.