Old School HIIT - FARTLEK!

DaveRCF

It's great that interval training has become so popular. I first started doing it 35 years ago when I was a kid running competitive track. There was a MUCH more humorous name (especially to a 13-yr old) for it though back then: FARTLEK!

http://en.wikipedia.org/wiki/Fartlek

It's a Swedish term that means "Speed Play". We used the distance between telephone poles for measuring distance when training. Sprint one pole, jog three poles and so on.

Interval training is an incredibly effective cardio workout, as long as you are "up to the challenge" because done right, there is nothing left in the tank at the end. You can also pack your workout into a shorter period of time, a definite plus in this day and age.