To burn fat, you need to be exercising at a Fairly/Moderately hard pace, if you thought of it as a series of numbers, based on how you feel;
1- Very Very Light Exercise/ How you feel when you're chilled out, watching a film for example
2- Very Light Exercise/ How you'd feel walking around the house, making a drink for example
3- Moderate Exercise
Here is best for a warm up before exercising. You'd feel a little bit clammy with sweat & a little out of breath
4- Moderate Exercise
7- Fairly Hard
Here is best for Fat Burning. You'd feel, quite sweaty/quite out of breath, but you'd be able to manage at that pace & keep it up.
8- Moderately Hard
10- Very Hard - So out of breath you cannot speak, pouring with sweat.
I hope this makes sense, it is a variation of the RPE (Rate of Percieved Exertion) scale developed by a man called Borg.
For me, I may feel that I am between 3-4 when jogging at 6mph, but for someone else the same exercise may by 7-8. It is a self-assessed scale.
Edited by Romeo29, 01 April 2009 - 10:48 PM.