Fitness Goals Support Group
This community is dedicated to group support around achieving fitness goals, whatever they may be, through personal training, athletic activites, or other strenuous activity. Whether you are trying to get fit to treat a health problem, boost your mood, relieve stress, or tone your body, this group is a great place to meet other like-minded people who have similar goals.
The whole fat burning zone idea is about where the energy comes from. I'm not sure why your body doesn't target the same energy stores in the fat burning zone as when you have a higher heart rate, but that is why the fat burning zone isn't necessarily the highest calorie burning zone. At least, thats my understanding of it.
So for example, you jog at a slower pace for 3 minutes, then full out sprint as fast as you can for 30 seconds. Repeat. There are hundreds of variations on this. Check out you tube for more ideas and examples.
I like Marah's idea of interval training as it's not so hard on your joints.