On Precor Eliptical machines the heart rate monitor has a weight loss zone and a cardio zone, whats

It seems to me that you would loose more weight by working harder and increasing your heart rate into the cardio zone thus burning more calories.

If thats the case why is the lower heart rate zone called the weight loss zone.

In which zone will I get better results with weight loss around the waste?

On Precor Eliptical machines the heart rate monitor has a weight loss zone and a cardio zone, whats best?

The cardio zone is for improving conditiong of the heart and vascular system at that heart rate the body goes to the glycogen stores in the muscle for its energy.Now for fat loss or weight loss the heart rate is lower allowing the body to work at breaking down the fat stores and converting to energy.Basically slowly and stedy for longer duration allows the Body to continue digesting while expending,at the higher rate the demands seem more urgent and may result in using muscle as energy.