[Lisa~]

I'm with Brenner and think that "Fat Loss Zones" are bs. Maybe this short article by Kelly Baggettt will explain it better than I can.

Aerobic vs. Anaerobic Exercise – Which Burns More Fat?
By Kelly Baggett

Fat is not actually burned much during exercise unless you are doing relatively light exercise. The percentage of calories the body uses that comes from fat when you take a leisurely walk or sleep is relatively high, so, in essence, those could be considered fat burning activities. However, the total energy expenditure during these activities is so
low that it doesn't make much difference if 90% of the calories you burn come from fat - 90% of nothing is still nothing! This explains why sleeping isn't a good form of exercise and won't do a whole lot for your physique even though most of the calories you burn
during sleep come from fat!

Fuel selection during exercise works like a pendulum. If you exercise at a high intensity, involve multiple muscle groups, and burn a lot of carbohydrates by performing something like a full body weight training session, it just causes more fat to be burned after exercise for things like glycogen storage and protein synthesis. The majority of research shows that as far as real world fat loss goes, it doesn’t really matter whether you burn fat or carbohydrate for fuel during the workout itself. Rather, total energy expenditure, metabolic stimulation, and 24-hour calorie balance is what matters. If you burn glucose during exercise, you tend to burn more fat the rest of the day. If you burn
fat during exercise, you burn more glucose during the day. This explains why athletes like sprinters and gymnasts, who NEVER burn fat during exercise, are so very lean.

The guy who squats intensely burns more fat walking to the water fountain in between sets then the walker does meandering around the neighborhood for 30 minutes!

How effective is a full body weight training workout for metabolic stimulation and fat loss? In one study a group of people did a simple workout consisting of 4 sets of 10 for the squat, bench press, and power clean. Their energy expenditure was monitored both
during the workout and over the next 48 hours. They burned about 350-400 calories during the 1/2 hour workout itself. However, over the next 48 hours they burned an ADDITIONAL 700 calories above baseline in addition to what they burned in the workout. The amount of metabolic stimulation from the workout sped the metabolism up to such an extent that the body burned an amount of calories over the next 48 hours
equivalent to 1/5th of a pound of fat! In contrast, 45 minutes of regular cardio will burn about the same number of calories during the exercise session itself, BUT, it will only spark the metabolism to burn about 50 additional calories above baseline during the 48
hour post exercise period. Which sounds more effective to you?

Intense ANaerobic exercise like full body weight training creates waves throughout the whole body that not only stimulate protein synthesis but also stimulate the entire body to behave in a much leaner fashion. The nervous system is stimulated (think natural caffeine) and nutrients are directed and pulled away from the "fat" compartment and into the "lean" or muscle compartment.