Let's take one more look at lactic acid's many body-slimming benefits:
1. Your body uses extra calories to absorb lactic acid.
2. Every workout session triggers a lengthy post-exercise calorie burn-off, melting away extra calories for hours after you stopped exercising.
3. Once lactic acid is absorbed into your muscles, they become firmer and stronger, increasing your metabolic rate.
4. Your body develops "lactic-acid tolerance", or the ability to work longer before your muscles give out. This added stamina enables you to work harder during exercise, burning more and more calories along the way.
5. Your body gains aerobic capacity, making it both more efficient at burning fat during exercise (Remember, your body needs oxygen to burn fat).
6. Lactic acid stimulates your endocrine system to produce our bodies' own natural anti-aging serum, human growth hormone, staving off the withering effects of aging and keeping your metabolic rate high.
Interval training helps us produce this totally natural weight loss product. With interval training, you can work above your "lactic acid threshold," the point at which your muscles become so fatigued they give out, for brief intervals! After each "full-out-effort" set, you work at a slower pace to give the lactic acid a chance to work its way though your system. Then onto another intense, "feel-the-burn until-you-drop" interval. Your body virtually explodes with energy in the heat of these intense, go-for-broke moments. Your muscles draw energy from every source available, namely the fat and carb stores under your skin and in your belly, and also from within your muscles themselves.
This incredibly intense way of working out generates a huge quantity of lactic acid. In contrast, on a run you have no choice but to stay at or slightly below your "lactic acid threshold." Pit interval training against long distance running in a lactic acid making contest, and minute for minute, interval training wins hands down.