losing 5-10 lbs in 5 days by consuming 900 calories/day, what happens?

[bakemeacookie]

that's one of the primary debates within the UoMinnesota athletic department.. when does the body start using protein in the place of stored fats in the environment of exercise..

the current teaching is that the body does not want to use protein (either from muscle or organs) but will instead use glucose (of coarse) then fatty acids in the blood, and stored fats for energy..

so the debate is if 300-400 cals of glycogen are what is stored around the liver, once that is used up due to activity/exertion, what level of energy/power is lost..

You see fat loss is not the desire in the study, but rather performance of the athlete..

High Intensive workouts (Hrt = 65% + capacity) in a glycogen deficit condition is not desirable, as performance will be effected, however low intensity workouts in a glycogen deficient condition are very desirable for fat loss given that the refeed, and subsequent caloric intake is limited to replenishing the daily requirements of the body only..

For these q's - I would suggest reading Lyle Mcdonalds books - he really goes into excruciating detail about protein sparing, glucose, etc. Even many free articles on his site.

From what I know - the brain, some tissues, etc. only like to use glucose. They don't use fatty acids. Therefore if you go low carb - you will NEED protein. If enough protein is not present - it will go to the muscles.

The reason why it's essential to get enough protein when you go very low calorie.

and yes, high intensity workouts can only used stored glucose for it's energy. In a low calorie diet - you are very low on glucose in the morning, so high intensity really is out. You can try but you will bonk out fast.

Which is okay - weight loss is 80% diet anyways. Many like to do relaxing low intensity or weights. Which is good for it conditiosn them to continue doing them in the maintenance phase, which is vital - for most people get fat because they simply go back to their old habits. Overeating and not working out.

 

[SpyWizard]

For these q's - I would suggest reading Lyle Mcdonalds books - he really goes into excruciating detail about protein sparing, glucose, etc. Even many free articles on his site.

From what I know - the brain, some tissues, etc. only like to use glucose. They don't use fatty acids. Therefore if you go low carb - you will NEED protein. If enough protein is not present - it will go to the muscles.

The reason why it's essential to get enough protein when you go very low calorie.

and yes, high intensity workouts can only used stored glucose for it's energy. In a low calorie diet - you are very low on glucose in the morning, so high intensity really is out. You can try but you will bonk out fast.

Which is okay - weight loss is 80% diet anyways. Many like to do relaxing low intensity or weights. Which is good for it conditiosn them to continue doing them in the maintenance phase, which is vital - for most people get fat because they simply go back to their old habits. Overeating and not working out.

isn't that the truth..