.. Bruce Lee died from an allergic reaction to a pain killer that caused Encephelitis.It had nothing to do with his workout regime..
8% from 11% isn't going to save your life. Now if you're 15-16 and want to get down to 10-11 that's a different game!
if you eat excessive amounts of carbs for your lifestyle, whether thats sedantry or not, it will result in the storage of the excess blood glucose as fat. That doesn't just apply to fat people with diabetes, but to everyone. Raising insulin levels rapidly will bring about a greater amount of that glucose being converted and stored as fat. That's why refined sugar is particularly bad for you (except after very intense excercise), easily as bad as eating excessive amounts of fats. Fruit on the other hand is generally good. That is bascially the premise of diets which focus on low Glysemic Index foods. And as for the thread subject: How the hell could you eat "all" protein? I can't think of any food that is all protein. Not to mention how unhealthy it would be. Like the other guys said, your body would just convert the excess protein into energy rather than muscle repair/building, only it is a less effecient means than obtaining that energy than through carbs. Get the balance between carbs/fats/protein/nutrients. There are general rules to obtain optimum results, but you also need to tweak those rules a little to get the correct balance for your body and activity levels.
You should not drop your body fat below 11% in boxing I am being dead serious not in this sport, your body has what is called essential fat, its basicly to protect your internal organs if you dip down to low you can get seriously hurt.
Insulin does its job unless you eat more than you expand, just like I said. The glucose in fruit boosts insulin levels just as much as refined sugar. Raising insulin levels, if you are not over eating, will result in glucose being taken in by muscle. If those muscles never need glucose the hormone becomes obsolete. Insulin spikes or not, if you over eat, it will be converted to fat. Refined sugar is always bad because it's empty, it has no nutritional value meaning it does not provide you with minerals, vitamins and fibers. Glycemic index is irrelevant unless you are diabetic or in danger of becoming one. If you desperately want an index to select them by, perhaps an ORAC rating is more useful.
Yes you are right if you over-eat, that will be converted into fat. That is obvious and beyond question. If we look beyond that remedial level of understanding concerning the role insulin plays in glucoses storage as fat I think you'll find that it has been generally accepted for some time and pretty uncontroversial to say that sharp increases in blood sugar levels ultimately affect how fat is stored. The hormone isn't obsolete once muscles have reached storage capacity of glycogen. Blood glucose levels are not only determined by the amount of carbohydrate digested but also by the rate at which they are converted into glucose. Carbs rapidly converted into glucose cause blood sugar levels to become high. If the digestive system pumps glucose into the blood stream faster than insulin can convert it and move it into the muscles and liver or if glucose stays high too long, the body convert the excess glucose into fat. If blood glucose levels are moderate more of that glucose is burned or stored in muscle/liver. High glucose levels, more fat storage. But also this rapid insulin production subsequently brings about low blood sugar levels, which are also undesirable for obvious reasons. Continued sharp increases in insulin production brought about by high blood sugar levels also builds insulin resistance in cells. Sharp and high increases in insulin also prevent the release of glucagon and growth hormones which burn fat and sugar and determine muscle development. This is why refined sugar etc is bad for you and not only because it is devoid of nutritional value. And this is why insulin levels have generally been seen to be an important aspect of nutrition for all people (and particularly athletes and those attempting to lose weight) and not just diabetics.