viplim 发表于 17-3-2013 01:00 PM
不好意思,打断下
我想问 Calories, Carbs, 和 Sugar 在健身的作用是什么 ?
至于 sugar,其实是 carbohydrate 来的。 还记得 carbohydrate 的 3个形态吗 ? monosaccharide (单糖),Disaccharide (双糖),和 polysaccharide (多糖) 。我们吃的饭,淀粉,和动物的 glycogen 都是 polysaccharide。 人体只能吸收 monosaccharide,所以 polysaccharide 在人体慢慢消化后,缓慢的释放出 monosaccharide,不会造成血糖突然上升。但是monosaccharide (还有快速消化的 disaccharide) 吃进身体后会快速的被身体吸收,造成血糖突然上升;而导致胰脏分泌 insulin(胰岛素)来把它们转换成 glycogen 为储存能量。据说这对减脂不好(我也不明白为什么 insulin spike 不好。。。),所以有些大只佬说在cutting stage 需要减少 sugar (monosaccharide 和 disaccharide)的 intake。
Generally speaking, slower conversion of carbs into blood sugar is better. Here's why:
- The faster food is converted into blood sugar, the faster your blood sugar levels rise.
- When blood sugar levels are high, your body secretes insulin, its primary storage hormone.
- When insulin is present in the bloodstream, energy nutrients such as fat or carbohydrates are far more likely to be stored rather than burned.
- In terms of fat loss, this means fat is not readily mobilized from fat cells and fat burning slows or even stops.
By controlling insulin secretion, you can effectively improve your body's ability to mobilize fat from fat cells. Once mobilized from the fat cells, they are more readily burned for energy, i.e. you lose fat. This is the basic premise that most low-carb diets are based on (there are exceptions, i.e. ketogenic diets, which I will get into later in the article). 本帖最后由 jason_81 于 17-3-2013 02:24 PM 编辑
|