Exercise revs up our metabolism (i.e. the way our bodies utilise the energy we gain from food) enabling us to stay lean. Eating certain foods also helps us lose weight and stay lean. In order to lose weight we need to program our bodies to become fat burners instead of fat storers.
Glucose, the end product of digestion and the body’s preferred fuel source is removed from the blood by the hormone insulin, and delivered to the body’s cells where it is used for energy.
If we frequently consume foods that release their sugars into the blood stream quickly (for example, white flour products, sugar, white rice) and do so to excess, we produce a lot of insulin to deal with the onslaught and our blood sugar spikes, then drops dramatically. When blood sugar spikes the excess sugar is put into storage as fat, when it drops we feel wobbly and lethargic.
To burn fat and stay lean we need to keep our blood sugar even. Foods that release their sugars slowly into the blood stream, and eaten frequently, in small amounts at a time, achieve this.
Complex carbohydrate foods contain slow releasing sugars. The ones that are the most beneficial to maintain leanness are those which have a medium to low glycemic index and a medium to low glycemic load, as these carbohydrates have the least adverse influence on blood sugar . These include non starchy vegetables, most fruit (exceptions would be bananas, raisins and mangos), oats, barley, whole meal pasta, whole rye bread, whole wheat bread, beans.
These carbohydrates contain as well water and fibre which are also important for staying lean.
Until next time, think “complex!”
Nancy