During PE theory we have been looking at diet and exercise. Our main focus has been of what sorts of foods and drinks we consume, especially before and after exercise. We have looked at keeping our bodies hydrated, and what liquids we should consume. Lastly Kilojoules is another area we have been learning about, and how many we burn during different activities.
Diet and nutrition – what foods should we be eating?
What you eat plays a big part of health, looks and performance. Our bodies run off the food that we eat so it is important that we are treating it well and giving it all the nourishment it requires. According to the website ‘gofor2and5’ it is recommended that we eat 2 serves of fruit and 5 serves of vegetables every day. It is important that you eat a balance of different foods, not just fruit and vegetables. Your daily diet should also include grains, meat and protein, fats, and dairy.
When exercising your body requires food from specific food groups. Sports and activities that require high endurance, e.g. Marathon running, triathlons, games of football, basketball, etc, require energy that is released into the blood slowly (low GI). Examples of low GI foods are baked beans, pasta, oats and most fruits.
Energy Balance and Cal/KJ – what are thy and how do they work?
Cal and KJ are abbreviations for the terms Calories and Kilojoules; these terms are 2 different ways of measuring energy. It can be quite confusing though as often food is measured in kilojoules and exercise in Calories. This makes it tough to compare the two, however there is a way of transferring Calories into kilojoules, this is the method:
1 Calorie = 4.184 kilojoules
So if you took a food, potato for example, and wanted to find out how many calories in 100 grams this is what the method would be:
251(amount of kilojoules in 100g of potato) ÷ 4.184 = 59.9 Cal (in 100g of potato)
Energy within food comes from 3 different...