What is a Calorie?
by Ali Hale If you have any one interest in dieting (and presumably you do, if you’re reading this), you’ve almost certainly come across the word “calorie”. Maybe you have an idea what it means - in particular, you probably have the impression that too many calories aren’t good. But the kind of exactly is a calorie, and how do calories relate to healthy eating and your weight loss?
Definition of a calorie: a unit of energy
Calories measure energy, especially heat energy. One calorie is the energy required to raise the temperature of one gram of water by one standing Celsius.
In the past, the calorie was used in fields such as engineering, excepting now you’ll only at any time hear “calorie” use in reference to food energy - it’s considered bygone in other contexts.
The metric equivalent of the calorie is the joule, and some countries (such as Australia) have this to the degree that their food pluck unit. It’s easy to convert calories to joules: there are 4.2 joules in every calorie.
Difference between calories and kilocalories
One calorie is a liliputian amount of energy - so the “calories” referred to on food packaging and in premium diet patch plans are in fact “kilocalories” (also referred to to the degree that Calories - with the capital C). With metric measurements, “kilojoules” (kJ) are always used.
From this point onwards, when you see the word “calorie”, I’m discussing kilocalories.
Calories in and calories out
There are sum of two units ways in which you might want to track calories: one is how many you consume - how much energy you take in. The other is how many calories you “char” during exercise - how much energy you put out.
If you eat more calories than you need (for normal metabolic functions and for the activity which you do), then your body demise store the extra energy as fat. If you eat fewer calories than you need, your body will burn fat to make ready the extra energy.
How many calories should I have existence eating?
In the UK, the recommended daily calorie intake is 2,000 calories per day for women’s health and 2,500 by reason of men. However, the government is currently reviewing this - suspecting that our sedentary lifestyles mean that fewer calories are needed in order to maintain a healthy weight.
If you’re trying to lose weight, utmost nutritionists recommend a calorie range between 1,200 and 1,800 for optimum weight-loss. The more overweight you are to spasmodic effort with, the more calories you can eat - in the same proportion that heavier bodies need more energy just to function. This handy calorie calculator lets you figure out your personal calorie of necessity.
You shouldn’t drop below 1,100 calories, and certainly not for an extended period of time.
One word of notice - examine judicially not to get too hung up on just counting calories in what you eat. There are plenty of foods that are low-calorie but of questionable nutritional value - such as many “lite” or “low” ranges. Yes, calories matter, as they allow the energy provision of different foods to be compared - but they are by no means the only factor to consider for a felicitous diet.
- July 25th
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