It is hard to define what underweight is as some people are naturally thin and perfectly healthy. Others have underlying health problems associated with their weight. There are obviously many different reasons for being underweight and it is important to address the underlying causes.
So if you are underweight with none of the adverse reasons outlined above and wish to increase your weight,Â you must be eating more calories (energy) than you are expending. Energy in (calories in) must be greater than energy out (calories out.) Below are examples and explanations of how the body puts ‘Energy In’ and puts ‘Energy Out:’
Energy in: This refers to any food or drink which contains calories/energy.
Energy Out: This refers to ways in which energy is expended in the body, this occurs in 3 ways:
(1) Through the movement of your body. Any movement produced by your body requires energy, a general rule of thumb is the more muscle fibres used to move the more calories you will be using or ‘burning’. Running on a treadmill burns more calories than cycling on a gym bike since the gym bike only requires the leg muscles to move, whereas running requires muscles throughout the entire body to work.
(2) Through the digesting of your food. Eating and digestion of food will result in ‘energy out.’ You are expending energy and burning calories when eating.
(3) Through simply keeping alive. Your body burns calories even when you are doing nothing. This is known as your Basal Metabolic rate and is the number of calories you expend merely keeping the body functioning at rest.
Consuming more calories than you expend is known as ‘Energy Surplus.’ This can be explained through the equation below:
Energy Surplus = Energy taken in (Food + Drink) > (is greater than) Energy expended (exercise, metabolism, thermic effect of feeding)
Action Plans for Underweight Issues are available in the website Club.