A comprehensive glossary of sports nutrition terms that are used in sporting, nutrition and gym groups.

Amino Acid


BCAA (Branched Chain Amino Acids)

BCAA's are a amino acid that can help to maintain muscle mass on a calorie deficit diet. 

BMI (Body Mass Index)

A measure used internationally to evaluate body weight in relation to height. This calculation allows medical professionals to understand and categorise people as to whether they are underweight, normal, overweight or obese. This should only be used as a guide as it fails to take into account muscle mass and fat mass.


Calories, also known as kilocalorie (kcal) is widely used to identify the amount of heat required to raise the temperature of one gram of water one degree Celsius. Often associated to measuring the energy value of food.


Also known as carbohydrate loading, is the strategy many athletes including endurance runners use to maximise the storage of glycogen (or energy) in the muscles and liver.


The primary energy supply of the body. There are numerous types depending on the speed they are absorbed by the body. Complex carbohydrates are known to be broken down slowly, reducing appetite and supplying energy for the body over a longer period. 


Dehydration is the rapid and excessive loss of water from the body. A lack of water (or fluid) in the body can cause tiredness, exhaustion and a lack of performance.


A measurement of expended energy, see calorie.






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