exercise
... however if the pupil is a dayboy he/she can go home and have a different meal or could eat a lot of sweets when at home at become a little less healthier. If the pupil is a border they are on a similar diet because the choice is little at meal times, and the food has probably got the same amount of energy in it so if they are both on the rugby team and borders they should be of similar fitness. The pupils can be at different ages which is either a disadvantage or an advantage depending on how old you are, if a 20 year old was running against a 15 year old it is in the 20 year olds favour to win because his muscles are more developed because he has finished puberty and is now a man with much stronger muscles.