Well the reason we do it is because they wanna see if you can run normally for explain: if your a over weight kid and you can’t run a mile they get so worried that they might send you to the hospital right away. They also do this so if your a lazy kid and never get out of bed and you say your body hurts then will know you just lie In bed and do anything
That's the answer to the question
The answer is “short-lived”
