Results day workout?

I finished my GCSE’s and A-level many years ago now but I’ve noticed when I go swimming (which I do frequently) on results day there are always lots of people who look 16 or 18 (depending on what results have just come out). who I’ve never seen before or since coming for a workout wether in the gym or pool. I could understand I they were around before or after those days(I mean I don’t mind it’s fine) but it always seems to be more on results day’s. It’s set something I’ve been wondering about why do so many ore people work out on results day. I must add It’s private health club so it’s not like just members of the general public.

TLDR Why do so many people work out on results day as opposed to other times?