You all gather to head over to the local indoor swimming pool. You take the school bus, and once you're there, you all change, before you go to the lockers and stow away the rest of your stuff.
You all line up in front of the empty 50-meter stretch, as the grumpy Mr. Brishevsk patrols left and right, going over the rules you must have heard a hundred times by now. At this point, it's all just a formality that you let go, until he finally gives you the cue that it's going to start.
First off, is practising for you. He stands at the rightmost stretch with a stop watch and tests how fast each of you can make 200 meters. Since you're far from the first in the alphabet, it takes a while before it's your turn, so you rather swim slowly and relaxed when your grades don't depend on it. But something is off, you can't shake off the feeling of being watched. But that doesn't matter, you keep saving energy as far as you can, which doesn't work as well as you hope.
But despite that, when you get called over, you leave the pool, walk over, get ready, and when the whistle blows, you make the jump and swim as fast as you can. One arm above, down next one over and over and with all your might, you make it to the other side, to get back as fast as you can. The way back was a bit tougher but it was still reasonable. With being at the wall again, you can boost yourself for the third stretch, in which you start really struggling to keep up your initial pace, and even despite that, on the fourth and last bit, you finally start getting slower, despite your joints feeling very strained already.
Glad that it's finally over, you slowly climb back out of the pool, only to soon be snubbed and told to make way for the next one. You were a rather big class, but nevertheless he could have been a little more polite.
Even though you are pretty used up, you're glad you can spend the next time relaxing, and slowly swim across the stretch. When after what seems like ages, it is finally over, you are really powered out, to a point where the rest of the guys are already out of sight by the time you dragged yourself out of the hall.
You catch up, but the guys and Mr. Brishevsk are already done having a shower, while you just start fetching the shampoo for your own relaxing shower before going home from a strenuous day.