Student essay written in en (native language: French, CEFR level: B1, field of study: Sports)

I'm gonna talk about the arrival of data analysis in professional sport, it is happening since almost ten years and the result are amazing. For example, in class we learned about the job of data analyser, those people work for the best professionnal NBA's team and are there role are crucial in every matches and for futur matches. Their job is about collecting data such as : position of shoot, pourcentage of succed for every shot fired or pass received, stamina, placement of player..., and then analyse them to form graphics or other mathematical paper to give the coach tool to train and make the team better. It can also be usefull to analyse strenght and weaknesses of other teams to be able to win against them. This job also became more and more revelant in the industry domain to be able to choose which material to use in sport's clothes, basket ball, net, field...The recuters for this job also insist on choosing former athlete to be part of the data team, it is indeed more revelant to go that way since the person already has a very precise idea of the needs and background of the industry. Now that im done with this subject, i must tell you about something that I have noticed since many years : they never teach us nutrition during all these years of school and even in sports university. In fact, if you ask someone how to lose weight, they will tell you to go on a diet, which is completly irevelant since there is many more factors to consider. And indeed, we need to realise how the body actually works, how it manages and creat his energy. It all comes down to calory, we all heard about it but never actually understood what it really is, it is a measurment for the energy provided by aliments and needed from the body (it's actually a switch from the usual mesure in JOUL). From that, you can consider that the average person needs around two thousand kilo calory per day to maintain his weight (it's around one thousand to survice), so if you eat this exact number of calory, your weight will remain stable and you wont gain or lose fat. But there is even more to take in counter, first of all, every one is different and they dont have this same exact "medium" calory maintainer, it can actually wonder from one thousand five hundred kilo calory (kcal) to three thousand for certain individual, it's people with different base metabolism. Then you need to add every time the subject does any physical activity, even walking or thirty minutes or moving your leg all day can add up two hundred calory, and an exhausting sport session of any kind : four hundred calory. So, to resume everything, all you need to do is calculate every single food/calory that you ingest and substract it to the total of every single physical activity you do during the day, then you just proceed to check and track your weight for two weeks to see how it evolved. If the weight went up after the second week, you ingested two thousand kcal( after removing the calory used during your sport activity), you know your mainting calory number is below two thousand, then you just have to try for another week while reducing the number of calory you ingest.