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

I would talk about carbon shoes in running. This technologie is a carbon plate in the shape of shoes and the brands to sell this object speak to upgrade the performance gain of 3 or 5%. But for me is a marketing, a small part of runners use the technologie. For the brand the goal of this gain is just to increase the price of shoes. Lot of people see the higth performance of professional athlets on the marathon or on the world athletic champion and the people associated performance for shoes, but i lost their long training time. That not shoes we take performance, the gain of training is must on carbon gain. Firstly people just go run with normal shoes and the performance increase. That sociatal phenomenon to buy shoes on 250$ for "run fast". The clothes do not make the moine.