These days a lot of young people decide to leave learning to express 'oneself' (to jest zle slowo. Tutaj mozesz dac 'themselves') in sport.
Firstly, these people are healthy and 'do not become' (nie, to nie za bardzo, mozesz 'are unlikely to be') ill. They have a diet high in 'vitamines' (ortog) and minerals which are necessary to be 'wholesome' (poszukaj inne slowo) and TO live longer. 'Addiotionally' (ortog),'it' (nie za bardzo wiem do czego to 'it' sie odnosi) is a good way to be a well-known person. 'The' (niepotr) Sport 'acheievments' (ortog) (tutaj daj modala, bo to nie jest gwarantowane na 100, moze 'may', 'could') make a person famous.
Every 'competitions' (nie, tutaj 'every' jest w l. poj, to rzecz tez musi byc w l. poj) and 'acheievments' (ortog - sprawdz jak to slowo sie pisze) are well-paid, therefore an athletic (ale co? musisz napisac) is a wealthy person.
If the other person has better results 'a' (zly przedimek, tutaj wiemy dokladnie o co chodzi, to wtedy 'the') career of a weaker person is finished. Moreover, 'this work' (zmien to troszeczke, moze 'this type of work) provides a lot of stress. Trying to be the best 'person' (niepotr) and have 'the' (nieptor) great performances makes a person stressed 'out' (wg mnie niepotr) 'what' (kalka z polskiego 'co' - ale w ang nie dajemy tego tak, tutaj 'which') (tutaj daj modala np. may, can,) lead to a lot of psychic 'ilnesses' (ortog).
Last but not least (tutaj przecinek) is THE fact that there is a huge risk of having an injury. After 'the' (tutaj dajemy 'a' bo jeszcze nie wiemy dokladnie ktory, to moze byc jeden z wielu) accident, an 'athletic' (myslisz slowo, masz na mysli athlete') can heal for a long time. In many cases, the injures are incurable, 'what' (zmien) (daj tutaj modala) lead to disability or even death.
In conclusion, although 'this idea' (nie, wytlumacz dokladnie ktore) has a lot of positive aspects, in my opinion the disadvantages outweigh the advantages and a sport career is not 'certainly' (zla czesc mowy) and 'safe' (poszukaj inne slowo) work.
Masz troche problemow z tymi przedimkami (a, an, the), do tego pisz uwazniej, jak nie jestes pewny to sprawdz slowa w slowniku.