athlete – n. a person who is trained in or good at sports, games, or exercises that require physical skill and strength

check – v. to look at (something) carefully to find mistakes, problems, etc., or to make sure there is nothing wrong with it

complication – n. something that makes something harder to understand, explain, or deal with

rehabilitation – n. restoration especially by therapeutic means to an improved condition of physical function

respiratory – adj. related to the movement of air or dissolved gases into and out of the lungs

session – n. a period of time that is used to do a particular activity