The basic meaning of exercise is to repeatedly perform an action or a series of actions to develop and strengthen a certain ability, especially for health or energy. Extension can mean "use", "practice" or "practice" and "execution"
Exercise can be used as a transitive verb or an intransitive verb. When used as a transitive verb, a noun or pronoun is the object.
When exercising, it is often followed by "reflexive pronoun +in+ n./v -ing", and its subject is both the executor and the receiver of the action.
When sport is used as a noun to refer to "sport", an article is added in front to refer to "a sport".