Learn French: Cet homme inactif se repose plus qu'un athlète. - This inactive man rests more than an athlete.

Because plus is comparing a verb (se repose) in an affirmative sentence, you must pronounce the final 's' (so it sounds like 'ploos'). If it were comparing an adjective (e.g., plus grand), the 's' would be silent.

Why is it plus qu'un athlète and not plus d'un athlète?

When comparing verbs (saying someone does something more than someone else), you use plus que (which becomes plus qu' before a vowel). Plus de is used to compare quantities of nouns, like plus de pommes (more apples).

Why is the reflexive pronoun se used with repose here?

In French, the verb for 'to rest' (oneself) is reflexive: se reposer. If you just use reposer, it usually means to put something down, like reposer un verre (to put a glass back down).

Why is it qu'un instead of que un?

The word que always drops its 'e' and uses an apostrophe (elision) when the next word starts with a vowel or a mute 'h'. Here, it merges with un to become qu'un.