Check audio for 'Tu fais du sport?'. Does not seem correct.

Question

Accepted Answer

Bonjour Hoyt ! We've now regenerated this audio example, please have a listen:
 https://french.kwiziq.com/my-languages/french/view/408 Merci et à bientôt !

Answer

Hi Helen, 
The expression is -
Faire du mieux que l'on peut = to do the best you/one can 
and here is the Kwiziq lesson for faire du sport -
Faire de, jouer à : talking about sports, hobbies and leisure activities
hence -
faire de la natation 
Mieux vaut tard que jamais !

Answer

Can you explain why there is "du" in this sentence:  "Tu fais du mieux que tu peux"  (You do the best you can). It's from a quiz.  I also noticed "Elle fait de la natation". I'm assuming that there's a 'de" after faire when it comes to sports?