1 example sentence using natation.
Natation used in a sentence
Natation in a sentence as a noun
Except, of course, "salle de sport" is not an activity, and if you want to be perfectly correct about activities you should say "s'inscrire à la natation" not "à la piscine".
Natation definitions
noun
the act of someone who floats on the water
See also: floating