Today’s lesson focuses on a commonly used feminine noun la salle de sport, meaning “the gym”. The word salle often refers to a large-sized room or hall.
la salle de sport
the gym

La salle de sport – gym
Example sentences
In addition to la salle de sport, sometimes French speakers use the anglicism le gym. Hence, aller au gym. The French also sometimes simply say aller à la salle for “to go to the gym”.
Jean-Luc va à la salle de sport quatre fois par semaine.
Jean-Luc goes to the gym three times per week.
For this second sentence, faire de la musculation can translate to weightlifting or body building. The term for weights or dumbbells is les haltères (masculine noun). The preposition pour + infinitive means for or “in order to”.
Les gens vont à la salle pour faire de la musculation.
People go to the gym to do bodybuilding.