Most of us have shared gym space with someone who doesn't quite "get" gym etiquette. So here's a primer on everything from what to wear, what to say and when to keep quiet.
"I think a lot of people want to come to the gym and exercise and they want to be appropriate, but I think they don’t know what that means, or they don’t care," says personal trainer, Irene McCormick.
Your parents should have taught you the first lesson of gym etiquette - pick up after yourself.
"Your mom doesn’t work here so you need to put it away," says McCormick.
From weights to resistance bands, it all has its place. Cleaning up also means disinfecting the equipment after each use.
"Be courteous to other people. Clean up after yourself. No one wants to lie down on a bench that’s covered in sweat."
No one wants to see too much skin either.
"You want to be able to dress in such a way that you don’t have to be concerned that any of your body is showing that shouldn’t be when you’re exercising."
Sharing is another lesson we should have learned a long time ago. Try not to monopolize equipment and don't be bashful about asking to share.
"Very politely walk up to them and say, 'Do you mind if I work in with you?'"
But there are also times you should keep your mouth shut. Don't offer unsolicited advice or interrupt someone's workout.
"Talking to someone in the middle of a workout is never appropriate. Earphones are a clue that they’re zoned out and doing their own thing."
Finally, watch your language.
"Keep in mind you’re in a public space. Use language that’s appropriate."
Remember why you're at the gym. If you're not spending your time sweating, you're wasting time.