8. But First, Let Me Take a Selfie
"People who check themselves out in the mirror and take selfies." - Steve C., push-up warrior
9. Wipe Up After Yourself
"Wipe up your sweat! So gross when people drench the machine with their sweat and don't wipe it up. What am I, your mother? Just wipe it up!" - Joy L., elliptical fan
More: Things Only Girls Who Sweat a Lot Understand
10. Get Off the Phone!
"If I wanted to hear drama, I would have stayed home to watch some soap operas. Get off the phone! I don't want to hear about your problems." - Fara R.
11. Locker Room Shenanigans
"People who take up all of the space in the locker room." - Maddie R., interval enthusiast
"People hanging out in the locker room completely naked. Don't they have any place better to go?" - Ryan W.
12. Grunters: We're Not Impressed!
"Massive bodybuilders who lift weights and grunt obnoxiously loud. It can be uncomfortable at times. And then after they lift, they just drop the weight on the floor, grunt some more, and walk around the gym like they won a medal or something. Just pipe down, we're not impressed!" - Julie K., jump rope champ
13. Channel Changers, Please Ask
"People changing the channel on a TV I'm watching. Can you please just ask?!" - Kim L., spin class nut
14. Is This a Photo Shoot?
"Women who put on lots of makeup to work out at the gym. Really?" - Kristen S., plank challenger
What are your gym pet peeves?
All GIFs courtesy of Giphy.com.
More: 20 Motivational Fitness Quotes
Stay in shape in a fitness class.