im 19. sooo many girls want it at the gym. whats the best opening line?

If you see a girl resting on one of the machines say something like: "Hey that ass isn't gonna train itself". Then introduce yourself and be cocky funny. Maybe arrange to workout together next week.

I also go to the gym a lot and see a lot of hot girls there but some got ear plugs in so if anyone got some tips to open them it would be great!

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IMO that's a terrible line. I'll take your word if you've field tested it and it's worked for you. But the gym is not a night club. The gym is a lot more like your friend's place. You're going to see these girls over and over as long as you keep going there. Blatantly hitting on her shows low social intelligence.

Again, think of it like your friend's place. If it's a girl you haven't seen before, it's enough to say "starting back up?" "Getting ready for summer?" If it's a girl you've seen before and you know she recognizes you, just say some bullshit like "good hustle".

The point of an opener isn't to hit on her. The point of an opener is to stumble into a conversation with her. Think of a transition to an actual conversation, so you have something else to talk about if she actually feels like talking. (Which she might not if she's in the middle of a workout.) Something like "yeah, I'm just trying to get into shape before I leave for Miami next month. ... blah blah blah."

Do NOT go cocky funny at the gym. Every guy there is a meat-head who thinks that he's the shit, and it'll just annoy her. I say just be genuine and direct. "Hey, I saw you over here and thought you were really cute and wanted to introduce myself"

In my opinion, that's the best thing to do at the gym.
I disagree, I've found direct game to be much better than indirect, but if you want to go indirect, a decent gym opener is to just ask her what she is training for. And transition from there.

I agree! The direct opener works best in this type of situation because there's just one reason that you're approaching her, so you might as well confront her with it directly.

I think that's a fair point. If you wanna go direct and hit on her, make your agenda crystal clear (in a playful way). The worst thing you could probably do is come halfway, where you approach her like dozens of other guys do, thinking you're all sly when you're completely obvious.