4/ Ignoring proper exercise form.
If you’re doing an exercise like squats or something with free weights with incorrect form, hopefully, someone will come over to help you. Then again, a lot of guys aren’t watching out for that, plus he may not know the exact proper technique himself. Obviously, without proper technique, you’re risking injury any time you do such an exercise, and if you’re lucky, you’ll just feel uncomfortable and won’t gain as much as you should from any given exercise. “Even if you don’t want to hire a trainer on an ongoing basis, I would recommend paying one for a session just to get all of the proper techniques down, whatever exercises you might be interested in,” Ettinger says.