9 Rookie Mistakes You Can't Believe You Used to Make at the Gym.(4)

http://www.womenshealthmag.com/fitness/workout-mistakes-you-used-to-make-all-the-time

It's a miracle you made it out in one piece back then.

4. You wore a regular bra to the gym. Before you were keeping spare sports bras in your purse and at the office, you figured wearing a regular bra wouldn't inhibit your moves that much. You. Were. Wrong.