Continue writing the next sentence.

How to work out quietly
Focus on your breathing.
No one likes being next that guy at the gym-either on the treadmill or in the weight room-who seems to be over-exaggerated his breathing. Intense huffing and puffing can be distracting to others, so focus on how you're breathing to control and regulate your breath.
Focusing on your breath will help bring your attention to the sound, depth and rate of your breathing. This can help keep you a little more quiet, but may even improve your workouts.