B bbbbbbb New member Aug 22, 2010 #1 im a runner, and im looking for something to help me break to the next level of intensity, will breath holding excesses help my cardio strength and lung capacity, or am i just wasting my time?
im a runner, and im looking for something to help me break to the next level of intensity, will breath holding excesses help my cardio strength and lung capacity, or am i just wasting my time?
