I have always enjoyed deep breathing (pranayama) and the feeling it produces. Now studies have come out saying deep breathing can improve respiratory muscle endurance capacity by 12 %. I have tried this with success and recommend it to anyone who struggles with the endurance ascept of running.
Here is the link:
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=419707
Here is the link:
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=419707