Acid Reflux
Gastroesophageal Reflux Induced by Exercise in Healthy Volunteers – http://jamanetwork.com/journals/jama/article-abstract/377776?resultclick=1
Esophageal reflux in conditioned runners, cyclists, and weightlifters – http://europepmc.org/abstract/med/12750580
The impact of physical exercise on the gastrointestinal tract – http://journals.lww.com/co-clinicalnutrition/Abstract/2009/09000/The_impact_of_physical_exercise_on_the.13.aspx
Surfing as a risk factor for gastroesophageal reflux disease – https://www.ncbi.nlm.nih.gov/pubmed/19741311