Reference
ACSM (1998). American College of Sports Medicine Position Stand and American Heart Association. Recommendations for cardiovascular screening, staffing, and emergency policies at health/fitness facilities. Med Sci Sports Exerc. 30(6):1009–18.
ACSM (2013). Participation Health Screening, ACSM Guidelines for Exercise Testing and Prescription, 9th ed. Lippincott, Williams, and Wilkins, 19-38.