Carl is the Director of the Human Performance Laboratory and the Research Director of the Clinical Exercise Physiology program at UW-La Crosse. Carl has over 20 years of clinical experience (at Sinai Samaritan Medical Center in Milwaukee) before coming to UW-L. Carl has a very active research program and has published ~400 scientific articles and chapters and 11 longer works (books/monographs/ position stands). Relevantly, he was a co-editor of the first ACSM Health and Fitness Facilities Standards and Guidelines and was on the writing task force for the joint ACSM/AHA Position Stand on Health and Fitness Facilities.