Michael T. Nelson, Ph.D., a 2014 School of Kinesiology graduate advised by Donald Dengel, Ph.D., is the lead author of an article published in the Journal of Strength and Conditioning Research. “Repeatability of respiratory exchange ratio time series analysis” examines the reproducibility of time-series analysis of respiratory exchange ratio. The study, based on Dr. Nelson’s dissertation research, demonstrated that respiratory exchange ratio measures and analysis via sample entropy at 30% and 60% of ventilatory threshold are reproducible.  Prof. Donald Dengel and Kinesiology lecturer George Biltz, MD, from the Laboratory of Integrative Human Physiology, are co-authors on the article.