His research interests include exercise physiology, neuromuscular fatigue, and the effects of age and sex on endurance performances. He has published more than 70 articles, many on triathlon and endurance, in Journal of Sports Sciences, European Journal of Applied Physiology, and Scandinavian Journal of Medicine & Science in Sports. He is a frequent triathlon participant, having completed 21 Ironman races, 4 of which were the Hawaii Ironman.