Omar HAMMOUDA is an Associate Professor at the Faculty of Sports Sciences at the University of Paris Nanterre (Nanterre, France). He received his PhD in Exercise Physiology and Biochemistry from the University of Carthage (Tunisia) in 2013. Dr. HAMMOUDA leads the research team “Chronobiology, Physical Activity and Health” at the Research Laboratory “Molecular Bases of Human Pathology, Faculty of Medicine, Sfax, Tunisia”. He is also an active member of the Interdisciplinary Laboratory of Neurosciences, Physiology and Psychology: Physical Activity, Health and Learning, UFR STAPS, University of Paris Nanterre, France. Dr HAMMOUDA is co-author of more than 120 scientific papers and has supervised many master’s and PhD theses in the broad fields of exercise chronobiology and biochemistry. His research interests lie in the underlying mechanisms of how physical activity interventions, chrono-nutrition and melatonin can alleviate chronic circadian disruption induced by cardio-metabolic and neurodegenerative diseases.