Levent Ceylan, PhD, is an Associate Professor in the Department of Sports Management at Hitit University, Türkiye. He received his Bachelor’s degree in Sports Management from Gazi University, his Master’s degree in Physical Education and Sports from Amasya University, and his PhD in Physical Education and Sports from Ondokuz Mayıs University. His doctoral research examined the relationship between the SLC6A4 5-HTTLPR gene polymorphism and aggression levels in team and individual athletes. His research focuses on exercise physiology, sports performance, athlete health, sports genetics, physical activity, sports psychology, and performance optimization. He has published extensively in international peer-reviewed journals in the fields of sport sciences, exercise, health, physiology, and rehabilitation. His academic work includes studies on inspiratory muscle training, athletic performance, physical fitness, psychological well-being, motor development, exercise interventions, and physiological adaptations across different populations. He has supervised graduate theses and has served as a researcher, advisor, and project member in several nationally funded scientific projects, including TÜBİTAK-supported studies. He also contributes actively to academic publishing through editorial and peer-review activities.