Alonso Callejo, AntonioGarcía Unanue, Jorge FernandoGallardo, LeonorFelipe Hernández, José Luis2026-01-282026-01-282025Alonso Callejo, A., Garcia Unanue, J., Gallardo, L., & Felipe, J. L. (2025). First time doing resisted sprint training? Effects of different loads on the force-velocity profile and sprint performance in professional male and female football players and referees: a pilot study. Sports Health: A Multidisciplinary Approach, 19417381251394722. https://doi.org/10.1177/194173812513947221941-73811941-0921https://hdl.handle.net/11268/16767The force-velocity profile (FVP) is essential for understanding sprint performance, capturing parameters such as maximum theoretical force (F0), maximum theoretical velocity (V0), and power (Pmax). Effective horizontal force application, especially during acceleration, enhances sprinting outcomes. Resisted sprint training (RST) using varied loads (light, moderate, heavy) can improve neuromuscular adaptations, sprint mechanics, and sport-specific performance. This study explores the effects of RST with different load magnitudes. The hypothesis of this study claims that heavy loads (HL) in athletes with no previous experience in RST are expected to promote better results on sprint performance than light loads (LL) and no loads (CON).engAceleraciónFútbolMedicina deportivajournal article10.1177/19417381251394722embargoed accessDeporteMedicina deportivaAtletaGoal 3: Ensure healthy lives and promote well-being for all at all ages