Rúben Francisco is an emerging researcher whose current work focuses on the study of underhydrated individuals, with a particular interest in understanding the effects of underhydration on Health and Physical Performance. His research is dedicated to advancing the field by expanding scientific knowledge on innovative methods for hydration assessment, exploring novel techniques and approaches to accurately evaluate hydration status in diverse populations. Despite being at an early stage in his career, Rúben Francisco has already authored more than 30 scientific publications, several of which have been featured in highly prestigious journals such as Sports Medicine, Scandinavian Journal of Medicine & Science in Sports, Clinical Nutrition, among others. His publication record reflects a broad scope of expertise, with contributions spanning both sports science and nutrition journals, highlighting the interdisciplinary impact of his research. Since 2017, Rúben Francisco has been teaching at leading institutions such as the Faculty of Human Kinetics (FMH) and the School of Sports of Rio Maior (ESDRM). He is also a frequent speaker at national and international scientific conferences and events, where he actively disseminates his research and shares insights with multidisciplinary audiences. In recognition of his academic excellence, he was awarded the distinction of Best Undergraduate Student in 2017, and later successfully completed his Ph.D. with the highest possible honors: unanimously approved with distinction and praise. His academic career further reflects a strong commitment to mentorship, as he currently supervises both master’s and doctoral students.