Professor, Department of Physical Medicine, Rehabilitation and Sports Medicine.

Director, Exercise Physiology Unit, Center for Sports Health and Exercise Sciences.


M.S.   University of Rhode Island

Ph.D. University of Puerto Rico School of Medicine


Research Interests

The main interest of our exercise physiology laboratory is the study of thermoregulation and fluid balance during exercise in hot/humid conditions.   We are particularly focused in understanding the implications of inadequate fluid intake when sweat losses are great during exercise, and the rise in core temperature at different dehydration levels in the field of play.   We are also studying the potential benefit of heat acclimatization to maximize exercise performance and prevent heat related illness in recreational and elite, young and adult, athletes.  Our recent work has focused on developing normative reference values for whole body sweat rate and sweat sodium concentration in athletes indigenous to tropical climate with data collected during the past 15 years in athletes in endurance, team/ball, and combat sports.  These reference values can be useful to identify athletes with above average values who may be at higher risk for dehydration, hyponatremia, and “salty sweaters” who may need Na+ supplementation.

Selected Publications

  • Rivera-Brown, A.M. and Quiñones-González, J.R. Normative data for sweat rate and regional sweat sodium concentration in athletes indigenous to tropical climate. Int J Sport Nutr and Exerc Metab.  Advance online publication. 10.1123/ijsnem.2019-0299, 2020.
  • Rivera-Brown, A.M., Ramírez-Marrero, F.A., Rosario, R.A., Frontanés, J.A Hernández, O.J.  Frontera, W.R. Sweating and core temperature in athletes training in continuous and intermittent sports in tropical climate.  Arch Med Deporte 36:86-91, 2019.
  • Rivera-Brown, A.M. Dehydration and the Young Athlete: Effects on Health and Performance.  In: Fluid Balance, Hydration, and Athletic Performance, ed. F. Meyer, Z. Szygula and B. Willk. Boca Raton: CRC Press, 2015.
  • Rivera-Brown, A.M., Frontera, W.R.  Principles of Exercise Physiology: Responses to Acute Exercise and Long-Term Adaptations to Training.  PM&R 4: 797-804, 2012.
  • Rivera-Brown, A.M. and De Felix-Davila, R.A.  Hydration status in adolescent judo athletes before and after training in the heat.  International Journal of Sports Physiology and Performance 7:39-46, 2012.
  • Rivera-Brown A.M., Ramírez-Marrero, F.A., Wilk B.and Bar-Or O.  Voluntary drinking and hydration in trained, heat-acclimatized girls exercising in a hot and humid climate.  Eur J Appl Physiol. 109-116, 2008.
  • Wilk, B, Rivera-Brown A.M. and Bar-Or O.  Voluntary drinking and hydration in
    non-acclimatized girls exercising in the heat.  Eur. J. Appl. Physiol. 101:727–734, 2007.
  • Rivera-Brown, A.M., Rowland T.W., Ramírez Marrero, F., Santacana G. and Vann, A. Exercise tolerance in a hot and humid climate in heat-acclimatized girls and women. Int. J. Sports Med. 27:943-950, 2006.