RT info:eu-repo/semantics/article T1 Can electric mountain bikes keep you just as active and healthy as traditional mountain bikes? A1 Redondo Castán, Juan Carlos A1 Izquierdo Velasco, José María A1 Ramírez Jiménez, Miguel A1 Sedano Campo, Silvia AB Introduction: The use of electric mountain bikes has increased interest in their contribution to physical activity and health, although evidence under real-world conditions remains limited.Objective: This study explored whether the transition from a conventional mountain bike to an electric mountain bike allowed the maintenance of health-related exercise intensities in a rec-reational cyclist under different assistance modes.Methodology: A longitudinal single-participant study was conducted over sixteen weeks. Four conditions were compared: a conventional mountain bike and an electric mountain bike with three assistance configurations. Heart rate, speed, power output, cadence, slope, perceived ex-ertion, and training load indices were recorded during twenty-eight outdoor rides covering seven hundred and seventy-eight kilometres.Results: Physiological differences were observed across conditions. In this participant, lower assistance and constrained modes were associated with moderate-to-vigorous intensities and reduced momentary physiological load compared with conventional cycling. On steeper slopes, some assisted modes reached relative intensities close to functional threshold power.Discussion: These patterns were consistent with previous studies describing meaningful phys-iological responses when assistance was regulated andhighlighted the influence of terrain and assistance selection.Conclusions: This exploratory study suggests that electric mountain biking may allow some us-ers to sustain health-relevant exercise intensities under specific conditions. SN 1579-1726 YR 2026 FD 2026-01-20 LK https://uvadoc.uva.es/handle/10324/81973 UL https://uvadoc.uva.es/handle/10324/81973 LA spa NO Redondo Castán, J. C., Izquierdo Velasco, J. M., Ramírez Jiménez, M., & Sedano Campo, S. (2026). ¿Pueden las bicicletas de montaña eléctricas mantenerte igual de activo y saludable que las bicicletas de montaña tradicionales?. Retos, 76, 563-575. https://doi.org/10.47197/retos.v76.117884 DS UVaDOC RD 22-ene-2026