The increase in pulmonary arterial pressure (PAP) due to hypoxic pulmonary vasoconstriction (HPV) could be a limiting factor for physical performance during hypoxic exposure. Sildenafil has been shown to reduce PAP in situations of moderate or severe hypoxia, and consequently its role as an ergogenic aid and even a possible doping substance must be considered. We performed a double-blind crossover study to determine the effects of sildenafil on cardiovascular, respiratory and metabolic parameters in normoxia and during acute exposure to hypobaric hypoxia (4 000 m) at rest and during maximal and submaximal (60% VO2 max) exercise tests. One hour before testing started, sildenafil (100 mg) or a placebo was orally administered to 11 volunteers. In normoxic conditions, sildenafil did not affect performance. Similarly, no significant differences were found in cardiovascular and respiratory parameters in hypoxic conditions at rest or during exercise. The use of sildenafil to improve physical performance in non-acclimatized subjects is not supported by our data.

It remains to be seen whether longer exposure to blue light under hypobaric hypoxic conditions would induce favorable effects against fatigue.

Sildenafil has proven to efficiently reduce the increase in pulmonary artery pressure provoked by hypoxic pulmonary vasoconstriction. However, its role as a possible factor in increasing exercise performance under hypoxic conditions remains to be demonstrated. The use of sildenafil has increased among mountaineers, not as a high altitude pulmonary edema preventive drug, but as a means that could help to improve performance. Several studies have attempted to address this issue, with conflicting results. Currently, despite the inconclusive data at simulated or real altitude, and with the clear evidence that, in normoxia, sildenafil does not improve performance, this drug is being used (and sometimes overused) by people who climb high peaks. However, such potential performance improvement would depend on the degree of hypoxemia (altitude) and the individual responsiveness to this drug. This paper reviews the current knowledge on this matter. © 2015 Consell Català de l'Esport. Generalitat de Catalunya. Published by Elsevier España, S.L.U. All rights reserved. PALABRAS CLAVESildenafilo; Gran altitud; Inhibidor de PDE-5; Ejercicio; Hipoxia; Normobárico; Hipobárico ¿Afecta sidenafilo a la capacidad física en altitud? Evidencias científicas en la actualidad Resumen Sildenafilo ha demostrado eficacia reduciendo la hipertensión pulmonar provocada por la vasoconstricción pulmonar hipóxica. Su papel como posible factor para aumentar el rendimiento en el ejercicio en condiciones de hipoxia está por demostrar, pero el uso de sildenafilo ha aumentado entre los montañeros, no como un fármaco preventivo del edema pulmonar de gran altitud, sino en la creencia de que podría ayudar a mejorar el rendimiento físico a gran altura geográfica. Varios estudios han tratado de abordar este tema, con resultados

La sistematización de la presente experiencia pedagógica explica la implementación de un programa piloto de Aprendizaje Basado en Investigación (ABI) en el proceso de Formación Inicial Docente (FID) del Profesorado de Educación Física (PEF) perteneciente a una universidad chilena. La experiencia se desarrolló con clases en modalidad virtual durante el segundo semestre del 2021. El programa abordó siete temáticas en ocho sesiones de clases. El objetivo del programa piloto fue desarrollar competencias investigativas en el profesorado en proceso de FID en PEF orientadas a su área de formación de manera remota. Los resultados demostraron que el 100% de los asistentes al programa piloto mejoraron el nivel de conocimiento en cuanto a las temáticas del ABI, por otra parte, el 100% de los asistentes declaró estar satisfecho con este tipo de experiencias. Se puede concluir que la implementación del ABI en la FID en PEF se sustenta en la necesidad de potenciar el ámbito investigativo desde sus bases (estudiantes), siendo una estrategia de enseñanza-aprendizaje que facilitará la búsqueda de soluciones a los problemas utilizando una metodología innovadora que permite construir nuevo conocimiento desde sus propias realidades. Palabras Claves: Aprendizaje Basado en Investigación – Educación Superior - Metodología de enseñanza – Formación Inicial Docente – Pedagogía en Educación Física. Abstract. The systematization of this pedagogical experience explains the implementation of a pilot Research-Based Learning (ABI) program in the process of Initial Teacher Training (FID) of Physical Education Teachers (PEF) belonging to a Chilean university. The experience was developed with classes in virtual mode during the second semester of 2021. The program addressed seven topics in eight class sessions. The objective of the pilot program was to develop research skills in teachers in the process of FID in PEF oriented to their training area remotely. The results showed that 100% of the attendees to the pilot program improved the level of knowledge regarding the ABI topics, on the other hand, 100% of the attendees declared to be satisfied with this type of experience. It can be concluded that the implementation of the ABI in the FID in PEF is based on the need to promote the research field from its bases (students), being a teaching-learning tool that will facilitate the search for solutions to problems using an innovative methodology. that allows to build new knowledge from their own realities. Keywords: Research Based Learning - Higher Education - Teaching Methodology - Initial Teacher Training - Pedagogy in Physical Education.