Sildenafil does not improve performance in 16.1 km cycle exercise time-trial in acute hypoxia - Carter, E. A.; Sheel, A. W.; Milsom, W. K.; Koehle, M. S. (PLOS ONE, 2018)
Keywords: cycling; performance; supplementation; ergogenic aid; hypoxia; performance capacity; maximum; O2; load intensity; USA; endurance sports; biological and medical sciences