Polarized or threshold training: is there a superior training intensity distribution to improve V̇O2max, endurance capacity and mitochondrial function? A study in Wistar Rat models: Polarized or threshold training: is there a superior training intensity distribution to improve V̇O2max, endurance capacity and mitochondrial function? A study in Wistar Rat models - Oliveira, Pedro; Anjos, Miguel; Flores, Ariane; Peixoto, Francisco; Padrão, Ana Isabel; Fonseca, Hélder (Journal of Physiology and Biochemistry: Official Journal of the University of Navarra, Spain, 2025)