Evolutionary tracks of stars with M = 16, 18 and 20 M_⊙, computed with different core reduction parameters as indicated, in the HR diagram. For the post main sequence phases, small dots are placed on the tracks every 105 yr to indicate the speed of evolution of the models in the HR diagram. The large circle indicates the presupernova position of the models. For comparison, tracks for 15 and 20 M_⊙ stars of non-rotating models with solar metallicity by Brott et al. (2011) are also shown.