Near core rotation rates as a function of the buoyancy radius. The observed values are given by the black circles. The solid lines stand for models of angular momentum transport with different prescription: Z92 without overshooting in blue (cf. Sect. 5.1), with overshooting of α_ov = 0.15 (purple), with enhanced horizontal viscosity in yellow (cf. Sect. 5.4), with enhanced vertical viscosity in green (cf. Sect. 5.5), and with solid body enforced along evolution in red (cf. Sect. 5.3). These models have been computed for two models of 1.6 M_⊙, one (top) corresponding to the fast rotation initial conditions given in Sect. 3, and for the lowest metallicity, and the other one (bottom) to slow initial conditions and high metallicity.