Left-hand panels: radial profiles of for {0.6,0.8,1,1.2} M_⊙ stars at different ages: the beginning of the PMS (solid orange line; labelled bPMS), the mid PMS (dashed red line; labelled mPMS), the ZAMS (dashed green line), the middle of the MS (dashed blue line; labelled mMS), the end of the MS (dashed purple line; labelled eMS) and the solar age for the 1 M_⊙ solar-type star (solid black line; labelled Age ⊙); r/R_s is the normalized radius, where R_s is the radius of the star. The critical convective Rossby number giving the transition between the rapidly and the slowly rotating regimes is represented by the solid thick grey line. Right-hand panels: radial profiles of E_RC/E_NR (and ν_T;RC/ν_T;NR, H_bg;RC/H_bg;NR and l_RC/l_NR; solid line), H_bg;RC/H_bg;NR (dashed line), N_RC/N_NR (dot-dashed line) and Ξ_RC/ Ξ_NR (dotted line) for each stellar mass at the mid PMS (in red) and mid MS (in blue).