Top: effects of rotation on lithium depletion during the PMS for 1 M_⊙ models. The non-rotating model is indicated by the dotted line, while the dashed and continuous lines correspond to rotating models that only include the effects of rotational mixing and a full treatment of shellular rotation, respectively. These rotating models are computed with the same initial angular velocity and disc lifetime. The tracks end when the ZAMS is reached and a triangle indicates the end of the disc-locking phase. Bottom: location of the mass coordinate of the base of the convective envelope. The track corresponding to a rotating model that only includes the effects of rotational mixing is superimposed on the track of the non-rotating model.