Variation rate of the core angular velocity Ω_c as a function of gravity for rotating models of the six subgiants. These models are computed without an additional transport of angular momentum (ν_add = 0). Magenta, red, black, blue, green and cyan lines correspond to stars A, B, C, D, E and F, respectively. Vertical dashed lines indicate the values of the gravity for the six stars. A zoom during the subgiant phase is shown in the insert.