New saturation threshold that appears naturally from fitting observational data using calculated turnover times. The global convective turnover time is very different to frequently used approximations (Wright et al. 2011), especially around and below the fully convective boundary (left panel). A lower threshold (0.04) for the Rossby number separating the saturated from the unsaturated regime is derived from fitting observations using the calculated global convective turnover time (middle panel). This causes magnetic braking to be stronger in the saturated regime as we keep the strength and slope of magnetic braking in the unsaturated regime unchanged (right panel).