Left: Exponential relation found between the PTP of BIS data for each star and A(Li) [top panel]; the PTP of FWHM data for each star and A(Li) [middle panel]; the median of Hα06 data for each star and A(Li) [bottom panel]. The data points are coloured according to the υ sin(i) of each star. The black line is the line of best fit. In these plots we also show the Pearson Correlation Coefficients (ρ) between the activity proxies used and υ sin(i), all of them being very strong (> 0.6). Right: No relation found between the mean and median of Hα16 data for each star and A(Li) [top and middle panels, respectively]. Here again the data points are coloured according to the υ sin(i) of each star and ρ between the activity proxies and υ sin(i) is also shown, being weak in both cases. In the bottom panel we show the exponential relation found between υ sin(i) and A(Li). The data points are coloured according to the strength of the correlations of ρ_w(BIS) to demonstrate that the majority of correlations found for this indicator appear for moderate and fast rotators (υ sin(i) >5 km/s). The black line is the line of best fit.