Fig. 1

Heart rate, systolic blood pressure, pulse pressure and locomotor activity in rats with nocturnal melatonin administration at three concentrations (Mel2, n = 7; Mel10, n = 5 and Mel45, n = 8) and in the placebo group (n = 9). Graphs contain the results of two-way ANOVA. C control week, M1, M2 and M3 first, second and third week with melatonin administration. Data are visualised as individual datapoints and arithmetic mean ± the standard error of the mean