FES-evoked relaxations in non-treated and treated guinea pigs in presence of VitE (100 µmol L-1). (a) Effect of Hemin (10 µmol L-1) on 2 Hz (n = 5) evoked relaxations. (b) Effect of Hemin (10 µmol L-1) on 5 Hz (n = 5) induced relaxatory responses of the strips. Data are the means ±SEM of experiments (* p < 0.5).