Fig. 4

Effects of intervention on (a-b) mental tiredness during exercise, (c) physical tiredness during exercise and, (d) stress during cognitive tasks. PLA = placebo; MVM = multivitamin/mineral; * = p < 0.05; ** = p < 0.01; # = p < 0.05 in females; ## = p < 0.01; ### = p < 0.005 in females; + = p < 0.05 in males