Figure 3. Vitamin D improves responses to muscle electrically-induced fatigue or to a chemical agent.

Ventilatory response of the animals after muscle stimulation (A) and response of metabosensitive afferent fibre activity after active muscle electrical stimulation (B) or intramuscular capsaicin injection (C). The experiment was first assessed in the 6 initial groups (n = 6 per group) (right histograms) and then in the 3 final groups (n = 12 per group) (left histograms). Crosses (+) indicate that the response was significantly increased, when compared to the Vehicle group (+ p<0.05;++p<0.01;+++p<0.001).