BDNF and myeloid sarcoma: In terms of serum BDNF, there was no significant main effect of group (F(1,17) = 0.007, p = 0.93, ηp2 = 0.0004), time (F(1,17) = 0.004, p = 0.95, ηp2 = 0.0002), or group X time interaction (F(1,17) = 0.002, p = 0.97, ηp2 = 0.0001), indicating similar serum BDNF levels before and after GXT in MS and controls (Table 1, Figure 1a,b).