TABLE 4.

Association between changes due to training in baseline cardiorespiratory fitness (VO2peak_post–pre) and changes in baseline plasma BDNF or serum BDNF (pBDNF_S4–S1 or sBDNF_S4–S1, respectively) in the whole sample (ALL) and separately in groups CE, PE, CE + PE, and PE + CE.

	pBDNFS4–S1			sBDNFS4–S1
	npairs	τb	p	npairs	τb	p
VO2peakpost–pre
ALL	92	0.11	0.882	91	0.12	0.10
CE	21	–0.09	0.61	20	0.07	0.68
PE	25	0.11	0.47	25	–0.03	0.87
CE + PE	22	0.19	0.24	22	0.37	0.02
PE + CE	24	–0.20	0.17	24	0.04	0.83

Kendall’s tau-b (τ_b) correlation coefficients and its p-values were calculated. BDNF, brain-derived neurotrophic factor; n_pairs, number of pairs analyzed. The level of significance was set at p < 0.05. Significant correlations are in bold italics.