TABLE 4.

Val66-Met66 allele BDNF expression ratio in heterozygotes.

ID	BDNF expression, Val/Met ratio (Met, % of Val)			Normalized to pre- and post-means BDNF allele expression*
	Pre	Post	Mean, SD	Pre-Val	Pre-Met	Post-Val	Post-Met
3	1.58 (63.3%)	1.04 (96.1%)	1.33 ± 0.18 (76.1 ± 11.2%)	1.18	0.74	1.15	0.77
5	1.39 (71.9%)	1.30 (76.9%)		1.28	0.92	1.12	0.84
12	1.42 (70.4%)	1.26 (79.4%)		1.10	0.77	1.18	0.94

Pre, post, rest, and post-VO₂max test conditions. *p-value of normalized Val/Met mean difference is 0.0002. BDNF expression values related to B2M mRNA.