Table 1. Baseline (pre-exercise) characteristics of subjects (N = 45) by group. Values shown are means (± SD) Vig 40 Vig 20 Mod 40 Mod 20 Control rB (n = 9) (n = 9) (n = 8) (n = 9) (n = 10 ) Basal sBDNF Levels (ng·ml-1) 23.0 (6.6) 24.8 (6.4) 23.9 (8.6) 28.6 (4.4) 21.9 (4.2) – Age (years) 21.6 (2.6) 20.9 (2.4) 21.1 (2.6) 21.1 (2.9) 20.4 (2.0) .09 Weekly Exercise (hours in last week) 7.3 (6.4) 8.1 (7.9) 3.9 (4.3) 4.8 (4.1) 9.7 (8.0) .01 Weekly Exercise (hours/week/6 months) 9.3 (7.6) 5.8 (2.6) 4.7 (3.7) 8.3 (5.0) 11.6 (8.3) –.05 Resting HR (bpm) 72 (9) 69 (10) 78 (14) 69 (12) 67 (11) –.17 Systolic BP (mm hg) 125.9 (12.6) 127.6 (11.8) 131.6 (12.0) 137.6 (14.1) 135.0 (13.8) .13 Diastolic BP (mm hg) 69.2 (4.4) 67.4 (7.1) 71.8 (3.3) 71.1 (6.4) 71.2 (9.2) .11 Weight (kg) 76.8 (11.9) 76.4 (11.0) 75.2 (11.4) 83.6 (18.7) 81.0 (10.6) –.01 Height (m) 1.80 (.04) 1.76 (.05) 1.80 (.07) 1.81 (.07) 1.77 (.06) –.03 Sleep (hours/day) 7.3 (.9) 7.5 (.7) 7.4 (.9) 7.1 (.1) 7.1 (1.2) .04 Caffeine intake (drinks/day) .33 (1.0) .13 (.35) .50 (.76) .69 (.70) .55 (.90) –.07 Significant differences between groups were assessed via independent-samples One-Way ANOVA and t-tests. Note that no significant differences between groups were found for the given variables. The last column gives the Pearson correlation coefficient for correlation between baseline BDNF (rB) and the variable indicated in the row for all subjects (n=45).None of the correlations were significant.Note that the self-reported measures of weekly exercise are likely an overestimate due to social desirability bias.BP: blood pressure; HR: heart rate.