Table 1.

Participants
Age	16.4 (.82)
% Caucasian	82.4
GPA	3.4 (.4)
SESa	22.4 (10.8)
IQb	117.6 (10.75)
Aerobic Exercise (hrs/week)c	6.2 (5.8); range: 0-18
VO2 peak (mL/kg LBM/min)	72 (10.5)
RAVLT d
Total words learned (z-score)	1.7 (.8)
Memory Retention Score	−.4 (1.5)
vMWT e
Learning (δ)	.35 (.2)
Delay Memory (Probe)
% Distance in target quadrant	67 (21)
Probe Crossings	3.7 (2.3)
Swim Time (seconds)	4.8 (1.8)
Brain Volumes(mm3)
Left Hippocampus	3942.5 (445.9)
Right Hippocampus	4126.5 (485.9)
Gray Matter	707579.9 (43137.3)
White Matter	550300.4 (39717.9)

^aHollingshead Index of Social Position

^bWechsler Abbreviated Scale of Intelligence

^cYouth Adolescent Activity Questionnaire

^dRey Auditory Verbal Learning Test

^evirtual Morris Water Task