Table 1.

Participant characteristics.

Condition	N	Race	Age V1	Age V2	Age V3
Active Training	16	W = 14	2 m, 20 d	3 m, 7 d	5 m, 10 d
	(females = 9)	A/W = 1	(SD = 6 d)	(SD = 10 d)	(SD = 11 d)
		B = 1
Passive Training	16	A = 1	2 m, 21 d	3 m, 9 d	5 m, 10 d
	(females = 7)	W = 14	(SD = 7 d)	(SD = 5 d)	(SD = 8 d)
		B = 1

The total number of participants in each group (N) with the number of females per group specified in parentheses is reported in the second column. The number of infants whose parents reported their race as white (W), Asian (A), and black (B) are reported in the third column. Infants’ mean ages at visit one (V1), visit two (V2), and visit three (V3) are reported in months (m) and days (d), and the standard deviations are reported in parentheses in columns four through six.