Table 1. Participant Demographics.

	Stretching and Toning (n = 37)	Aerobic Exercise (n = 39)
Age (y)	71.4 (8.4]	74.4 (6.7)
Sex (#, % male)	16 (43.2%)	21 (56.8%)
Education (y)	16.1 (3.1)	15.5 (3.3)
ApoE ε4 carriers (#, %)	26 (70.3%)	18 (46.2%)
CDR Sum of Boxes	3.55 (1.6)	3.54 (1.99)
MMSE (units)	25.0 (3.2)	25.8 (3.3)
Lean Mass (kg)	48.9 (10.8)	48.0 (10.4)
Body Weight (kg)	79.2 (16.6)	78.1 (14.4)
Peak VO2 (mL·kg lean mass-1·min-1)	33.7 (8.0)	33.6 (5.5)

Mean (standard deviation) unless otherwise noted.