Table 1.

Group characteristics.

	Gln	Placebo	p
N, Total	48	43
N, Male:Female	14:34	13:30	0.912
N, Right:Lefthanded	40:8	42:1	0.022
Age, years M (SD)	20.5 (2.5)	20.6 (2.5)	0.904
Weight, kg M (SD)	66.1 (7.7)	65.1 (7.6)	0.531
BMI, kg/m2 M (SD)	21.6 (2.5)	21.9 (2.2)	0.632
Sleep, hours M (SD)	7.3 (1.3)	6.8 (1.2)	0.086