Table 1.

Demographic Characteristics of the 160 Study Participants

Characteristic	Mean (SD) or %
Age, y	57.2 (19.7)
Sex, % female	50.0
Race, %
White	71.1
Black	21.4
Asian	7.5
Education, y	16.8 (2.7)
Body mass index, kg/m2	26.6 (4.7)
Appendicular lean mass, kg†	22.1 (5.3)
Physical activity, min/wk	125.6 (227.2)
Serum creatinine, mg/dL	0.9 (0.2)
Hemoglobin, g/dL	13.9 (1.3)
Knee extension peak torque, Nm	153.2 (61.5)

Notes: BLSA = Baltimore Longitudinal Study of Aging; DXA = dual X-ray absorptometry.

^†DXA measurements were available only in a subsample of 113 adults who were participants in the BLSA.