Associations between Physical Fitness, Bone Mass, and Structure in Older People

Table 4

Bone mass physical fitness significant predictive values from the stepwise linear regression model for each variable in males and females.

		Balance	LB strength	Agility	Walking speed
Males
Tt.BMD 38% (mg/cm^3)	Overall (^2)	—	—	0.364	—
	Change ^2	—	—	0.248	—
	Standardized	—	—	-0.621	—
	Unstandardized	—	—	-47.736	—
Ct.BMD 38% (mg/cm^3)	Overall (^2)	—	—	—	0.37
	Change ^2	—	—	—	0.195
	Standardized	—	—	—	-0.557
	Unstandardized	—	—	—	-6.937
Ct.Th 38% (mm)	Overall (^2)	—	—	0.418	—
	Change ^2	—	—	0.230	—
	Standardized	—	—	-0.598	—
	Unstandardized	—	—	-0.575	—
Females
Trochanter aBMD (g/cm^2)	Overall (^2)	0.261	—	—	—
	Change ^2	0.042	—	—	—
	Standardized	0.247	—	—	—
	Unstandardized	0.001	—	—	—
Total hip aBMD (g/cm^2)	Overall (^2)	0.281	—	—	—
	Change ^2	0.049	—	—	—
	Standardized	0.265	—	—	—
	Unstandardized	0.001	—	—	—

LB: lower body; Tt.BMD: total bone mineral density; Ct.BMD: cortical bone mineral density; Ct.Th: cortical thickness; aBMD: areal bone mineral density. Stepwise regression model controlling for age, object length, and muscle area (for pQCT variables) and age, height, and subtotal lean (for DXA variables) as possible confounders.