The Relationship between Physical Activity and Bone during Adolescence Differs according to Sex and Biological Maturity

Table 3

Significant relationships between duration of television viewing and bone parameters for adolescent boys and girls ($n=99$).

Variables	r value	P value
Boys
FN Z (cm^3)	$-0.36$	.05
TR BMC (g)	$-0.44$	.01
LS BMC (g)	$-0.43$	.02
LS BMD (g$·$cm^−2)	$-0.38$	.04
LS IBS (g^2$·$cm^−4)	$-0.37$	.04
WB BMC (g)	$-0.44$	.02
WB BMD (g$·$cm^−2)	$-0.42$	.02
Girls
WB BMC (g)	$-0.35$	.03

Variable definitions: BMC, bone mineral content; BMD, bonse mineral density; FN, femoral neck; IBS, index of bone structural strength; LS, lumbar spine; TR, trochanter; WB, whole body; Z, index of bending strength.