. 2014 Jun 15;7(6):1569–1576.

Table 3.

Comparison of lower limb skeletal muscle content, muscle strength, bone mineral density and balance function indexes for the subjects in the three groups before exercise and after 8 months (x̅ ± s)

Detection indexes	Control group I (n = 33)		Control group II (n = 30)		Observation group (n = 31)

	Before exercise	After 8 months	Before exercise	After 8 months	Before exercise	After 8 months
Bone quality index (BQI)	71.37 ± 13.27	78.86 ± 14.05^a	70.81 ± 14.75	78.31 ± 15.70^a	71.03 ± 16.30	79.27 ± 15.78^a
Lower limb bone muscle content (kg)	5.69 ± 1.02	5.89 ± 1.12^a	5.32 ± 1.05	5.75 ± 1.09^a	5.53 ± 1.09	5.90 ± 1.08^a
Hip extension strength (N)	206.26 ± 31.37	225.30 ± 32.45^a	199.76 ± 29.25	219.39 ± 27.90^a	203.19 ± 30.35	231.55 ± 29.94^a,^b,^c
Knee extension strength (N)	181.52 ± 28.71	203.57 ± 28.81^a	177.97 ± 27.55	195.74 ± 27.91^a	179.35 ± 29.01	213.55 ± 28.30^a,^b,^c
Comprehensive shake index (°)	5.22 ± 0.91	4.38 ± 0.81^a	5.30 ± 0.92	4.42 ± 0.91^a	5.28 ± 0.89	4.01 ± 0.88^a,^c
Front and back shake index (°)	4.42 ± 0.76	3.94 ± 0.56^a	4.50 ± 0.80	3.97 ± 0.79^a	4.47 ± 0.75	3.55 ± 0.73^a,^b,^c
Wavered index (°)	3.46 ± 0.58	2.77 ± 0.51^a	3.48 ± 0.60	2.85 ± 0.55^a	3.50 ± 0.60	2.62 ± 0.53^a,^c
Eyes closed and stepping in place (s)	6.09 ± 3.12	8.03 ± 3.26^a	6.11 ± 3.30	7.80 ± 3.44^a	6.10 ± 3.29	8.96 ± 3.40^a,^c

Note: Comparison of indexes for 3 groups of subjects after and before exercise;

P < 0.05;

comparison of the observation group with the control group I after exercise;

P < 0.05;

comparison of the observation group with the control group II after exercise;

P < 0.05.