| Objective To investigate the effect of KAATUS training combined with vibration training on bone metabolism, bone mineral density, and the strength of the lower extremity in elderly people. Methods In this study, 80 55-75-year-old men were recruited. Among them, 69 men were finalized. The subjects were divided into vibration training group (V group), KAATUS training group (K group), KAATUS+vibration training group (KV group), and control group (C group). All subjects received training 4 times a week for 36 weeks. V group: the subjects were treated on a vibration platform with a vibration frequency of 30 Hz and an amplitude of 2 mm. K group: the left and right leg, quadriceps femoris, femoral biceps, and gastrocnemius were subjected to 150mmgh of local compression, and were performed on the ground. KV group: on the basis of K group, a vibration of 30Hz in frequency and 2mm in amplitude were perform. C group: training program was performed in the ground. Muscle strength, bone mineral density, biochemical markers, and bone metabolic indexes were tested at 0, 36, and 46 weeks. Results The bone mineral density of the femurs, great trochanter, and Ward triangle, muscle strength of the lower extremities, GH, IGF-1, BGP, and BALP increased in V group, K group, KV group, and C group in 36 weeks (P<0.05). The improvement of bone mineral density and muscle strength in KV group was significantly higher than in the other three groups (P <0.05). The improvement in group V and group K was basically the same. The control group with the traditional exercise also had some improvement, which was significantly lower than the other three groups (P <0.05). Conclusion KAATUS training combined with vibration improves bone mineral density of lower extremities. The improvement with vibration training is more significant. It effectively stimulates GH and IGF-1, stimulates the growth of bone tissue, and the effect maintains for a long time after stopping the training. |