Data collection
BBS, fracture
The International Physical Activity Questionnaire-Short Form (IPAQ-SF) was used to measure Physical activity levels before training [All subjects were tested for anti-fall parameters and BMD before training, 6 months and 12 months post training.Anti-fall parameters include: Berg balance scale (BBS); Timed up and go test (TUGT); Functional gait assessment (FGA).Bone mineral density (BMD) measurement: The BMD of patient’s femoral neck and lumbar vertebrae were measured using a dual-energy X-ray absorptiometry (Hologic Discovery W series). The total spine and Femoral Neck least significant change (LSC) were 2.6% and 4.1%, respectively. And all operators were professionally trained and obtained the training certificate issued by The International Society for Clinical Densitometry.During the training period, all subjects were observed to count the number of falls and the fracture situation after the fall were tracked.