Background：Trampolining is a form of gymnastics that has increased in popularity over the last decade and due to its concurrence with the formative years of bone development,it may have an important impact on bone he...Background：Trampolining is a form of gymnastics that has increased in popularity over the last decade and due to its concurrence with the formative years of bone development,it may have an important impact on bone health.However,bone density,microarchitecture,and bone strength of competitive trampolinists have not been explored.Therefore,the purpose of this cross-sectional study was to investigate the relationship between trampolining participation and（1） bone density,area,and microarchitecture;and（2） estimated bone strength and the role of muscle and impact loading in young female adults.Methods：We recruited 29 female participants aged 16–29 years for this study（n=14 trampolinists;n=15 controls）.Skeletal parameters were assessed using dual X-ray absorptiometry,high-resolution peripheral quantitative computed tomography（HR-pQCT）,and finit element analysis（FEA）.Muscle strength was measured using dynamometers.Results：Trampolinists had higher bone density at the hip and spine,greater trabecular density and thicker trabeculae at the tibia,as well as larger bones at both the tibia and radius than controls（p〈0.05）.Trampolinists also had higher muscle strength than controls at the lower body with no difference between groups in the upper body.Estimates of bone strength using FEA were greater for trampolinists than controls at both the radius and tibia.Conclusion：This is the firs study to investigate bone density,area,and microarchitecture in female trampolinists using HR-p QCT.Trampolinists had greater bone density,area,microarchitecture,and estimated bone strength than controls.展开更多
To establish a database of muscle strength of the Chinese people. The study sampled data of 843 Chinese young males all over the country. Back force, hand twisting force and arm force of four different exerting direct...To establish a database of muscle strength of the Chinese people. The study sampled data of 843 Chinese young males all over the country. Back force, hand twisting force and arm force of four different exerting directions (pull, push, adduction and abduction) were measured. Comparisons are made between the results of this study and those from other documents. Different types strength were also compared. The factors of stature and weight influenced on muscle force were analyzed. There are obvious differences of arm strength in four directions and it can be ordered as push, pull, adduction and abduction, the push force is the largest and the abduction force is the least. The significant correlation exists between different types force. Weight has an obvious influence on one's force among above three factors. The database of Chinese young males is established for the first time. Results of the study can provide help for ergonomist, the worker of occupation health and the researcher of rehabilitation.展开更多
文摘Background：Trampolining is a form of gymnastics that has increased in popularity over the last decade and due to its concurrence with the formative years of bone development,it may have an important impact on bone health.However,bone density,microarchitecture,and bone strength of competitive trampolinists have not been explored.Therefore,the purpose of this cross-sectional study was to investigate the relationship between trampolining participation and（1） bone density,area,and microarchitecture;and（2） estimated bone strength and the role of muscle and impact loading in young female adults.Methods：We recruited 29 female participants aged 16–29 years for this study（n=14 trampolinists;n=15 controls）.Skeletal parameters were assessed using dual X-ray absorptiometry,high-resolution peripheral quantitative computed tomography（HR-pQCT）,and finit element analysis（FEA）.Muscle strength was measured using dynamometers.Results：Trampolinists had higher bone density at the hip and spine,greater trabecular density and thicker trabeculae at the tibia,as well as larger bones at both the tibia and radius than controls（p〈0.05）.Trampolinists also had higher muscle strength than controls at the lower body with no difference between groups in the upper body.Estimates of bone strength using FEA were greater for trampolinists than controls at both the radius and tibia.Conclusion：This is the firs study to investigate bone density,area,and microarchitecture in female trampolinists using HR-p QCT.Trampolinists had greater bone density,area,microarchitecture,and estimated bone strength than controls.
基金Natural Science Foundation of China grant number: 31170895,11072021
文摘To establish a database of muscle strength of the Chinese people. The study sampled data of 843 Chinese young males all over the country. Back force, hand twisting force and arm force of four different exerting directions (pull, push, adduction and abduction) were measured. Comparisons are made between the results of this study and those from other documents. Different types strength were also compared. The factors of stature and weight influenced on muscle force were analyzed. There are obvious differences of arm strength in four directions and it can be ordered as push, pull, adduction and abduction, the push force is the largest and the abduction force is the least. The significant correlation exists between different types force. Weight has an obvious influence on one's force among above three factors. The database of Chinese young males is established for the first time. Results of the study can provide help for ergonomist, the worker of occupation health and the researcher of rehabilitation.
