Effects of obesity on breast size,thoracic spine structure and function,upper torso musculoskeletal pain and physical activity in women  

作　　者：Julie R.Steele Celeste E.Coltman Deirdre E.McGhee 

机构地区：[1]Biomechanics Research Laboratory,School of Medicine,University of Wollongong,Wollongong,NSW 2522,Australia [2]Research Institute for Sport and Exercise,Faculty of Health,University of Canberra,Canberra,ACT 2601,Australia

出　　处：《Journal of Sport and Health Science》2020年第2期140-148,共9页运动与健康科学（英文）

基　　金：support of the Australian Government Research Training Program Scholarship;the Sports Medicine Australia Research Foundation,which providcd partial funding towards this study。

摘　　要：Purpose:This study investigated the effects of obesity on breast size,thoracic spine structure and function,upper torso musculoskeletal pain and physical activity participation in women living independently in the community.Methods:A total of 378 women were divided into 3 groups(Not Overweight:body mass index(BMI)=22.5±0.2 kg/m^2(mean±SE);Overweight:BMI=27.4±0.3 kg/m^2;Obese:BMI=35.4±0.3 kg/m^2).Outcome variables of breast volume(mL),thoracic flexion torque(N·m),thoracic kyphosis(degrees),upper torso musculoskeletal pain(score) and time spent in physical activity(min) were calculated and compared among the 3 groups,adjusting for between-group differences in age.Results:There was a significant main effect of BMI on all outcome variables.Participants classified as Obese displayed significantly larger breasts,had greater thoracic flexion torques and reported less time participating in physical activity relative to the participants who were classified as Not Overweight and Overweight.Participants in the Obese group also displayed significantly more thoracic kyphosis and reported significantly more upper torso musculoskeletal pain compared to their counterparts who were classified as Not Overweight.Conclusion:This study is the first to demonstrate that increased obesity levels were associated with compromised kyphosis and loading of the thoracic spine,as well as increased symptoms of upper torso musculoskeletal pain and reduced time spent in physical activity in women living in the community.We recommend further research to determine whether evidence-based interventions designed to reduce the flexion torque generated on the thoracic spine can improve these symptoms of upper torso musculoskeletal pain and the ability of women with obesity to participate in physical activity.Purpose:This study investigated the effects of obesity on breast size,thoracic spine structure and function,upper torso musculoskeletal pain and physical activity participation in women living independently in the community.Methods:A total of 378 women were divided into 3 groups(Not Overweight:body mass index(BMI)=22.5±0.2 kg/m^2(mean±SE);Overweight:BMI=27.4±0.3 kg/m^2;Obese:BMI=35.4±0.3 kg/m^2).Outcome variables of breast volume(mL),thoracic flexion torque(N·m),thoracic kyphosis(degrees),upper torso musculoskeletal pain(score) and time spent in physical activity(min) were calculated and compared among the 3 groups,adjusting for between-group differences in age.Results:There was a significant main effect of BMI on all outcome variables.Participants classified as Obese displayed significantly larger breasts,had greater thoracic flexion torques and reported less time participating in physical activity relative to the participants who were classified as Not Overweight and Overweight.Participants in the Obese group also displayed significantly more thoracic kyphosis and reported significantly more upper torso musculoskeletal pain compared to their counterparts who were classified as Not Overweight.Conclusion:This study is the first to demonstrate that increased obesity levels were associated with compromised kyphosis and loading of the thoracic spine,as well as increased symptoms of upper torso musculoskeletal pain and reduced time spent in physical activity in women living in the community.We recommend further research to determine whether evidence-based interventions designed to reduce the flexion torque generated on the thoracic spine can improve these symptoms of upper torso musculoskeletal pain and the ability of women with obesity to participate in physical activity.

关 键 词：BREAST volume OBESITY THORACIC KYPHOSIS Upper TORSO loading 

分 类 号：R589.2[医药卫生—内分泌] G804.2[医药卫生—内科学]