1. Higher body mass index and body fat percentage correlate to lower joint and functional strength in working age adults
- Author
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Nicholas J. La Delfa, Brittany D. Bulbrook, Carmen Liang, Jack P. Callaghan, Clark R. Dickerson, and Alison C. McDonald
- Subjects
Adult ,Male ,Functional training ,Physical Therapy, Sports Therapy and Rehabilitation ,Human Factors and Ergonomics ,Isometric exercise ,Body fat percentage ,Body Mass Index ,03 medical and health sciences ,0302 clinical medicine ,medicine ,Prevalence ,Humans ,0501 psychology and cognitive sciences ,Obesity ,Working age ,Safety, Risk, Reliability and Quality ,Engineering (miscellaneous) ,Joint (geology) ,050107 human factors ,Low back ,business.industry ,05 social sciences ,medicine.disease ,030210 environmental & occupational health ,Cross-Sectional Studies ,Adipose Tissue ,Body Composition ,Female ,business ,Body mass index ,Demography - Abstract
As the prevalence of obesity grows worldwide, it becomes an increasing concern in working populations. Ergonomists are faced with the challenge of accommodating workplace layouts to include this worker demographic. This study investigated the relationship between shoulder and low back isometric joint strengths across body mass index (BMI) groups. Additionally, relationships between body fat percentage (BF%), absolute strength, and strength normalized to body mass were examined. Ninety, healthy, working age participants performed 11 functional and isometric joint strength exertions. BMI group influenced normalized strength, as the obese 2+ (BMI >35.0) group had up to 63.1% lower joint strength than all other BMI groups (p < 0.05). Significant strong to moderate negative linear relationships existed between BF% and normalized strength for both males and females, and relationships were stronger for females. These strength deficits highlight the importance of considering body composition during ergonomics analyses and configuration of occupational tasks.
- Published
- 2021