Immediate responses to backpack carriage on postural angles in young adults: A crossover randomized self-controlled study with repeated measures
| Autor: | Bianca O. Ugwuele, Elochukwu Fortune Ezenwankwo, Pascal C. Uzoh, Ifunanya Ani, Kinsley Amarachineke, Collins Atuma, Ukachukwu Okoroafor Abaraogu, Geoffrey C. Nwafor, Obed Ewelunta, Ijeoma Blessing Nwadilibe |
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| Rok vydání: | 2017 |
| Předmět: |
Male
030506 rehabilitation medicine.medical_specialty Posture medicine.disease_cause Weight-bearing law.invention Weight-Bearing 03 medical and health sciences Young Adult 0302 clinical medicine Randomized controlled trial law Medicine Humans Cross-Over Studies business.industry Rehabilitation Public Health Environmental and Occupational Health Repeated measures design Crossover study Trunk Sagittal plane Backpack Biomechanical Phenomena medicine.anatomical_structure Physical therapy Female Analysis of variance 0305 other medical science business 030217 neurology & neurosurgery Neck |
| Zdroj: | Work (Reading, Mass.). 57(1) |
| ISSN: | 1875-9270 |
| Popis: | Background Heavy backpacks have been associated with various postural changes and consequently musculoskeletal disorders. Objective We evaluated the immediate responses of varying backpack loads on cranio-vertebral angle (CVA), sagittal shoulder angle (SSA) and trunk forward lean (TFL) of young adults between the ages of 18-25 years. Methods This was a 3×3 cross over randomized controlled study with repeated measures among a convenience sample of young adults (n = 30; 50% male, 50% female). Each participant in a standing posture was assessed at four different loads: no backpack, carrying backpack of 5%, 10%, and 15% of body weight (BW). A sagittal photograph was taken of the area of the body corresponding to spinal angle during each of these test conditions to allow for later analysis of postural deviations. Comparisons of the mean deviations of the different postural angles from baseline and between test conditions were made using ANOVA at p≤0.05. Results Generally, there was a trend toward a decrease in the CVA and TFL with increasing backpack loads. Specifically, a significant decrease was seen for TFL at10% and 15% BW loads when compared with no load condition. In contrast, the decrease in CVA was only significant between no load condition and 15% body weight load. The SSA remained unchanged with backpack weight within 15% BW. Conclusion Whereas the SSA of young adults may not be upset by an acute loading with a backpack within 15% of body weight, a 15% BW backpack led to more forward posture of the head on the neck. In addition, backpack load as low as 10% BW is enough to cause an immediate forward lean of the trunk. |
| Databáze: | OpenAIRE |
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