Document Detail

Changes in posture and perceived exertion in adolescents wearing backpacks with and without abdominal supports.
MedLine Citation:
PMID:  16715020     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: The goal was to examine whether backpacks with an abdominal support device improve posture and decrease exertion while walking among adolescents. DESIGN: Double-blinded trial, with 20 subjects, performed at a University Spine Center. On day 1, adolescents walked on a treadmill for 5 mins with photographic measurement of posture and responded to the Borg scale of perceived exertion before and after ambulation. On day 2, they repeated the trial four more times wearing a backpack randomly loaded with either 10% or 20% of body weight and with or without the Back Balancer abdominal support. Postural measures were recorded by a blinded observer. RESULTS: Postural changes (forward lean) wearing a backpack with abdominal support were significantly lower while carrying both 10% and 20% of body weight (P = 0.024 and P = 0.008, respectively) vs. no abdominal support. In addition, perceived exertion at 10% and 20% of body weight was significantly greater without abdominal support (P = 0.042 and P = 0.018, respectively). CONCLUSIONS: Forward lean and perceived exertion while wearing backpacks in adolescents can be significantly decreased with abdominal support. This may increase comfort and decrease complications, such as back pain, that may arise from backpack use.
Andrew B Marsh; Lisa DiPonio; Karen Yamakawa; Seema Khurana; Andrew J Haig
Publication Detail:
Type:  Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  American journal of physical medicine & rehabilitation / Association of Academic Physiatrists     Volume:  85     ISSN:  0894-9115     ISO Abbreviation:  Am J Phys Med Rehabil     Publication Date:  2006 Jun 
Date Detail:
Created Date:  2006-05-22     Completed Date:  2006-06-22     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8803677     Medline TA:  Am J Phys Med Rehabil     Country:  United States    
Other Details:
Languages:  eng     Pagination:  509-15     Citation Subset:  AIM; IM    
Physical Medicine and Rehabilitation, Spine Program, The University of Michigan, 325 East Eisenhower Parkway, Ann Arbor, MI 48108, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Back / physiology*
Orthotic Devices*
Physical Exertion / physiology*
Posture / physiology*
Protective Devices*
Walking / physiology
Weight Perception / physiology*
Weight-Bearing / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Reliability of a new instrument for measuring maximum rising strength.
Next Document:  Effect of manual lymph drainage on the course of serum levels of muscle enzymes after treadmill exer...