Effects of Wearing a Backpack on Trunk-Lower Limb Kinematics at Start of Gait
[Purpose] The purpose of the present study was to analyze the effect of backpack heaviness on trunk-lower limb kinematics at the start of gait. [Subjects] Ten university male students (age=20.3 ± 0.98 years, height=1.69 ± 0.04 m, weight=59.5 ± 5.3 kg) participated in the present study. [Methods] Eac...
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| Veröffentlicht in: | Journal of Physical Therapy Science 2010, Vol.22(2), pp.149-154 |
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| creator | AL-Khabbaz, Yusuf S.S.M. Shimada, Tomoaki Hasegawa, Masashi Inoue, Yuriko |
| description | [Purpose] The purpose of the present study was to analyze the effect of backpack heaviness on trunk-lower limb kinematics at the start of gait. [Subjects] Ten university male students (age=20.3 ± 0.98 years, height=1.69 ± 0.04 m, weight=59.5 ± 5.3 kg) participated in the present study. [Methods] Each subject was asked to stand erect then walk forward in a straight line in four modes: unloaded, and with loads of 10%, 15%, and 20% body weight (BW). A VICON 250 motion analysis system was utilized to study changes in the trunk and lower limb kinematics at the start of gait. [Results] The results show significant trunk backward lean changes between the unloaded mode and loaded modes even with no changes in the center of mass (COM), velocity or displacement. [Conclusion] A 20%BW backpack caused the highest trunk kinematic changes, so backpack weight should be limited to 15%BW. It is also important to be aware of other factors correlated to backpack usage to provide better usage recommendations. |
| doi_str_mv | 10.1589/jpts.22.149 |
| format | Article |
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[Subjects] Ten university male students (age=20.3 ± 0.98 years, height=1.69 ± 0.04 m, weight=59.5 ± 5.3 kg) participated in the present study. [Methods] Each subject was asked to stand erect then walk forward in a straight line in four modes: unloaded, and with loads of 10%, 15%, and 20% body weight (BW). A VICON 250 motion analysis system was utilized to study changes in the trunk and lower limb kinematics at the start of gait. [Results] The results show significant trunk backward lean changes between the unloaded mode and loaded modes even with no changes in the center of mass (COM), velocity or displacement. [Conclusion] A 20%BW backpack caused the highest trunk kinematic changes, so backpack weight should be limited to 15%BW. It is also important to be aware of other factors correlated to backpack usage to provide better usage recommendations.</description><identifier>ISSN: 0915-5287</identifier><identifier>EISSN: 2187-5626</identifier><identifier>DOI: 10.1589/jpts.22.149</identifier><language>eng</language><publisher>The Society of Physical Therapy Science</publisher><subject>Backpack ; Centre of mass ; Trunk-lower limbs movement</subject><ispartof>Journal of Physical Therapy Science, 2010, Vol.22(2), pp.149-154</ispartof><rights>2010 by the Society of Physical Therapy Science</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c614t-1ac1e711a48ca0038139498784f28718dae144dd69c9c823daa3d04953db86583</citedby><cites>FETCH-LOGICAL-c614t-1ac1e711a48ca0038139498784f28718dae144dd69c9c823daa3d04953db86583</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,777,781,1877,4010,27904,27905,27906</link.rule.ids></links><search><creatorcontrib>AL-Khabbaz, Yusuf S.S.M.</creatorcontrib><creatorcontrib>Shimada, Tomoaki</creatorcontrib><creatorcontrib>Hasegawa, Masashi</creatorcontrib><creatorcontrib>Inoue, Yuriko</creatorcontrib><creatorcontrib>The Department of Physical Therapy</creatorcontrib><creatorcontrib>The Department of Occupational Therapy</creatorcontrib><creatorcontrib>Faculty of Health Science</creatorcontrib><creatorcontrib>Kansai Sougou Rehabilitation Colleague</creatorcontrib><creatorcontrib>Kobe University</creatorcontrib><title>Effects of Wearing a Backpack on Trunk-Lower Limb Kinematics at Start of Gait</title><title>Journal of Physical Therapy Science</title><addtitle>Journal of Physical Therapy Science</addtitle><description>[Purpose] The purpose of the present study was to analyze the effect of backpack heaviness on trunk-lower limb kinematics at the start of gait. [Subjects] Ten university male students (age=20.3 ± 0.98 years, height=1.69 ± 0.04 m, weight=59.5 ± 5.3 kg) participated in the present study. [Methods] Each subject was asked to stand erect then walk forward in a straight line in four modes: unloaded, and with loads of 10%, 15%, and 20% body weight (BW). A VICON 250 motion analysis system was utilized to study changes in the trunk and lower limb kinematics at the start of gait. [Results] The results show significant trunk backward lean changes between the unloaded mode and loaded modes even with no changes in the center of mass (COM), velocity or displacement. [Conclusion] A 20%BW backpack caused the highest trunk kinematic changes, so backpack weight should be limited to 15%BW. It is also important to be aware of other factors correlated to backpack usage to provide better usage recommendations.</description><subject>Backpack</subject><subject>Centre of mass</subject><subject>Trunk-lower limbs movement</subject><issn>0915-5287</issn><issn>2187-5626</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNo9kMtO5DAQRS3ESDQMq_kB71igNC7HSewdD0GD6NEspkeztKodBxzyaGy3EH-PowALVy18762qQ8gvYEsopLpodzEsOV-CUAdkwUFWWVHy8pAsmIIiK7isjshxCC1jvGJCLsjv26axJgY6NvS_Re-GJ4r0Gs3LLj06DnTj98NLth7frKdr12_poxtsj9GZQDHSvxF9nNwrdPEn-dFgF-zpZz8h_-5uNzf32frP6uHmap2ZEkTMAA3YCgCFNMhYLiFXQslKiiZtCLJGC0LUdamMMpLnNWJeM6GKvN7KspD5CTmbc3d-fN3bEHXvgrFdh4Md90HLquSiqKpJeT4rjR9D8LbRO-969O8amJ6Y6YmZ5lwnZkm9mtW9rZ3Bbhy6dKxux70f0j3aoGxnPUv2BJEznprSLLlTKQQAKyGHlHQ5J7Uh4pP9nppgOdPZ76l8LpP968s8o9d2yD8AEhOLmA</recordid><startdate>2010</startdate><enddate>2010</enddate><creator>AL-Khabbaz, Yusuf S.S.M.</creator><creator>Shimada, Tomoaki</creator><creator>Hasegawa, Masashi</creator><creator>Inoue, Yuriko</creator><general>The Society of Physical Therapy Science</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TS</scope></search><sort><creationdate>2010</creationdate><title>Effects of Wearing a Backpack on Trunk-Lower Limb Kinematics at Start of Gait</title><author>AL-Khabbaz, Yusuf S.S.M. ; Shimada, Tomoaki ; Hasegawa, Masashi ; Inoue, Yuriko</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c614t-1ac1e711a48ca0038139498784f28718dae144dd69c9c823daa3d04953db86583</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Backpack</topic><topic>Centre of mass</topic><topic>Trunk-lower limbs movement</topic><toplevel>online_resources</toplevel><creatorcontrib>AL-Khabbaz, Yusuf S.S.M.</creatorcontrib><creatorcontrib>Shimada, Tomoaki</creatorcontrib><creatorcontrib>Hasegawa, Masashi</creatorcontrib><creatorcontrib>Inoue, Yuriko</creatorcontrib><creatorcontrib>The Department of Physical Therapy</creatorcontrib><creatorcontrib>The Department of Occupational Therapy</creatorcontrib><creatorcontrib>Faculty of Health Science</creatorcontrib><creatorcontrib>Kansai Sougou Rehabilitation Colleague</creatorcontrib><creatorcontrib>Kobe University</creatorcontrib><collection>CrossRef</collection><collection>Physical Education Index</collection><jtitle>Journal of Physical Therapy Science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>AL-Khabbaz, Yusuf S.S.M.</au><au>Shimada, Tomoaki</au><au>Hasegawa, Masashi</au><au>Inoue, Yuriko</au><aucorp>The Department of Physical Therapy</aucorp><aucorp>The Department of Occupational Therapy</aucorp><aucorp>Faculty of Health Science</aucorp><aucorp>Kansai Sougou Rehabilitation Colleague</aucorp><aucorp>Kobe University</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of Wearing a Backpack on Trunk-Lower Limb Kinematics at Start of Gait</atitle><jtitle>Journal of Physical Therapy Science</jtitle><addtitle>Journal of Physical Therapy Science</addtitle><date>2010</date><risdate>2010</risdate><volume>22</volume><issue>2</issue><spage>149</spage><epage>154</epage><pages>149-154</pages><issn>0915-5287</issn><eissn>2187-5626</eissn><abstract>[Purpose] The purpose of the present study was to analyze the effect of backpack heaviness on trunk-lower limb kinematics at the start of gait. [Subjects] Ten university male students (age=20.3 ± 0.98 years, height=1.69 ± 0.04 m, weight=59.5 ± 5.3 kg) participated in the present study. [Methods] Each subject was asked to stand erect then walk forward in a straight line in four modes: unloaded, and with loads of 10%, 15%, and 20% body weight (BW). A VICON 250 motion analysis system was utilized to study changes in the trunk and lower limb kinematics at the start of gait. [Results] The results show significant trunk backward lean changes between the unloaded mode and loaded modes even with no changes in the center of mass (COM), velocity or displacement. [Conclusion] A 20%BW backpack caused the highest trunk kinematic changes, so backpack weight should be limited to 15%BW. It is also important to be aware of other factors correlated to backpack usage to provide better usage recommendations.</abstract><pub>The Society of Physical Therapy Science</pub><doi>10.1589/jpts.22.149</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| source | J-STAGE Free; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Backpack Centre of mass Trunk-lower limbs movement |
| title | Effects of Wearing a Backpack on Trunk-Lower Limb Kinematics at Start of Gait |
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