{"id":34856,"date":"2013-02-01T00:00:00","date_gmt":"2018-12-03T23:35:45","guid":{"rendered":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/resume-scientifique\/obesity-does-not-impair-walking-economy-across-a-range-of-speeds\/"},"modified":"2018-12-04T00:35:45","modified_gmt":"2018-12-03T23:35:45","slug":"obesity-does-not-impair-walking-economy-across-a-range-of-speeds","status":"publish","type":"resume","link":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/resume-scientifique\/obesity-does-not-impair-walking-economy-across-a-range-of-speeds\/","title":{"rendered":"Obesity does not impair walking economy across a range of speeds and grades."},"content":{"rendered":"<p>Despite the popularity of walking as a form of physical activity for obese individuals, relatively little is known about how obesity affects the metabolic rate, economy and underlying mechanical energetics of walking across a range of speeds and grades. The purpose of this study was to quantify metabolic rate, stride kinematics and external mechanical work during level and gradient walking in obese and non-obese adults. Thirty-two obese (18 female, mass = 103.2 (15.8) kg, BMI = 35.0 (4.5) kg\u2022m(-2), mean (SD)) and 19 non-obese (10 female, mass = 64.9 (10.6) kg, BMI = 21.6 (2.0) kg\u2022m(-2)) volunteers participated in this study. We measured oxygen consumption, ground reaction forces and lower extremity kinematics while subjects walked on a dual-belt force-measuring treadmill at eleven speeds\/grades (0.50 &#8211; 1.75 m\u2022s(-1), -3\u00b0 to +9\u00b0). We calculated metabolic rate, stride kinematics and external work. Net metabolic rate (E(net\/kg), W\u2022kg(-1)) increased with speed or grade across all individuals. Surprisingly and in contrast with previous studies, E(net\/kg) was 0-6% less in obese compared to non-obese adults (p=0.013). External work, although a primary determinant of E(net\/kg), was not affected by obesity across the range of speeds\/grades used in this study. We also developed new prediction equations to estimate oxygen consumption and E(net\/kg) and found that E(net\/kg) was positively related to relative leg mass and step width and negatively related to double support duration. These results suggest that obesity does not impair walking economy across a range of walking speeds and grades.<\/p>\n","protected":false},"template":"","mots_cles":[],"class_list":["post-34856","resume","type-resume","status-publish","hentry"],"acf":{"adresse":"Colorado State University.","annee":"2013","mois":"2","numero":"","page":"","auteurs":[{"ID":34852,"post_author":"0","post_date":"2018-12-04 00:35:43","post_date_gmt":"2018-12-03 23:35:43","post_content":"","post_title":"Browning","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"browning","to_ping":"","pinged":"","post_modified":"2018-12-04 00:35:43","post_modified_gmt":"2018-12-03 23:35:43","post_content_filtered":"","post_parent":0,"guid":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/auteur\/browning\/","menu_order":0,"post_type":"auteur_resume","post_mime_type":"","comment_count":"0","filter":"raw"},{"ID":34853,"post_author":"0","post_date":"2018-12-04 00:35:44","post_date_gmt":"2018-12-03 23:35:44","post_content":"","post_title":"Reynolds","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"reynolds","to_ping":"","pinged":"","post_modified":"2018-12-04 00:35:44","post_modified_gmt":"2018-12-03 23:35:44","post_content_filtered":"","post_parent":0,"guid":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/auteur\/reynolds\/","menu_order":0,"post_type":"auteur_resume","post_mime_type":"","comment_count":"0","filter":"raw"},{"ID":34854,"post_author":"0","post_date":"2018-12-04 00:35:45","post_date_gmt":"2018-12-03 23:35:45","post_content":"","post_title":"Board","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"board","to_ping":"","pinged":"","post_modified":"2018-12-04 00:35:45","post_modified_gmt":"2018-12-03 23:35:45","post_content_filtered":"","post_parent":0,"guid":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/auteur\/board\/","menu_order":0,"post_type":"auteur_resume","post_mime_type":"","comment_count":"0","filter":"raw"}],"sources":[{"ID":34855,"post_author":"0","post_date":"2018-12-04 00:35:45","post_date_gmt":"2018-12-03 23:35:45","post_content":"","post_title":"J APPL PHYSIOL","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"j-appl-physiol","to_ping":"","pinged":"","post_modified":"2018-12-04 00:35:45","post_modified_gmt":"2018-12-03 23:35:45","post_content_filtered":"","post_parent":0,"guid":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/source\/j-appl-physiol\/","menu_order":0,"post_type":"source","post_mime_type":"","comment_count":"0","filter":"raw"}]},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.6 (Yoast SEO v23.6) - 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