title: Inclined Weight-Loaded Walking at Different Speeds: Pelvis-Shoulder Coordination, Trunk Movements and Cost of Transport.
abstract: Although studied at level surface, the trunk kinematics and pelvis-shoulder coordination of incline walking are unknown. The aim of this study was to evaluate the speed effects on pelvis-shoulder coordination and trunk movement and the cost of transport (C) during unloaded and loaded (25% of body mass) 15% incline walking. We collected 3-dimensional kinematic and oxygen consumption data from 10 physically active young men. The movements were analyzed in the sagittal plane (inclination and range of trunk motion) and the transverse plane (range of shoulder and pelvic girdle motion and phase difference). The rotational amplitude of the shoulder girdle decreased with load at all speeds, and it was lower at the highest speeds. The rotational amplitude of the pelvic girdle did not change with the different speeds. The phase difference was greater at optimal speed (3 km.hr-1, at the lowest C) in the loaded and the unloaded conditions. The trunk inclination was greater with load and increased with speed, whereas the range of trunk motion was lower in the loaded condition and decreased with increasing speed. In conclusion, the load decreased the range of girdles and trunk motion, and the pelvis-shoulder coordination seemed to be critical for the incline walking performance.
authors.affiliation: a Exercise Research Laboratory , Escola de Educação Física, Fisioterapia e Dança, Universidade Federal do Rio Grande do Sul , Porto Alegre , Brazil.
authors.forename: Rodrigo Gomes da
authors.initials: RGD
authors.lastname: Rosa
authors.affiliation: a Exercise Research Laboratory , Escola de Educação Física, Fisioterapia e Dança, Universidade Federal do Rio Grande do Sul , Porto Alegre , Brazil.
authors.forename: Natalia Andrea
authors.initials: NA
authors.lastname: Gomeñuka
authors.affiliation: a Exercise Research Laboratory , Escola de Educação Física, Fisioterapia e Dança, Universidade Federal do Rio Grande do Sul , Porto Alegre , Brazil.
authors.forename: Henrique Bianchi de
authors.initials: HB
authors.lastname: Oliveira
authors.affiliation: a Exercise Research Laboratory , Escola de Educação Física, Fisioterapia e Dança, Universidade Federal do Rio Grande do Sul , Porto Alegre , Brazil.
authors.forename: Leonardo Alexandre
authors.initials: LA
authors.lastname: Peyré-Tartaruga
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena / Q000502:physiology; D005684:Gait / Q000502:physiology; D006801:Humans; D008297:Male; D009068:Movement / Q000502:physiology; D010388:Pelvis / Q000502:physiology*; D016059:Range of Motion, Articular / Q000502:physiology; D012782:Shoulder / Q000502:physiology*; D060726:Torso / Q000502:physiology*; D016138:Walking / Q000502:physiology*; D000072797:Walking Speed / Q000502:physiology*; D016474:Weight-Bearing / Q000502:physiology*; D055815:Young Adult
keywords: backpack; metabolic cost of incline walking; phase difference; slope; trunk coordination