title: The influence of trunk inclination on muscle activity during sitting on forward inclined seats.
abstract: The aim of the study was to estimate the influence of trunk inclination on muscle activity during sitting on forward inclined seats without backrest. The group consisting of thirteen healthy women was examined. Based on anthropometrical data two types of sitting position were adopted with two different angles between thighs and trunk: 120 and 135 degrees. Bioelectrical activity of five muscles was recorded. There was observed statistical influence of the trunk inclination on erector spinae, gastrocnemius lat. and tibialis anterior (p < 0.05). Especially, the inclination of seat pan influenced tibialis anterior activity (10%), although EMG measured during sitting did not exceed 20% of MVC.
authors.affiliation: Institute of Industrial Design, Warsaw, Poland. andrzej_mastalerz@iwp.com.pl
authors.forename: Andrzej
authors.initials: A
authors.lastname: Mastalerz
authors.forename: Iwona
authors.initials: I
authors.lastname: Palczewska
mesh_terms: D001696:Biomechanical Phenomena / Q000502:physiology; D004576:Electromyography; D005260:Female; D006801:Humans; D018482:Muscle, Skeletal / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D055815:Young Adult