title: The Influence of the "Straighten Your Back" Command on the Sagittal Spinal Curvatures in Children with Generalized Joint Hypermobility.
abstract: Objectives. The aim of the study was to assess the change of sagittal spinal curvatures in children with generalized joint hypermobility (GJH) instructed with "straighten your back" command (SYB).Methods. The study included 56 children with GJH. The control group consisted of 193 children. Sacral slope (SS), lumbar lordosis (LL), global thoracic kyphosis (TK), lower thoracic kyphosis (LK), and upper thoracic kyphosis (UK) were assessed with Saunders inclinometer both in spontaneous positions (standing and sitting) and after the SYB.Results. Children with GJH after SYB presented the following: in standing, increase in SS and decrease in TK, LK, and UK (P< 0.01), with LL not significantly changed; in sitting: decrease in global thoracic kyphosis (35.5° (SD 20.5) versus 21.0° (SD 15.5),P< 0.001) below the standards proposed in the literature (30-40°) and flattening of its lower part (P< 0.001). The same changes were observed in the control group.Conclusions. In children with generalized joint hypermobility, the "straighten your back" command leads to excessive reduction of the global thoracic kyphosis and flattening of its lower part. Therefore, the "straighten your back" command should not be used to achieve the optimal standing and sitting positions.
authors.affiliation: Department of Physiotherapy, Józef Rusiecki University College, Bydgoska 33, 10-243 Olsztyn, Poland.
authors.forename: Dariusz
authors.identifier: 0000-0002-8993-4322
authors.initials: D
authors.lastname: Czaprowski
authors.affiliation: Department of Physiotherapy, Józef Rusiecki University College, Bydgoska 33, 10-243 Olsztyn, Poland.
authors.forename: Paulina
authors.initials: P
authors.lastname: Pawłowska
authors.affiliation: Department of Physiotherapy, Józef Rusiecki University College, Bydgoska 33, 10-243 Olsztyn, Poland.
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Kolwicz-Gańko
authors.affiliation: Department of Physiotherapy, Józef Rusiecki University College, Bydgoska 33, 10-243 Olsztyn, Poland.
authors.forename: Dominik
authors.initials: D
authors.lastname: Sitarski
authors.affiliation: Department of Posture Correction and Compensation, Faculty of Physical Education and Sport in Biala Podlaska, Józef Piłsudski University of Physical Education in Warsaw, Akademicka 2, 21-500 Biala Podlaska, Poland.
authors.forename: Agnieszka
authors.identifier: 0000-0002-8128-4839
authors.initials: A
authors.lastname: Kędra
mesh_terms: D000293:Adolescent; D002648:Child; D003463:Cues; D005260:Female; D006801:Humans; D007593:Joint Instability / Q000534:rehabilitation*; D007738:Kyphosis; D007858:Learning; D008141:Lordosis; D008159:Lumbar Vertebrae; D008297:Male; D004856:Postural Balance; D011187:Posture; D012600:Scoliosis / Q000534:rehabilitation*; D013121:Spinal Curvatures / Q000534:rehabilitation*; D013904:Thoracic Vertebrae