Characteristics of lumbar flexion rhythm at different arm positions

Author(s):  
Fumin Pan ◽  
Rui Zhu ◽  
Chao Kong ◽  
Weiguo Zhu ◽  
Shibao Lu ◽  
...  
Keyword(s):  
2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Vahideh Moradi ◽  
Amir-Hossein Memari ◽  
Monir ShayestehFar ◽  
Ramin Kordi

We aimed to examine systematically the available evidence on risk factors of low back pain (LBP) in athletes. We performed search without language restriction in PubMed, Ovid, Google Scholar, Scopus, and CINAHL. Longitudinal studies that examined possible risk factors of LBP in athletes were included in this systematic review. Based on methodological quality of studies, a best-evidence synthesis was conducted. Seven longitudinal studies were included, four of which had high methodological quality. Results showed that previous LBP, decreased lumbar flexion, and decreased lumbar extension are positively associated with LBP. There was moderate evidence for hip flexor tightness and high body weight as a risk factor. We found insufficient evidence for association between forward bending, previous injury, and amount of training per week, active years, age, and sex with LBP. In conclusion this study would provide a list of risk factors for LBP in athletes, though it showed a strong evidence for only a few including decrease lumbar flexion or extension, previous LBP, and high body weight. This review indicated a high heterogeneity of study characteristics including assessed risk factors and statistical techniques might limit the quality of evidence.


2008 ◽  
Vol 23 (7) ◽  
pp. 870-880 ◽  
Author(s):  
Jimmy Youssef ◽  
Bradley Davidson ◽  
Bing He Zhou ◽  
Yun Lu ◽  
Vikas Patel ◽  
...  
Keyword(s):  

2015 ◽  
Vol 67 (4) ◽  
pp. 538-545 ◽  
Author(s):  
Carmen Stolwijk ◽  
Sofia Ramiro ◽  
Debby Vosse ◽  
Robert Landewé ◽  
Désirée van der Heijde ◽  
...  

2017 ◽  
Vol 8 (2) ◽  
pp. 228
Author(s):  
Luis Ceballos-Laita ◽  
Teresa Mingo-Gómez ◽  
Sandra García-Lázaro ◽  
Sandra Jiménez-del Barrio

Resumen: Introducción: La información sobre la correcta ergonomía se ha incrementado para disminuir la prevalencia de síntomas lumbares y/o cervicales en la población. Sin embargo, el acondicionamiento y el mobiliario de las instituciones universitarias no se adecuan a las características individuales de los sujetos, lo cual dificulta el proceso. Objetivo: analizar los cambios en la postura, al incorporar un apoyo isquiático en sujetos jóvenes. Material: Estudio transversal comparativo sobre 76 sujetos universitarios voluntarios (24 varones y 52 mujeres, edad media de 20,7; DT ± 2,64). Se registró la postura mediante fotogrametría sagital con un software 2D, en posición de sedestación y en sedestación corregida mediante la colocación de un apoyo isquiático de 5 centímetros de altura. Posteriormente se analizaron los ángulos cráneo-vertebral (CV), cervical superior (CS), cervical inferior (CI), lumbar (AL). Resultados: Se encontraron diferencias estadísticamente significativas entre la posición sedente y la sedente corregida en todos los ángulos analizados (p<0,01). Consiguiendo la disminución de la flexión lumbar y de la posición de cabeza adelantada. Conclusión: La utilización de un apoyo isquiático de 5 centímetros de altura en la posición de sedestación, disminuye la flexión lumbar y la posición de cabeza adelantada en comparación con una sedestación sin apoyo en sujetos jóvenes.Palabras clave: postura, columna, comunicación, ingeniería humana, educación para la salud.Abstract: Introduction: Information about correct ergonomics is increasing in order to avoid cervical and lumbar symptoms. However, the furniture of the colleges does not fit the individual characteristics, which make difficult the process. Objective: Analyse the posture change, when an ischial support is incorporated in young population. Methods: Cross sectional study. 76 volunteers students were included (24 men and 53 women, average age 20,7 SD ± 2,64). Posture was registered with sagittal photogrammetry and analysed by 2D software, in sitting position and corrected sitting position by 5-centimeters-isquial-support. Then, Neck Slope angle (NS), Upper Cervical angle (UP) Lower cervical angle (LC) and lumbar spine angle (LS) were analysed. Results: Statistical differences were found between the sitting position and corrected sitting position in all analysed angles (p<0,01). This means less lumbar flexion and forward head position. Conclusion: A 5-centimeter-isquial-support decrease lumbar flexion and forward head position compared to sitting position without ischial support in young adults.Keywords: posture, spine, communication, human engineering, health education.


2021 ◽  
Author(s):  
Marzyeh Ramezani ◽  
Amin Kordi Yoosefinejad ◽  
Alireza Motealleh ◽  
Mohsen Ghofrani-Jahromi

Abstract Background: Trunk flexion is a common exercise during daily activities. Flexion relaxation phenomenon (FRP) occurs during forward bending in which there is a sudden silence of erector spinae (ES) muscles. The pattern of forward bending differs in yoga practitioners. This learned pattern probably predisposes yogis to injuries.The hypothesis of this study was that FRP differs in yogis in comparison to non-yogis individuals.Methods: This observational cross-sectional study was performed on 60 women assigned into yogis and non-athlete groups. Each participant was asked to bend forward and then return to the initial position. ES activity was recorded at L3 level, 4 cm from mid line during the trial. Trunk inclination and lumbar flexion angles were calculated at FRP onset and cessation moments. Results: The FRP phenomenon occurred in 80% of yoga practitioners in comparison to 96.7% in the control group. Trunk inclination angle was significantly greater at FRP initiation in yogis compared to control group. Lumbar flexion angle was not different between the groups. Conclusions: It is concluded that the altered pattern of forward bending observed in yogis may change patterns of ES muscles activity if it becomes part of a person's daily lifestyle which might predispose these muscles to fatigue and subsequent injuries.


Spine ◽  
2000 ◽  
Vol 25 (22) ◽  
pp. 2916-2924 ◽  
Author(s):  
Mathew Williams ◽  
Moshe Solomonow ◽  
Bing He Zhou ◽  
Richard V. Baratta ◽  
Mitchel Harris
Keyword(s):  

1993 ◽  
Vol 73 (1) ◽  
pp. 26-37 ◽  
Author(s):  
Renee Williams ◽  
Jill Binkley ◽  
Ralph Bloch ◽  
Charles H Goldsmith ◽  
Terry Minuk

2013 ◽  
Vol 72 (Suppl 3) ◽  
pp. A521.1-A521
Author(s):  
C. Stolwijk ◽  
S. Ramiro ◽  
R. Landewé ◽  
D. van der Heijde ◽  
A. van Tubergen

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