Optimal postural control is an essential capacity in daily life and can be highly variable. The purpose of this study was to investigate if young people have the ability to choose the optimal postural control strategy according to the postural condition and to investigate if non-specific low back pain (NSLBP) influences the variability in proprioceptive postural control strategies. Young individuals with NSLBP (n = 106) and healthy controls (n = 50) were tested on a force plate in different postural conditions (i.e., sitting, stable support standing and unstable support standing). The role of proprioception in postural control was directly examined by means of muscle vibration on triceps surae and lumbar multifidus muscles. Root mean square and mean displacements of the center of pressure were recorded during the different trials. To appraise the proprioceptive postural control strategy, the relative proprioceptive weighting (RPW, ratio of ankle muscles proprioceptive inputs vs. back muscles proprioceptive inputs) was calculated. Postural robustness was significantly less in individuals with NSLBP during the more complex postural conditions (p < 0.05). Significantly higher RPW values were observed in the NSLBP group in all postural conditions (p < 0.05), suggesting less ability to rely on back muscle proprioceptive inputs for postural control. Therefore, healthy controls seem to have the ability to choose a more optimal postural control strategy according to the postural condition. In contrast, young people with NSLBP showed a reduced capacity to switch to a more multi-segmental postural control strategy during complex postural conditions, which leads to decreased postural robustness.

Decreased variability in postural control strategies in young people with non-specific low back pain is associated with altered proprioceptive reweighting

https://research.vu.nl/ws/files/42732503/Tong_ArcHPhysMedRehabil_2017.pdf

Is There a Relationship Between Lumbar Proprioception and Low Back Pain? A Systematic Review With Meta-Analysis.

https://lirias.kuleuven.be/bitstream/123456789/297646/1/Neutral+sitting+paper+Final+PDF.pdf

Neutral lumbar spine sitting posture in pain-free subjects

Background: Smartphone use has greatly increased in recent days, and most of the daily tasks are done through these devices. As a result, long time use may involve bad posture that may result in musculoskeletal pain. Therefore, it is important to evaluate the association between addiction/overuse of smartphones and musculoskeletal pain. Aim: To determine the prevalence of addictive/overuse of smartphones among medical students and to investigate if there is an association between smartphone addiction and musculoskeletal pain. Method: A cross-sectional study conducted at Qassim University, medical college. The Smartphone Addiction Scale Short Version (SAS-SV) was used to measure the level of smartphone addiction while the Nordic musculoskeletal questionnaire (NMQ) was utilized to evaluate the musculoskeletal pain. Results: The prevalence of smartphone addiction among medical students was relatively high (60.3%). The most frequent pain related to smartphone addiction was in the neck (60.8%), followed by lower back (46.8%), shoulder (40.0%). The academic year level was statistically associated with the level of smartphone addiction. Moreover, we found a significant relationship between musculoskeletal pain and smartphone addiction at certain body regions, neck, wrist/hand and knees, Other musculoskeletal parameters included in the test were found to have no statistically significant association. Conclusion: More than half of the medical students identified as addicted to smartphones. The most common musculoskeletal pain was the neck, lower back, and shoulder. The academic year level found to have a significant association with the level of smartphone addiction while musculoskeletal pain such as neck, wrist, and knee were the independent significant factors of smartphone addiction; therefore, it is important to educate the community about the effect of being addicted to smartphone use in order to prevent the consequences of this behavior.

Evaluating the relationship between smartphone addiction/overuse and musculoskeletal pain among medical students at Qassim University.

[Purpose] The purpose of this study was to compare cervical repositioning errors according to smartphone addiction grades of adults in their 20s. [Subjects and Methods] A survey of smartphone addiction was conducted of 200 adults. Based on the survey results, 30 subjects were chosen to participate in this study, and they were divided into three groups of 10; a Normal Group, a Moderate Addiction Group, and a Severe Addiction Group. After attaching a C-ROM, we measured the cervical repositioning errors of flexion, extension, right lateral flexion and left lateral flexion. [Results] Significant differences in the cervical repositioning errors of flexion, extension, and right and left lateral flexion were found among the Normal Group, Moderate Addiction Group, and Severe Addiction Group. In particular, the Severe Addiction Group showed the largest errors. [Conclusion] The result indicates that as smartphone addiction becomes more severe, a person is more likely to show impaired proprioception, as well as impaired ability to recognize the right posture. Thus, musculoskeletal problems due to smartphone addiction should be resolved through social cognition and intervention, and physical therapeutic education and intervention to educate people about correct postures.

Katherine J. Dolan

Papers

Lumbar spine reposition sense: the effect of a 'slouched' posture.