Effects of external loading on lumbar extension moment during squat lifting

Vahdat, Iman; Rostami, Mostafa; Ghomsheh, Farhad Tabatabai; Khorramymehr, Siamak; Tanbakoosaz, Ali

doi:10.13075/ijomeh.1896.00896

Cited by 4 publications

(6 citation statements)

References 32 publications

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“…Injuries to the lower back often arise in weightlifting due to improper execution of exercises and using excessive weights, and as a result, low back pain (LBP) is considered one of the most common complaints in the sport [4]. Adolescents and young adults are particularly vulnerable to this type of injury due to growth spurts, increased physical activity and increased engagement in sports [5].…”

Section: Introductionmentioning

confidence: 99%

Low Back Pain Among Weightlifting Adolescents and Young Adults

Fares

Salhab

et al. 2020

Cureus

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Background Weightlifting is a common type of sports training that develops the strength and size of skeletal muscles. Low back pain (LBP) is one of its most common complaints. This sport has become prevalent among adolescents and young adults as they work to enhance their physique and body image. The aim of our study is to explore the nature and cause of LBP in weightlifting adolescents and young adults in an aim of extrapolating proper preventive measures.

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Section: Introductionmentioning

confidence: 99%

Low Back Pain Among Weightlifting Adolescents and Young Adults

Fares

Salhab

et al. 2020

Cureus

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“…The high levels of an inertial force of the lifted box can cause jerky contraction of the muscles and consequently increase the risk of lumbar spine injury [27,45]. Back compression forces peak toward the beginning of a lift [46].…”

Section: Resultsmentioning

confidence: 99%

“…All the participants recorded increasing velocity twice for the LS binning process, namely before and after crouching. Thus, the HS binning process could be a potential under-recognized risk factor for WMSDs, as it is a task that entails complex biomechanical activity due to the higher maximum velocities recorded at different phases of the process rather than the walking phase [46,47].…”

Section: Resultsmentioning

confidence: 99%

Ergonomics Risk Assessment for Manual Material Handling of Warehouse Activities Involving High Shelf and Low Shelf Binning Processes: Application of Marker-Based Motion Capture

et al. 2022

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Lower back pain is a musculoskeletal disorder that is commonly reported among warehouse workers due to the nature of the work environment and manual handling activities. The objective of this study was to assess the ergonomic risks among warehouse workers carrying out high shelf (HS) and low shelf (LS) binning processes. A questionnaire was used to determine the prevalence of musculoskeletal symptoms, while a marker-based motion capture (MoCap) system worksheet was used to record the participants’ motion and determine the action risk level. A total of 33% of the participants reported lower back pain in the past seven days, based on the Cornell Musculoskeletal Discomfort Questionnaire (CMDQ) results. Analysis of the body velocities showed that the HS binning process had four major velocity peaks, defined as the initial, lowering, lifting, and final phases. In comparison, the LS binning process had two major peaks defined, the crouching and rising phases. There were significant differences between the mean velocities of the workers for the HS binning process, indicating that the workers have different movement patterns with varying velocities.

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“…We divided the time series of trunk movement into flexion and extension phases, and we calculated the trunk coordination pattern of each phase (Fig. 2 ) [ 31 ]. The flexion phase began with the start of trunk flexion motion and ended when the box was raised.…”

Section: Methodsmentioning

confidence: 99%

Task-specific fear influences abnormal trunk motor coordination in workers with chronic low back pain: a relative phase angle analysis of object-lifting

Fujii

Imai

Shigetoh

et al. 2022

BMC Musculoskelet Disord

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Background Pain-related fear influences impaired trunk movement (e.g., limited movement of range and velocity), but it is unclear how fear relates to trunk motor coordination (e.g., a more “in-phase” upper-lower trunk motion pattern). We conducted the present study to: (1) identify the motor coordination pattern of the in-phase upper-lower lumbar movements during the lifting, and (2) determine how pain-related fear is related to the trunk coordination pattern in workers with chronic low back pain (CLBP). Methods We examined 31 male workers with CLBP (CLBP group) and 20 healthy controls with no history of CLBP (HC group). The movement task was lifting a box, the weight of which was 10, 30%, or 50% of the subject’s body weight. We used a 3D motion capture system to calculate the mean absolute relative phase angle (MARP) angle as an index of coordination and the mean deviation phase (DP) as an index of variability. We used a numerical rating scale to assess the subjects’ task-specific fear. Results The MARP angle during trunk extension movement in the 50% condition was significantly decreased in the CLBP group compared to the HCs; i.e., the upper lumbar movement was more in-phase with the lower lumbar movement. The hierarchical multiple regression analysis results demonstrated that a decreased MARP angle was associated with high task-specific fear. Conclusions A more ‘in-phase’ upper-lower lumbar movement pattern was predicted by task-specific fear evoked when performing a work-related activity. Our findings suggest that an intervention for task-specific fear may be necessary to improve an individual’s impaired trunk motor coordination.

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Effects of external loading on lumbar extension moment during squat lifting

Cited by 4 publications

References 32 publications

Low Back Pain Among Weightlifting Adolescents and Young Adults

Low Back Pain Among Weightlifting Adolescents and Young Adults

Ergonomics Risk Assessment for Manual Material Handling of Warehouse Activities Involving High Shelf and Low Shelf Binning Processes: Application of Marker-Based Motion Capture

Task-specific fear influences abnormal trunk motor coordination in workers with chronic low back pain: a relative phase angle analysis of object-lifting

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