Musculoskeletal Simulation of the Relationship Between Foot Position and Stress of the L4–l5 Joint in Supporting Standing-Up Motion to Prevent Low Back Pain Among Caregivers

Kitagawa, Kodai; Nishisako, Yoshiki; Nagasaki, Takayuki; Nakano, Satoshi; Wada, Chikamune

doi:10.1142/s0219519419400165

Cited by 10 publications

(26 citation statements)

References 13 publications

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“…It was observed that minimum rather than maximum flexion of the lumbar spine occurred at initial contact and that flexion increased early in the single-support phase of the gait cycle. Kitagawa et al 14 studied the link between foot position and load of the L4-L5 spinal segments as lower back load during supporting standing-up via musculoskeletal simulation in the group of caregivers. It was shown that as the anteroposterior distance and lateral widths between both feet increased, the average value of compression of the L4-L5 segments during movements decreased.…”

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confidence: 99%

Baropodometric evaluation of foot load distribution during gait in the group of professionally active nurses

Kołcz

Główka

Kowal

et al. 2019

Journal of Occupational Health

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Healthcare workers often declare poor knowledge and non-application of ergonomic principles. 1 The most common reasons are lack of knowledge related to the need to apply ergonomic principles at work, haste or carelessness. Nurses often work with lifting and carrying loads that exceed the body's adaptability. 2 It is likely that choosing more precise content related to traffic ergonomics and safe behavior during the Occupational Health and Safety (OSH) Training,

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confidence: 99%

Baropodometric evaluation of foot load distribution during gait in the group of professionally active nurses

Kołcz

Główka

Kowal

et al. 2019

Journal of Occupational Health

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“…These results suggested that foot-position #9 with the longest feet-distance may cause greater load on erector spinae muscles than other foot-position. According to our previous study 7 ) , foot-position #9 with the longest feet-distance could reduce stress of lumber vertebral, but these results suggested that this placement was not optimum for low load motion to prevent lower back pain because it caused load on the erector spinae muscles. Because there were many significantly different iEMG values in only the right spinae muscles, it is hypothesized the that foot-position affected the load of the right erector muscles in the rear lower limb that was involved.…”

Section: Discussionmentioning

confidence: 90%

“…These results show that foot-position #7 (anterior-posterior 55%, lateral-medial 20% of body height) could use lower limb muscles instead of the lower back without increasing loads on erector spinae muscle. In addition, foot-position #7 uses longer feet-distance which is effective in reducing lumbar vertebral stress 7 ) . Furthermore, longer anteroposterior feet-distance is effective for moving COG of patient in supporting standing-up 23 ) .…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, we focused on caregiver foot-position as an adjustable parameter since caregivers can adjust their own foot-positions before providing patient handling motion support. Our previous study found that when the foot-distance of the caregiver increased, stress on the lumbar vertebra decreased while providing standing-up support 7 ) . In addition, body mechanics theory 5 ) and a previous study related to manual handling 8 ) also suggested the possibility that greater foot-distance could reduce lower back load by prompting usage of lower limb muscles instead of lower back muscles.…”

Section: Introductionmentioning

confidence: 99%

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Optimal foot-position of caregiver based on muscle activity of lower back and lower limb while providing sit-to-stand support

et al. 2020

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[Purpose] In caregivers, low load posture is necessary to prevent lower back pain during patient handling activities such as sit-to-stand support. This study focused on the foot-position of caregivers as an adjustable and useful parameter. A wide stance decreases the stress on the lumbar vertebra. However, this foot-position increases loading of the spinae erector muscles. The aim of this study was to investigate the relationship of anterior-posterior and lateral-medial distances between feet and activity of the spinae erector muscles to determine the optimal foot-position for reducing stress on the lumbar vertebra without increasing spinae erector muscle load. [Participants and Methods] Five young male participants were asked to provide sit-to-stand support 10 times using nine normalized foot-positions with different anterior-posterior and lateral-medial distances. Surface electromyograms of the erector spinae and lower limb muscles were measured during sit-to-stand support. [Results] The results showed that the optimal foot-position (anterior-posterior 55%, lateral-medial 20% of body height) increased muscle activity within the lower limb muscles compared with the lower back muscles and did not increase loads on the erector spinae muscle. [Conclusion] Optimizing foot-position can reduce stress on the lumbar vertebra without increasing load on the spinae erector muscles.

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“…Previous studies have shown that surface EMG is useful for evaluating lumbar load11 ) . However, low back pain is associated with stress of the lumbar vertebra10, 12 ) and muscle cross-sectional areas13, 14 ) . We evaluated the patient handling motions to the doll to fix several factors.…”

Section: Discussionmentioning

confidence: 99%

Relationship between surface electromyography of the spinae erector muscles and subjectively adjusted step length in the supporting standing-up motion

et al. 2019

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[Purpose] Caregivers experience low back pain owing to frequent patient handling motions such as supporting the body while standing up. To prevent low back pain in caregivers, low load posture while engaging in patient handling motions is required. We determined the relationship between surface electromyography of the erector spinae muscles and subjective step length as “long” and “short” during the supporting standing-up motions of caregivers. [Participants and Methods] Ten young male participants were asked to perform supporting standing-up motion 10 times using two-step lengths comprised of subjective long and short steps. During supporting standing-up motion, we measured surface electromyograms of the erector spinae muscles and calculated the integral electromyographic values. [Results] The subjective long/short-step length normalized by body height did not differ across the participants. In addition, the subjective long-step length was longer than the subjective short-step length in all the participants. Integral electromyographic values for both the left and right erector spinae muscles in the short-step length were significantly lower than those in the long-step length when the data obtained from all the participants were used. [Conclusion] We considered that the load of the erector spinae muscle will be reduced if the short-step instead of the long-step instruction is given. In the future, instructions based on the subjective step-length variation in caregivers must be considered.

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Musculoskeletal Simulation of the Relationship Between Foot Position and Stress of the L4–l5 Joint in Supporting Standing-Up Motion to Prevent Low Back Pain Among Caregivers

Cited by 10 publications

References 13 publications

Baropodometric evaluation of foot load distribution during gait in the group of professionally active nurses

Baropodometric evaluation of foot load distribution during gait in the group of professionally active nurses

Optimal foot-position of caregiver based on muscle activity of lower back and lower limb while providing sit-to-stand support

Relationship between surface electromyography of the spinae erector muscles and subjectively adjusted step length in the supporting standing-up motion

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