Influence of static lumbar flexion on the trunk muscles' response to sudden arm movements

Lehman, Gregory J; Story, Stephen B.; Mabee, Robert

doi:10.1186/1746-1340-13-23

Cited by 11 publications

(3 citation statements)

References 20 publications

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“…Numerous studies have been conducted on the use of this tool to measure muscle activity by EMG [6,[11][12][13]. According to Lehman et al, who recorded muscle activity using EMG, the use of a Swiss ball in the front plank increased the activity of the rectus abdominis and external oblique muscles; however, it did not affect the internal oblique and erector spinae muscles [18]. The current research findings are in line with their results regarding the internal oblique muscle.…”

Section: Discussionsupporting

confidence: 86%

Ultrasonographic Comparison of Deep Lumbopelvic Muscles Activity in Plank Movements on Stable and Unstable Surface

Mirmohammad

Minoonejhad

Sheikhhoseini

2019

PTJ

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The body core facilitates the transition of forces and moments between the upper and lower extremities in every movement. The present study investigated the differences in the sonographic activity of the deep lumbopelvic muscles during the implementation of plank movements on stable and unstable surfaces. Methods: In total, 16 female athletes with the Mean±SD age of 23.69±3.57 years, Mean±SD height of 165.12±4.93 cm, and Mean±SD weight of 56.88±5.34 kg participated in this controlled laboratory study. Before the study onset, the Madison Model X8 ultrasound (Made in Korea) with Surface Linear Probe with the frequencies of 7.5 to 10.5 MHz was used to measure the thickness of the internal and external abdominal muscles, quadratus lumborum, and multifidus muscles. Moreover, their thickness was measured while performing front and side plank exercises on stable and unstable surfaces. The Paired Samples t-test was used for data analysis considering α=0.05. Results: There were no statistically significant differences in the mean diameter changes of the internal and external oblique, quadratus lumborum, and multifidus muscles in the front and side plank positions between the stable and unstable surfaces (P>0.05). Conclusion: Probably, the shift from stable to unstable position (using Swiss ball) does not change the level of deep core muscles' activity in female athletes. Furthermore, exercising at each stable and unstable position may have no additional effects on these muscles.

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Section: Discussionsupporting

confidence: 86%

Ultrasonographic Comparison of Deep Lumbopelvic Muscles Activity in Plank Movements on Stable and Unstable Surface

Mirmohammad

Minoonejhad

Sheikhhoseini

2019

PTJ

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“…These findings are supported by the results of other experiments. Many authors noted that the mechanism of motor control of the deep abdominal muscles is based on random muscle activation in both normal and painful conditions [32][33][34]. This might suggest that 'plasticity' constitutes a characteristic feature of the pattern of deep abdominal muscle activation, and it often depends on the character of the given motor task (e.g.…”

Section: Discussionmentioning

confidence: 99%

Deformations of abdominal muscles under experimentally induced low back pain

et al. 2019

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Purpose Low back pain (LBP) is associated with altered motor control and muscle activity; however, it remains unknown whether these changes predispose humans to injury and pain or are the consequence of ongoing nociceptive processes. In this experimental study, we aimed to use a novel ultrasound imaging technique for the measurement of lateral abdominal wall muscle activity: the tissue deformation index (TDI). Methods Forty-two healthy subjects (22.30 ± 1.49 years of age) were exposed to postural perturbation induced by rapid arm movement. Activity of three muscles, the transversus abdominis (TrA) and the internal and external oblique (EO), was recorded by ultrasound imaging (M-mode) with and without induction of LBP. Pain was induced by electrical stimulation applied bilaterally to the lumbar spine.Results No significant differences in the TDI between right and left sides of the body (p > 0.05) were found. Generally, muscles deformed slower with pain compared to non-painful conditions; however, only EO muscle displayed a statistically significant reduction in deformation velocity (p ≤ 0.00001). TDI for EO decreased from 0.065% per ms ( ± 0.038, 95% CI 0.057-0.074) to 0.053% per ms ( ± 0.035, 95% CI 0.046-0.061). Furthermore, characteristic inter-muscular TDI gradients were observed, directed from inner towards outer muscular layers, with TrA showing the lowest TDI and EO the highest. Conclusion Experimentally induced LBP suppresses deformation of the superficial abdominal muscles and increases the variability of local/deep muscles. Further research is required to confirm these observations. Graphical abstractThese slides can be retrieved under Electronic Supplementary Material.Key points 1. Low back pain (LBP) is associated with altered motor control and muscle activity.2. Tissue deformation index (TDI) was calculated to describe lateral abdominal wall muscle activity under experimentally induced low back pain.

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“…However, the effects of active or passive prolonged deep flexions of the trunk on low back muscle activity are not well understood. Indeed, no change has been observed in the timing of muscle activation onset for the lower erector spinae muscles following a static passive lumbar flexion period of 10 [ 19 ] or 15 minutes [ 14 ], whereas onset latency of the same muscles increased after one hour of static passive lumbar flexion [ 20 ]. Olson et al showed that no difference exists regarding onset latency of the lower erector spinae muscles following either active or passive trunk flexion-extension repetitions [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Muscle Activity Adaptations to Spinal Tissue Creep in the Presence of Muscle Fatigue

2016

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AimThe aim of this study was to identify adaptations in muscle activity distribution to spinal tissue creep in presence of muscle fatigue.MethodsTwenty-three healthy participants performed a fatigue task before and after 30 minutes of passive spinal tissue deformation in flexion. Right and left erector spinae activity was recorded using large-arrays surface electromyography (EMG). To characterize muscle activity distribution, dispersion was used. During the fatigue task, EMG amplitude root mean square (RMS), median frequency and dispersion in x- and y-axis were compared before and after spinal creep.ResultsImportant fatigue-related changes in EMG median frequency were observed during muscle fatigue. Median frequency values showed a significant main creep effect, with lower median frequency values on the left side under the creep condition (p≤0.0001). A significant main creep effect on RMS values was also observed as RMS values were higher after creep deformation on the right side (p = 0.014); a similar tendency, although not significant, was observed on the left side (p = 0.06). A significant creep effects for x-axis dispersion values was observed, with higher dispersion values following the deformation protocol on the left side (p≤0.001). Regarding y-axis dispersion values, a significant creep x fatigue interaction effect was observed on the left side (p = 0.016); a similar tendency, although not significant, was observed on the right side (p = 0.08).ConclusionCombined muscle fatigue and creep deformation of spinal tissues led to changes in muscle activity amplitude, frequency domain and distribution.

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Influence of static lumbar flexion on the trunk muscles' response to sudden arm movements

Cited by 11 publications

References 20 publications

Ultrasonographic Comparison of Deep Lumbopelvic Muscles Activity in Plank Movements on Stable and Unstable Surface

Ultrasonographic Comparison of Deep Lumbopelvic Muscles Activity in Plank Movements on Stable and Unstable Surface

Deformations of abdominal muscles under experimentally induced low back pain

Muscle Activity Adaptations to Spinal Tissue Creep in the Presence of Muscle Fatigue

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