Evaluation of the Lumbar Kinematic Measures That Most Consistently Characterize Lumbar Muscle Activation Patterns During Trunk Flexion: A Cross-Sectional Study

Objective: The aim of this study was to examine the effect of hyper pronated foot on postural control and ankle muscle activity during running and cutting movement (v-cut). Methods: In this Cross-Sectional study, 42 young physically active (exercising three times per week regularly) males participated in this study, including 21 with hyper-pronated feet and 21 with normal feet. Each participant completed a running and cutting task. Body postural control was measured using a force platform (1000Hz) which was synchronized with surface electromyography of selected ankle muscles. MATLAB software was used to process and analyze the data. One-away ANOVA was used to identify any differences between groups. Results: Differing muscle activation patterns in the surrounding ankle musculature (tibialis anterior, peroneus longus) through to reduced postural stability in the medial-lateral direction and increased vertical ground reaction forces were observed between groups. Conclusion: According to the obtained results it seems that subtalar hyper-pronation can be regarded as a factor affecting the biomechanics of cutting by changing activation patterns of the muscles surrounding the ankle, and reducing postural control of the body in medial-lateral direction, but not in anterior-posterior direction.

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Differences in Muscle Activation Patterns during Sit to Stand Task among Subjects with and without Intellectual Disability

BioMed Research International ◽

10.1155/2013/173148 ◽

2013 ◽

Vol 2013 ◽

pp. 1-7 ◽

Cited By ~ 8

Author(s):

Antonio I. Cuesta-Vargas ◽

Manuel González-Sánchez

Keyword(s):

Intellectual Disability ◽

Muscle Activity ◽

Muscle Activation ◽

Cross Sectional Study ◽

Lower Limbs ◽

Cross Sectional ◽

Activation Patterns ◽

Muscle Activation Patterns ◽

Sit To Stand ◽

Basic Features

The aim of this study is to analyse the differences in muscle activity between subjects who have intellectual disability and healthy subjects when they make the transition from sitting to standing positions. A cross-sectional study. A group of adults was divided into two subgroups: with and without intellectual disability (ID). The means of the basic features in both groups were 22.13 and 22.83 for age, 66.38 and 67.67 for weight, and 173.38 and 174.33 for height, for the ID () and without ID () groups, respectively. Each subject performed three sets of five repetitions during which, starting from sitting, they had to get up and sit on the chair. The recording of muscle activity was performed using surface electromyography taking the measures of muscle activity of different muscles of the lower limbs. The results showed differences in the pattern of muscle activity between groups during sitting to standing movement.

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Transversus abdominis and multifidus asymmetry in runners measured by MRI: a cross-sectional study

BMJ Open Sport & Exercise Medicine ◽

10.1136/bmjsem-2019-000556 ◽

2019 ◽

Vol 5 (1) ◽

pp. e000556

Author(s):

Ulrike H Mitchell ◽

A Wayne Johnson ◽

Patrick J Owen ◽

Timo Rantalainen ◽

Daniel Belavy

Keyword(s):

Low Back Pain ◽

Back Pain ◽

Muscle Activation ◽

Cross Sectional Study ◽

Transversus Abdominis ◽

Low Back ◽

Sectional Study ◽

Multifidus Muscle ◽

Cross Sectional ◽

The Right

ObjectiveThe transversus abdominis muscle (TrA) is active during running as a secondary respiratory muscle and acts, together with the multifidus, as trunk stabiliser. The purpose of this study was to determine size and symmetry of TrA and multifidus muscles at rest and with contraction in endurance runners without low back pain.DesignCross-sectional study.SettingA medical imaging centre in Melbourne, Australia.ParticipantsThirty middle-aged (43years±7) endurance-trained male (n=18) and female (n=12) runners without current or history of low back pain.Outcome measuresMRI at rest and with the core engaged. The TrA and multifidus muscles were measured for thickness and length (TrA) and anteroposterior and mediolateral thickness (multifidus). Muscle activation was extrapolated from rest to contraction and compared with the same and contralateral side. Paired t-tests were performed to compare sides and contraction status.ResultsLeft and right TrA and multifidus demonstrated similar parameters at rest (p>0.05). However, with contraction, the right TrA and multifidus (in mediolateral direction) were 9.2% (p=0.038) and 42% (p<0.001) thicker, respectively, than their counterparts on the left. There was no TrA thickness side difference with contraction in left-handed participants (p=0.985). When stratified by sex, the contracted TrA on the right side remained 8.4% thicker, but it was no longer statistically significant (p=0.134). The side difference with contraction of the TrA became less with increasing training age.ConclusionsRight-handed long-term runners without low back pain exhibit a greater right side core muscle activation when performing an isometric contraction. This activation preference diminishes with increasing training age.

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Implications on older women of age- and sex-related differences in activation patterns of shoulder muscles: A cross-sectional study

Journal of Women & Aging ◽

10.1080/08952841.2018.1521654 ◽

2018 ◽

Vol 31 (6) ◽

pp. 492-512

Author(s):

Cristina Lirio-Romero ◽

Christoph Anders ◽

Pedro De La Villa-Polo ◽

María Torres-Lacomba

Keyword(s):

Older Women ◽

Cross Sectional Study ◽

Sectional Study ◽

Cross Sectional ◽

Activation Patterns ◽

Shoulder Muscles ◽

Age And Sex

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Lumbar muscle structure and function in chronic versus recurrent low back pain: a cross-sectional study

The Spine Journal ◽

10.1016/j.spinee.2017.04.025 ◽

2017 ◽

Vol 17 (9) ◽

pp. 1285-1296 ◽

Cited By ~ 35

Author(s):

Dorien Goubert ◽

Robby De Pauw ◽

Mira Meeus ◽

Tine Willems ◽

Barbara Cagnie ◽

...

Keyword(s):

Low Back Pain ◽

Back Pain ◽

Cross Sectional Study ◽

Structure And Function ◽

Low Back ◽

Sectional Study ◽

Cross Sectional ◽

Lumbar Muscle ◽

Recurrent Low Back Pain ◽

And Function

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Evaluation of Lumbar Muscle Activation Patterns during Trunk Movements using High-Density Electromyography: A Preliminary Report

10.1109/embc46164.2021.9631075 ◽

2021 ◽

Author(s):

Feng Xu ◽

William Riden ◽

William Filer ◽

Xiaogang Hu

Keyword(s):

Preliminary Report ◽

Muscle Activation ◽

High Density ◽

Activation Patterns ◽

Muscle Activation Patterns ◽

Trunk Movements ◽

Lumbar Muscle

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Comparison of muscle activation of the transversus abdominis and muscle strength between individuals with low back pain, herniated disc and healthy individuals: a cross-sectional study.

10.21203/rs.3.rs-116631/v1 ◽

2020 ◽

Author(s):

Clecio Souza ◽

Sanderson Assis ◽

Karinna Costa ◽

Yago Medeiros ◽

Liane Macedo

Keyword(s):

Low Back Pain ◽

Back Pain ◽

Muscle Activation ◽

Cross Sectional Study ◽

Transversus Abdominis ◽

Herniated Disc ◽

World Population ◽

Low Back ◽

Sectional Study ◽

Cross Sectional

Abstract BACKGROUND: Low back pain and disc herniation are common problems in the world population, being characterized by discomfort in the region of the spine, resulting in functional capacity and quality of life reduced. Some of the causes of these conditions seem to be associated with the biomechanical imbalance of the muscles that act in the spine. There are methods to assess the level of activation and strength of the stabilizing muscles of the spine, such as the Pressure Biofeedback Unit (PBU). This study aims to compare the level of activation of the transverse abdomen muscle and back strength in healthy, low back pain and herniated disc individuals. METHODOS: a cross-sectional study was carried out with 30 men that were homogeneously distributed in three groups: healthy (HG), with low back pain (LBPG) and with herniated disc (HDG). The primary outcomes were the level of activation of the transversus abdominis, assessed by PBU, and back strength, assessed by dynamometry. Pain, flexibility and disability were evaluated as secondary outcomes.RESULTS: The mean age of the participants in this study was 30.47 ± 9.74 years. Regarding the activation of the transversus abdominis, no differences were found between groups (p = 0.155). For strength, LBPG and HDG were different compared to HG (p = 0.028 and p = 0.045, respectively). Pain was different between the HG and both LBPG and HDG (all p < 0.001). Regarding flexibility, no differences (p > 0.05) were found. The HDG had the highest disability score and was statistically different of the HG (p = 0.005), but with no difference from LBPG (p = 0.087).CONCLUSION: the activation of the tranversus abdominis is similar between healthy, non-specific back pain and herniated disc individuals; however, the latter presents a reduced level of strength and more disability.

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Hip and Core Muscle Activation During High-Load Core Stabilization Exercises

Sports Health A Multidisciplinary Approach ◽

10.1177/19417381211015225 ◽

2021 ◽

pp. 194173812110152

Author(s):

Zohre Khosrokiani ◽

Amir Letafatkar ◽

Bahram Sheikhi ◽

Abbey C. Thomas ◽

Peyman Aghaie-ataabadi ◽

...

Keyword(s):

Muscle Activation ◽

Activity Ratio ◽

Cross Sectional Study ◽

High Load ◽

Healthy Individuals ◽

Sectional Study ◽

Gluteal Muscle ◽

Cross Sectional ◽

The Right ◽

G Ratio

Background: There is some evidence that high-load lumbar stabilization exercises, such as back bridge, can recruit both local and global muscles. Hypothesis: Therapeutic exercises would optimize gluteus maximus (GMax), gluteus medius (GMed), multifidus (MF), and transversus abdominis (TrA) activation, while minimizing the activation of the tensor fascia latae (TFL) and erector spinae (ES) muscles in healthy individuals. Design: Cross-sectional study. Setting: Research laboratory. Level of Evidence: Level 4. Methods: In this cross-sectional study, surface electromyography (EMG) of GMax, GMed, TFL, TrA, MF, and ES was used to quantify the gluteal-to-TFL muscle activation (GTA) index and a ratio of local to global (L/G) lumbar muscles during (1) the elbow-toe exercise in the prone position, (2) the elbow-toe with right left lifted, (3) the hand-knee with left arm and right leg lifted, (4) the back bridge, (5) the back bridge with right leg lifted, (6) the back bridge with left leg lifted, (7) the side bridge with left leg lifted, (8) the side bridge with right leg lifted, and (9) the elbow-toe with right leg horizontally lifted exercises in healthy individuals (20 men, 20 women; age, 25 ± 4 years). Results: The back bridge exercise with left leg lift generated the highest L/G muscles activity ratio (L/G = 3.35) while the hand-knee exercise yielded the lowest L/G muscles activity ratio (L/G = 1.21). The side bridge exercise with left elbow and foot and lifting the right leg (GTA = 63.78), hand-knee exercise (GTA = 49.62), back bridge (GTA = 28.05), and elbow-toe exercise with left leg horizontally lifted (GTA = 23.02) generated the highest GTA indices, respectively. Meanwhile, the normalized EMG amplitude for GMax was significantly less than the TFL, for elbow-toe exercise ( P < 0.001), back bridge with left leg lift ( P = 0.001), side bridge exercise with the right elbow and foot and lifting the left leg ( P = 0.002), and elbow-toe exercise with right leg horizontally lifted ( P < 0.001). Conclusion: The highest GTA indexes were observed during (1) the side bridge lifting the dominant leg and (2) the hand-knee horizontally lifting dominant leg, respectively. The L/G ratio was highest during (1) the back bridge lifting nondominant leg, (2) back bridge, and (3) back bridge lifting dominant leg, respectively. This study supports the use of back bridge exercises to strengthen the MF and side bridges to improve gluteal muscle activation. Clinical Relevance: The highest GTA index was observed in the side bridge lifting the right leg. Highest L/G ratio was in the back bridge with nondominant leg lifted. This study supports the use of back bridge exercises to strengthen the MF. This study supports the use of side bridges to improve gluteal muscle activation.

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Activation of pelvic floor, lumbar and abdominal musculature during a simulated manual material handling task: a cross-sectional study

Fisioterapia e Pesquisa ◽

10.1590/1809-2950/20005727032020 ◽

2020 ◽

Vol 27 (3) ◽

pp. 335-344

Author(s):

Fernanda Cabegi de Barros ◽

Patricia Driusso ◽

Fernanda Roberto ◽

Mariana Vieira Batistão ◽

Mikaela Corrêa ◽

...

Keyword(s):

Pelvic Floor ◽

Material Handling ◽

Muscle Activation ◽

Cross Sectional Study ◽

Pelvic Floor Muscles ◽

Abdominal Muscles ◽

Sectional Study ◽

Cross Sectional ◽

Abdominal Musculature ◽

Manual Material Handling

ABSTRACT Pelvic floor muscles act synergistically with the abdominal and lumbar muscles contributing to spine and pelvic control. These muscles are activated during activities that increase intra-abdominal pressure, such as manual material handling. The aim of our study was to assess the electrical activity of the lumbar, abdominal and pelvic floor muscles during manual material handling with different loads. This is a cross-sectional study with sixteen nulliparous continent women aged between 18 and 35 years. An electromyographic system was used to evaluate the activation of the multifidus, erector spinal (iliocostal) and abdominal rectus muscles bilaterally (Trigno Wireless®, DelSys®, Boston, USA) and another for the pelvic floor muscles (Thought Technology Ltd, Canadá). Electromyographic data were collected during manual handling of three loads: light (1.5 kg), medium (4.5 kg) and heavy (11.3 kg). Repeated measures ANOVA was applied to compare the activation among loads at a 5% level of significance (α = 0.05). There was a significant increase in the activation of the lumbar and abdominal musculature as the load increases. No difference among loads was found for the pelvic floor muscle activation. Pelvic floor muscles did not increase their activation in function of the load, as occur for the lumbar and abdominal muscles in nulliparous continent women. These findings need to be confirmed for incontinent woman, since it could have clinical implications for designing both occupational tasks and pelvic floor rehabilitation.

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