Showing 7 results for Electromyography
Rahman Sheikhhoseini, Mohammadhosein Alizadeh, Kieran O'Sullivan, Mahyar Salavati, Meisam Sadeghisani, Marzieh Movahhed, Elham Shirzad,
Volume 6, Issue 3 (10-2015)
Abstract
Aim and Background: There is little doubt that patients with low back pain (LBP) use their body differently in comparison with healthy individuals. The purpose of this review was to investigate changes in biomechanical perspective which may be present in athletes with LBP. Methods and Materials: TThe search strategy for this review consisted of an electronic database search of full text in PUBMED database. Findings: From 461 records that were initially identified through the PUBMED database, 28 studies met the eligibility criteria, most of which were cross-sectional in nature. The studies demonstrate that athletes with LBP exhibit a range of biomechanical perspective changes in the trunk, lumbar spine, pelvis and lower extremities. However, inconsistencies were apparent between the results. Conclusions: Athletes with LBP demonstrate some biomechanical perspective changes during sport specific and non-sport specific functions. More studies, especially large prospective studies which control for non-mechanical factors are required to determine the relationship between LBP and biomechanical perspective changes in athletes.
Mr Mohammad Yadegaripour, Dr Malihe Hadadnezhad, Dr Ali Abbasi, Dr Freshteh Eftekhari,
Volume 10, Issue 2 (7-2019)
Abstract
Aims and background: Low back pain is one of the most common musculoskeletal disorders leading to disability in the world. Several studies have shown that long-term sitting is associated with low back pain and discomfort. The weakness of core stability is referred to as one of the factors associated with the low back pain. So the purpose of this study was the study of relationship between core stability and back discomfort and muscle activity during laptop work in the sitting position. Materials and methods: Twenty young healthy males participated in this study. They performed laptop work (involving computer mouse work and typing task) in the sitting position. The electromyographic activity of back muscles and the posture of the lumbar spine were recorded in the first and last 2 min of each task. At the end of each task, the participants scored their back discomfort. Core stability was measured using McGill’s tests (including flexor, extensor, left side bridge and right side bridge tests). The Pearson and partial correlation test were used for analysis of correlation between variables. Finding: There was a negative significant correlation between core stability and activity level of the lumbar erector spinae (r= -57, p= 0.013) and left multifidus (r= -.50, p= 0.034), but correlation between discomfort and core stability was not found (r= 0.08, p= 0.748). Conclusion: Core stability appears to be an effective factor on the back muscles activation pattern during sitting. But confirmation of this issue requires further research. It is recommended to take in to account the core stability factor ,in the design of low back pain prevention interventions for people who committed sanitary works for long time.
Mr Behnam Gholami Borujeni, Dr Ali Yalfani,
Volume 10, Issue 3 (9-2019)
Abstract
Aims and background: Aims and background: Lumbar muscle imbalances could affect the lower extremity. The aim of present study was to survey the relationship between pain and lumbar arch with ankle muscle activity and comparison these variables in males and females with chronic non-specific low back pain when implementing single leg squat. Materials and methods: 47 Participants with chronic nonspecific low back pain (CNLBP) were selected in this study (male=22 and female=25). Visual Analogue Scale (VAS) was used to evaluate the LBP intensity. Lumbar lordosis curve was recorded using a flexible ruler. The Participants perform single leg squat position and dominant foot electromyography would be measured when the person was in the single leg squat position. The Pearson correlation coefficient was used to examine the relationship between variables and Independent t test was used to compare variables between males and females. Findings: The results showed there were positive and significant correlation between pain of tibialis anterior muscle activity and peroneus longus muscle in males and females. Conclusion: Regarding the results of this study, it would be concluded that low back pain is one of those factor that may increase ankle muscle activity. Treatment of low back pain could decrease the risk of injury caused by changes in postural control mechanisms and proprioception in lumbar and other joints in the kinetic chain, especially the ankle joint.
Amirali Jafarnezhadgero, Ghader Ghane, Arefeh Mokhtari Malek Abadi, Aydin Valizadehorang,
Volume 11, Issue 4 (12-2020)
Abstract
Aims and background: The aim of the present study was to compare the electromyography activity of the lower
limb muscles during three different running patterns in pronated feet individuals with and without low back pain.
Material and Methods: The present study was cross-sectional. 45 adult males (15 male with pronated feet, 15 male
with both low back pain and pronated feet and 15 male with normal feet) volunteered to participate in the present
study. Electromyography activity of the eight lower limb muscles (gastrocnemius, soleus, peroneus longus, tibialis
anterior, vastus lateralis, vastus medialis, rectus femoris, and gluteus medius) were recorded during three running
patterns. MANOVA test was used for statistical analysis.
Results: The electromyography amplitude of the tibialis anterior during loading response phase while running with
forefoot pattern in both pronated group (p=0.042) and pronated feet individuals with low back pain (p=0.039) were
lower than that healthy group. Main effect of running pattern on electromyography amplitude of vastus medialis and
rectus femoris muscles in three groups were not statistically significant during loading phase (p>0.05).
Conclusion: Foot pronation affects the activity of the lower limb muscles by structural alterations in the ankle and
foot joints. These changes in the pronated feet individuals with low back pain were greater than that pronated feet
individuals without low back pain.
Milad Piran Haml Abadi, Amirali Jafarnezhadgero, Sajad Anoushirvani,
Volume 12, Issue 1 (4-2021)
Abstract
Aims and background: Low back pain is a common ailment that affects about 80% of the population at some
point in their life time. Using a brace is a method to control pain that physiotherapists recommend it. However, the
scientific evidence about the effects of different braces in low back pain patients is limited. Therefore, the aim of this
study was to evaluate the effects of two thoracolumbosacral braces on electromyography activity) and pain index of
low back pain patients during walking.
Materials and Methods: In this quasi-experimental study, 15 male and female subjects with low back pain
volunteered to participate in this study. Subjects walked in three conditions (without braces, simple braces and
sensor braces). An 8-channel wireless electromyography system was used to record the activity of the muscles of the
back and lower limb during walking. Visual scale index was also used to record pain and comfort. Repeated measure
ANOVA test was used for statistical analysis. Significance level was set at p=0.05.
Results: Finding demonstrated that the pain value during using brace with sensor was lower than that simple brace
(P<0.05). However, comfort value during using simple brace was the lowest (P<0.05). Frequency content of biceps
femoris during push off while using brace with sensor was greater than that simple brace condition (p=0.007).
Conclusion: In general, it can be said that the use of tracholambosacral braces with sensor because of reduction
in pain and increment in frequency content of biceps femoris muscle is more effective than that simple brace in
patients with low back pain.
Amirali Jafarnezhadgero, Mohamad Rahim Amiri, Ehsan Fakhri Mirzanag, Sina Bolboli,
Volume 14, Issue 2 (8-2023)
Abstract
Introduction: Low back pain is a syndrome with multifactorial etiology that affects 6.8% of the world population during life time. Therefore, the aims of this study was to examine the effect of rehabilitation with medicine ball on muscle activity in low back pain.
Patients during Walking
Methods: The present study was a clinical trial. The statistical population of the present study included patients with low back pain that randomly divided into two intervention (age: 25.4±2.5 years, weight: 79.04±3.06 kg, height: 176.03±7.04 cm) and control (age: 25.8±2.09 years, weight: 79.00±3.01 kg, height: 176.06±7.01cm) group. The intervention group performed resistance training with medicine ball and the control group participated in pre-test and post-test only, without performing any training. were recorded muscle activities of the gastrocnemius lateral (GAS-L), biceps femoris (BF),semitendinosus (ST), vastus medialis (VM), external abdominal (ABD-L), rectus abdominal (ABD-R) and erector spinae (ES).
Results: The results of the present study showed an increase in the frequency spectrum of the rector femoris muscle during the heel contact and push off in experimental group in post-test compared to the pre-test, and indict a statistically significant difference, Also, the frequency spectrum of the right abdominal muscle in the experimental group has decreased in the post-test compared to the pre-test during the pushing phase, and indict a statistically significant difference .
Conclusion: Rehabilitation with a medicine ball leads to increase the activity the quadriceps muscles in low back pain patients, and it seems to be important factor in decrees the shock absorption during walking.
Milad Piran Hamlabadi, Amirali Jafarnezhadgero, Kimia Hosseinpour,
Volume 14, Issue 2 (8-2023)
Abstract
Background: The aim of the present study was to comparison of the effect of polyurethan thermoplastics military boots mileage on lower limb muscle activities during running in people with and without back pain.
Methods: The statistical population of the present study consisted of healthy men and with low back pain in Ardabil province. A statistical sample of 30 people aged 20-25 years was selected by available sampling and participated in the present study. Statistical samples were divided into two groups. There were 15 patients in the low back pain group, and the second group of 15 people as the healthy group. They received two new and used pair of boots. They were made of thermoplastic polyurethane. muscle activities of the right leg were recorded during running. Two-way ANOVA was used for statistical analysis at a significance level of 0.05.
Results: Findings showed significant main effect of boot type for rectus femoris (p=0.037 d=0.146) during loading phase and gluteus Medius (p=0.006 d=0.242) during push-off phase. Findings showed significant main effect of boot-by-group interactions for rectus femoris during mid-stance (P=0.020; d=0.161).
Conclusion: The results of this study showed that the type of boots used can be effective in preventing lower limb injuries and absorbing shock and impact in people with low back pain, on the other hand, the use of new thermoplastic polyurethane operational boots is suggested for people with low back pain. Our findings showed that the observed changes in muscle activity variables are more obvious in second-hand boots. It seems that changing boots after 6 months of heavy wearing is suitable for people.
