• The Korean Journal of Pain
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• v.7 no.2
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• pp.307-313
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• 1994

Cutaneous stimulation has had a long history as a method of pain control. While there is general agreement that modern techniques such as electrical stimulation and massage often provide relief from acute pain and may in some cases significantly affect chronic pain, the mechanism by which these techniques affect pain remain unclear. Significant attention has been focused on the effects of stimulation on the autonomic nervous system(ANS) along with the increasing evidence of important ANS modulation of nociceptive activity throughout the pain pathway. However, inconsistent results on the presence and direction of ANS changes from cutaneous stimulation characterize the recent literature. The present study investigated a non-electrical cutaneous stimulation device, the Dermapoints massage roller, as well as an active placebo massage. The results indicate that the Dermapoints massage roller has both general effects associated with simple skin stimulation (such as increased skin temperature), as well as specific effects from increased stimulation by the tooth design of the roller. These specific effects include decreased muscle tension (at least for some muscle sites) and increased sympathetic activation. The results are consistent with a model of activation of Pacinian receptors as a possible mechanism for the antinociceptive properties of cutaneous stimulation.

• Journal of the Korean Society of Physical Medicine
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• v.10 no.3
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• pp.81-86
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• 2015

PURPOSE: Bridge exercises are broadly used to develop trunk co-activation patterns that promote spine stability. This study was to analyze the trunk muscle activity during bridge exercise with various shoulder support surface(stable, sling, Swiss ball). METHODS: The subjects were 20 healthy subjects in their twenties. Subjects were performed bridge exercise on 4 different shoulder support surfaces using stable and labile instruments. 1) Bridge exercise on a stable surface. 2) Bridge exercise with their shoulder on a stable bench. 3) Bridge exercise with their shoulder on a sling. 4) Bridge exercise with their shoulder on a Swiss ball. Rectus abdominis, erector spinae, internal oblique, external oblique muscle activities were measured using electromyography. RESULTS: There were significant differences in RA, EO muscles between performing each of the 4 exercises(p<.05). RA and EO was recorded the highest activity during the bridge exercise with their shoulder on a sling. The lowest activity was recorded during conventional supine bridge on a stable surface. There were no differences found for the EO/RA and IO/RA ratio. The EO/RA and IO/RA ratio was the highest in the bridge exercise with their shoulders resting on a stable bench. CONCLUSION: These findings suggest that change of shoulder support surface during bridge exercise may be useful for enhancing the trunk stability.

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 2002.05a
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• pp.17-25
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• 2002

Application of electrical stimulation in the red meat species (eg. beef and sheep) processing has been erratic around the world and this may reflect an incomplete knowledge of how to optimise the technology. Although it is well established that stimulation increases the rate of post-mortem glycolysis other biochemical and biophysical effects have been implicated with the use of this technology. On the basis of currently available knowledge, this mini-review seeks to examine the current theories about the effect of stimulation on post-mortem muscle. The classical view that stimulation prevents muscle from shortening excessively during rigor development has been expanded to include the possibility that it also results in physical disruption of muscle structure. The interaction of these effects with the acceleration of the rate of proteolysis through activation of the calpain protease system has not been comprehensively reviewed in the past. As a result of conclusion driven, this article highlights several areas that may prove fruitful for further research. The challenge for further development of electrical stimulation systems is optimisation of the activation of the enzyme systems in parallel with manipulation of chilling regimes so as to ensure rigor mortis is achieved at temperatures which minimise shortening. The potential of regional stimulation of sections of the carcass to achieve this outcome is worthy of study given the different fibre composition of muscles and temperature gradients.

• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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• v.26 no.2
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• pp.55-61
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• 2020

Background: This study demonstrate the effect of bridge exercise using sling device on the improvement of gluteal maximus and elector Spine EMG (electromyogram) in college student. Methods: 30 college students participated in this experiment and received bridge exercise using sling device for 30 minutes a day for four weeks. Results: The effects of bridge exercise using sling device were evaluated by measuring the muscle activation on gluteal maximus and elector spine. The differences between pre-test and post-test in G-max (p<.05) and right elector spine (p<.05) were significant. The difference between in G-max left and right side was not significant both before (p<.05) and after (p<.05) bridge exercise using sling. The difference between in elector spine left and right side was not significant before bridge exercise using sling (p<.05) but after bridge exercise using sling (p<.05). Conclusion: The results indicated that bridge exercise using sling device improved gluteal maximus and elector spine EMG. This study demonstrated the effectiveness of this new approach and provided a good guide to improve gluteal maximus and elector spine EMG.

• Journal of the Korean Society of Physical Medicine
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• v.18 no.3
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• pp.85-97
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• 2023

PURPOSE: This study analyzed the effectiveness of respiratory exercise in stroke patients conducted in Korea over the past 10 years (2012-2023). METHODS: Using the RISS, KCI, KISS, and NDSL databases, previous studies on stroke and respiratory exercise were searched, and relevant articles were collected following the PRISMA guidelines. Twelve articles were selected, and the quality of the studies was evaluated using the PEDro scale. RESULTS: Twelve studies were selected, and the qualitative evaluation of these studies showed that five articles received a score of six out of 10, while five articles received a score of five. The remaining two articles received scores of four and three, respectively. The intervention duration for respiratory exercise ranged from 20 to 30 minutes per session, with a frequency of three to five sessions per week, conducted over a period of three to eight weeks. These results indicated that respiratory exercise effectively improved the respiratory function, physical function, and respiratory muscle activation in stroke patients. CONCLUSION: Respiratory exercise was reported to have a positive affect the respiratory function, physical activity, and respiratory muscle activation in stroke patients.

• PNF and Movement
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• v.21 no.1
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• pp.87-94
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• 2023

Purpose: The present study aims to investigate the effects of a diagonal exercise pattern on selective activation of the upper extremity muscles using both normalization and isolation methods. Methods: In total, 17 asymptomatic subjects participated in this study. During the two diagonal patterns of exercise (diagonals 1 and 2), muscular activities of the upper trapezius (UT), lower trapezius (LT), serratus anterior (SA), anterior deltoid (AD), and infraspinatus (IS) were measured. The collected data were analyzed in two ways, according to the dominance of muscle activities (%Isolation) and according to normalized activities (%MVIC). Results: There were significant differences in LT, SA, AD, and IS between %MVIC and %Isolation (p<0.05), and the diagonal 1 pattern of exercise showed significantly more LT activities compared with the diagonal 2 pattern (p<0.05). Further, except for LT, there were no significant differences in muscle activities between the diagonal 1 and 2 exercises. Conclusion: The present study suggests that a diagonal pattern of exercise is advantageous for strengthening shoulder muscles, but caution is needed when applying to patients requiring selective strengthening. Regarding both the concentric and eccentric phases of exercise, there was no significant difference in muscular activation, except in LT, between the two diagonal patterns of exercises.

• Journal of Biomedical Engineering Research
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• v.45 no.2
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• pp.66-74
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• 2024

This study analyzed the occurrence of abnormal muscle coactivations based on the assistance of upper limb weight during reaching task in stroke patients. Nine chronic stroke survivors with hemiplegia performed reaching tasks using a programmable haptic robot. Electromyography (EMG) coactivation levels in the upper limb muscles were analyzed using a linear model describing the activation levels of two muscles when the patient's upper limb weight was assisted at 0%, 25%, and 50%. As the upper limb weight assistance of the haptic robot decreased, the magnitude of the EMG signal in both the deltoid and biceps muscles increased simultaneously on both the paretic and non-paretic sides. However, no difference was found between the paretic and non-paretic sides when comparing the slope of the linear model describing the activation relationship between the deltoid and biceps. The aforementioned results suggest that in some stroke survivors, the deltoids, triceps, and biceps on the paretic side may not be abnormally coupled when supporting the upper limbs against gravity. Furthermore, these results suggest that the combination of haptic robots and EMG analysis might be utilized for evaluating abnormal coactivations in stroke patients.

• Korean Journal of Applied Biomechanics
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• v.33 no.4
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• pp.119-127
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• 2023

Objective: This study aimed to compare the activity of the trunk and leg muscles while performing fente (in fencing) wearing weighted and waterbag vests. Method: The electromyography test was used to measure and analyze the activation of the trunk and leg muscles. Eight active fencers from B University (age: 19.5 ± 0.66 years, height: 179.75 ± 5.93 cm, weight: 72 ± 6.32 kg) were selected for this study. Results: According to the EMG analysis results of the 4 muscles measured in this study, left-right differences were observed for rectus abdominis and external oblique abdominis, but left-right differences between the groups were not significant. The gluteus medius muscle was not significantly different from the adductor muscle, but there were significant differences between the groups. Conclusion: The electromyographic analysis of the four muscles measured in this study revealed no significant difference between the left and right recti abdominis and external obliques depending on the vests. However, significant differences were observed between the left and right gluteus medius and adductor longus. Our results can be interpreted as the effects of the inherent movements involved in the fente. Furthermore, our results indicate that the weight transfer while wearing a waterbag vest, which provides an unstable environment, increased the activity of leg muscles.

• PNF and Movement
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• v.22 no.2
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• pp.315-324
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• 2024

Purpose: The aim of this study was to compare the activation of shoulder stabilizer muscles to variations of manual resistance during three-dimensional shoulder rehabilitation exercises. Methods: A total of 13 participants were included in this study. To normalize each muscle's activity, a maximal isometric voluntary contraction was performed by all participants. After receiving 30 minutes of training in three-dimensional shoulder rehabilitation exercises, participants randomly performed PNF arm and scapular patterns according to the intensities of manual resistance. The activities of the upper trapezius, lower trapezius, and serratus anterior were measured during these patterns. All exercises were performed for five seconds, and the average of three seconds, excluding the first and last seconds, was used for data analysis. Results: Lower trapezius activity was significant among manual resistance intensities. In both the PNF arm and scapular patterns, using 80% manual resistance of maximum resistance showed higher activity of the lower trapezius muscle compared to 20% of the maximum resistance. Conclusion: It is expected that PNF arm and scapular patterns, with varying intensities of manual resistance, can be used for early rehabilitation of patients with shoulder impingement syndrome.

• 한국체육학회지인문사회과학편
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• v.54 no.1
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• pp.505-514
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• 2015

The purpose of this study was to examine the muscle activation in trunk and low-limbs muscle during squat exercise on various instability surface. 10 subject performed squat with 75% of 1 repetition maximum (1RM) on a stable floor, stability blue, stability black and BOSU. Electromyographic (EMG) activity was measured trunk muscle such as rectus abdomina (RA), external obliques (EO), internal obliques (IO), multifidus (MF), and low-limbs muscle such as gluteus maximus (GMA), gluteus medius (GME), biceps femoris (BF), rectus femoris (RF), vastus medialis oblique (VMO), vastus lateral oblique (VLO), medialis gastrocnemius (MG), lateral gastrocnemius (LG), soleus (SOL) and anterior tibia (AT) when ascending and descending squat phase. One-way ANOVA repeated measure with Sheffe used to compare the muscle activity on the stable and unstable surface. Squat with BOSU ball induces higher muscle activity of IO, MF, GMA and GME compared with stability and stability blue and blackduring descending motion. Squat with BOSU ball induces higher muscle activity of GMA compared with stability and stability blue and blackduring ascending motion. This results suggested that BOSU ball in the squat could be effective increasing of trunk stability and gluteal muscle activity. However, there was no difference of squat on low-limb muscle with or without instability.