• 한국정밀공학회지
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• 제22권11호
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• pp.7-15
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• 2005

• The Journal of Korean Physical Therapy
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• 제25권5호
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• pp.316-321
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• 2013

Purpose: The aimed of this study was to investigate muscle activation related to postural stability according to different frequency of whole body vibration during quiet standing, to identify the most effective training conditions that cause the highest neuromuscular responses, and to evaluate the difference of EMG activation according to the anatomical position of the muscle - proximal or distal from the vibration platform. Methods: Eighteen healthy subjects voluntarily participated in this single-group, repeated-measures study in which EMG data from upper trapezius, rectus abdominalis, external oblique abdominalis, elector spinae, gluteus maximus, rectus femoris, semitendinosus, and gastrocnemius were collected over different frequencies (0-5-10-15-20-25Hz) for each subject during quiet standing. Results: We observed a statistically significant difference in the mean values of %RVC of muscular activation according to different frequencies of whole body vibration during quiet standing in all muscles (p<0.05). Conclusion: Our results indicate that lower frequencies of vibration result in low muscular activation, and higher frequencies elicit high muscular activation. However, the most effective training condition that caused the highest activation was 20 Hz. In addition, the proximally located lower extremity muscles (GCM, RF, ST, GM) showed higher activation than the distally located trunk and neck muscles (ES, EO, RA, UT) together with increasing frequency.

• 한국응용과학기술학회지
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• 제35권3호
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• pp.940-947
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• 2018

본 연구의 목적은 플랫 벤치 프레스에서 하지를 지면에 지지한 자세와 하지를 벤치에 지지한 자세에서의 동작 수행 시 대흉근 및 척추기립근의 근 활성 분석을 통해 벤치 프레스 응용동작에 뒷받침 할 만 한 근거자료를 찾고, 운동수행에 관한 효율적인 기초자료를 제시하는데 있다. 대상자는 아마추어 보디빌더 4명, 헬스 트레이너 2명으로 선정하였다. 측정을 위해 연구대상들의 대흉근과 척추기립근에 표면전극을 부착하였다. 벤치 프레스에 대한 동작구간을 설정하고 하지를 지면에 지지한 동작과 하지를 벤치에 지지한 동작으로 나눠 피험자별 10RM으로 각각 1세트씩 실시하는 방식으로 진행하였다. 데이터는 SPSS 20.0을 통하여 분석하였으며 다음과 같은 결과를 얻었다. 플랫 벤치 프레스 동작 시 하지의 지지 유형이 대흉근에는 영향을 미치지 않았지만, 척추기립근에서는 차이가 나타났다.

• 대한물리의학회지
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• 제4권3호
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• pp.165-174
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• 2009

Purpose：This study was performed for effects of gait training on treadmill and stable surface which influenced on the lower limbs muscular activity needed in gait, plantar foot pressure with hemiplegic patients caused by cerebrovascular accident. Methods：Two groups of adult hemiplegia(n=20) were allocated randomly in this study: treadmill gait training group and control group. The gait training program was provided to experimental groups for 8 weeks (5 times a week). Measurements of pre and post experiment were plantar foot pressure. For measuring muscular activation rectus femoris, biceps femoris, tibialis anterior, gastrocnemius were detected. Results：The results of this study showed that in comparison of pre and post changes of gait training, the treadmill gait training group has noticeable changes than other groups in activity of rectus femoris and tibialis anterior, the control group revealed statistically significant differences in plantar foot pressure Toe2-5, M1, M3, M5, MF area, activity of gastrocnemius. Conclusion：These results mean gait training resulted by treadmill, stable surface provides effective muscle activation and plantar foot pressure with stroke.

• 대한물리의학회지
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• 제13권1호
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• pp.129-136
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• 2018

PURPOSE: This Study compared the level of activation of the muscles around the shoulder at the time of abduction through Pilates breathing and regular breathing by using quantified biofeedback. METHODS: Experiment was conducted on 25 healthy males and females in the age bracket of 20's~30's as the subjects. The level of activation of muscles displayed at the time of Pilates breathing were measured at intercostal (InC) muscle, transverse abdominis (TrA) muscle, internal oblique (IO) muscle and external oblique (EO) muscle by using surface electromyogram (EMG) and were provided as biofeedback. Moreover, the changes in the level of muscular activation at sternocleidomastoid (SCM) muscle, upper trapezius (UT) muscle and Deltoid (Del) muscle, which are the muscles around the shoulder, at the time of abduction of shoulder during Pilates breathing and regular breathing were measured. RESULTS: When abduction of shoulder is executed through Pilates breathing, the level of muscular activation of UT muscle was $11.56{\pm}7.10%$ at the time of exhaling of Pilates breathing and $17.54{\pm}9.57%$ at the time of exhaling of regular breathing. Del muscle also displayed lowered level of muscular activation at the time of Pilates breathing with $12.88{\pm}5.80%$ during inhaling and $15.14{\pm}5.49%$ during exhaling. CONCLUSION: In conclusion, the results could be interpreted as indicating that the muscle activities of upper trapezius and deltoid muscle were decreased based on Pilates breathing more than those on regular breathing.

• 한국운동역학회지
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• 제18권4호
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• pp.115-124
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• 2008

본 연구는 만성 요통환자의 치료적 중재에서 체간 안정화 운동의 방법 중 매트 볼 운동군, 슬링 운동이 요통장애지수, 근력, 근활성도에 미치는 영향을 알아보기 위해 수행되었다. 각 중재 군들은 6주 동안 주 5회, 운동 프로그램을 실시하였으며, 대조군은 일반적 중재를 실시하여 다음과 같은 결론을 얻었다. 1. 요통장애지수는 중재 기간에 따라 매트 볼 운동군, 슬링 운동군에서 중재 기간이 증가됨에 따라 감소하여 통증과 장애정도가 효과적으로 감소하였다. 2. 근력은 매트 볼 운동군, 슬링 운동군은 모든 각도에서 중재 6주 후에 증가하여 효과적으로 증가하였다. 3. 근활성도는 복횡근은, 내복사글 복직근은 매트 볼 운동군, 슬링 운동군에서 근력이 증진됨에 따라 근활성도는 증가하였고, 외복사근은 매트 볼 운동군에서만 증가하였다. 본 연구를 결과를 종합해 보면 요통환자의 치료적 중재에서 체간 안정화 운동은 각 기간 별로 요통장애지수, 근력과 각 근육의 근활성도에서 효율적 영향을 미치며, 보다 많은 적용을 통하여 지속적인 연구가 이루어지기를 희망한다.

• The Journal of Korean Physical Therapy
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• 제27권5호
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• pp.325-331
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• 2015

Purpose: This study attempts to understand the effect of stabilization exercise of biofeedback scapular on muscle activity and functional evaluation of the upper extremity in stroke patients. Methods: Patients were divided into two groups; a biofeedback scapular stabilization exercise group comprised of 8 patients and a task-oriented training group including another 8 patients, and 30-minute exercise was performed 5 times a week for 8 weeks. Electromyogram was used to measure muscular activity of lower trapezius, deltoid middle, and serratus anterior. Fugl-Meyer Assessment and Manual Function Test were used to evaluate functions of the muscles mentioned. Results: Significant difference was observed in the comparison group before and after exercise in muscular activity of lower trapezius, deltoid middle, and serratus anterior, Fugl-Meyer Assessment, and Manual Function Test. Conclusion: Therefore, we could see that biofeedback scapular stabilization exercise is more effective than task-oriented training in facilitating muscle activation and functional capacity of upper limb.

• 한국전문물리치료학회지
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• 제14권3호
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• pp.72-80
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• 2007

The purpose of this study was to verify the effects on fine motor, muscle strength (hand-grip), explosive muscular strength (vertical jump) and muscular endurance (sit-up) after ingesting coffee. Hence this study targeted a sample group of 38 healthy men in their twenties, without cardiac disorders and muscle disorders and none of them were hypersensitive to caffeine with symptoms such as palpitation and dyspnea. Nineteen of them ingested coffee, whereas the other nineteen men ingested decaffeinated coffee at the same amount. The amount of coffee was controlled by weight so as to regulate intake to 6 mg caffeine per kg. Research material was evaluated through O'Conner's finger dexterity test, hand-grip strength test, vertical jump test and sit-up test. The data were analyzed by means of paired t-test and ANCOVA. The material was then, analyzed by means of two-way ANOVA in order to verify the effect of one or two cups of coffee on fine motor and hand-grip strength. All parameters were measured by an independent observer. The results were as follows: There were no significant differences to fine motor, hand-grip strength, vertical jump, sit-up before and after drinking decaffeinated coffee, but there was a difference to those before and after drinking caffeine coffee. There was no significant difference to hand dexterity and hand-grip strength in one or two cups of coffee. Intake of a certain dosage of caffeine effects activation of muscles working in a short period based on the results. As a consequence, intake of certain dosages of caffeine was beneficial to enhance efficiency of activity during exercises, but it is will be difficult to obtain the desired result with only one or two cups of coffee.

• 대한정형도수물리치료학회지
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• 제20권1호
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• pp.39-45
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• 2014

Background: The purpose of this study is to identify effects of neuro-muscular control training on vastus medialis oblique (VMO) after menisectomy of the knee. Methods: The subjects of this study are women aged 42 and 39 each who did menisectomy. Case 1 was applied quadriceps setting exercise and neuro-muscular contrlol training and case 2 was applied quadriecps setting. Intervention was done 5 times a week for 2 weeks. Measurement of muscle activity on VMO and vastus lateralis (VL) was standardized signals of each muscle to %RVC using surface EMG. Results: On comparison of exercise before and after on VMO and VL, VL activation of case 2 was increased more than case 1. Conclusion: Quadriecps-setting exercise and selective neuro-muscular control training of VMO is effective intervention on VMO activity and muscle activity ratio of VMO to VL.

• The Journal of Korean Physical Therapy
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• 제28권1호
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• pp.59-63
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• 2016

Purpose: The objective of this study was to identify determine the effect of the strap height on muscular activity of trunk and lower limbs muscles during bridging exercise with a sling. Methods: The subjects of the study were 17 healthy male adults. In order to For measurement of muscular activity, body surfaces electrodes were placed on areas including erector spinae, multifidus muscles, gluteus maximus, and hamstring and the results was were recorded based on three different heights of strap, which are Levels 1, 2, and 3. Results: The muscular activities in erector spinae, multifidus muscle, and gluteus maximus were significantly different in at all three heights (p<0.05)., Level 3 showed the highest the compared to Levels 1 and 2. In hamstring muscle, there was significant difference in levels 1 and 2, also and levels 1 and 3 (p<0.05),. Bbut there was no significant difference between 2 and 3. The ration of muscular activities in multifidus muscles/erector spinae and gluteus maximus/hamstrings were significantly different for all three strap heights (p<0.05). Also, Level 3 showed higher than 1 or 2. Conclusion: The results of this study suggests to adjustment of the level III, that which has high activity level of multifidus and gluteus maximus affecting trunk stability during bridging exercise using a sling.