• 제목/요약/키워드: MUSCLE ACTIVITY

검색결과 2,680건 처리시간 0.023초

Neurokinin A와 그 유도체의 평활근 수축 활성 (Smooth Muscle Contractile Activities of Neurokinin A and Its Derivatives)

  • 장태식;이봉헌;강신원
    • 생명과학회지
    • /
    • 제8권4호
    • /
    • pp.395-399
    • /
    • 1998
  • Neurokinin A(NKA) and its derivatives ([Nle$^{7}$NKA,[Leu$^{7}$NKA] were synthesized by solid phase peptide synthesis method using Fmoc-TFA strategy and their smooth muscle contractile activities were measured to examine the structural effect of alkyl group at the 7th amino acid NKA on the smooth muscle contractile activity. The smooth muscle contractile activity. The smooth muscle contractile activities of [Nle$^{7}$]NKA and [Leu$^{7}$]NKA were only 5.64% and 1.55%, respectively when compared with NKA. This result suggested that the more three dimensional structure of th 7th amino acid as well as the whole message segment of NKA would be necessary to show the biological activity.

  • PDF

The Effect of One Leg Deadlift Exercise on the Muscle Activity of Lower Extremities according to the Weight Characteristics

  • Park, Tae Geun;Lee, Jae Kwang
    • The Journal of Korean Physical Therapy
    • /
    • 제34권5호
    • /
    • pp.267-271
    • /
    • 2022
  • Purpose: This study examined the effects of a kettlebell and aqua bag on the gluteus maximus, gluteus medius, and vastus medialis lower extremity muscle strength during a one-leg deadlift, a top-down exercise. Methods: Twenty healthy adults were enrolled in the one-leg deadlift exercise under two conditions. The muscle activity of the gluteus maximus, gluteus medius, and vastus medialis was measured by surface electromyography (S-EMG). A paired t-test was used for statistical analysis, and the statistical significance criteria were set to p<0.05. Results: A comparison of the muscle activity according to the degree of contraction of the gluteus maximus revealed low muscle activity in AD exercise compared to KD exercise (p<0.05), and there was no significant difference in the gluteus medius and vastus medialis (p<0.05). Conclusion: These results suggest that when the one-leg deadlift exercise is performed according to the weight characteristics, the gluteus maximus is suitable for intervention using a kettlebell, and the gluteus medius and vastus medialis are more suitable for intervention by providing instability using an aqua bag.

몸통 안정화 방법에 따른 몸통근육의 근활성도 비교 (Comparison of Trunk Stabilization Maneuver on Surface Electromyographic Activity of Trunk Muscle)

  • 김현희;정신호
    • 근관절건강학회지
    • /
    • 제20권3호
    • /
    • pp.189-196
    • /
    • 2013
  • Purpose: The purpose of this study was to investigate electromyographic (EMG) activity of deep and superficial trunk muscles during trunk stabilization exercises with and without stabilization maneuvers. Methods: The relative muscle activity ratios and local muscle activities of 25 healthy males were measured using the 8 channel surface EMG system (Myosystem 1400A, Noraxon Inc., U.S.A). The surface EMG activities were tested during performing abdominal hollowing maneuver (AHM), abdominal bracing maneuver (ABM) and no stabilization maneuver (NSM) in random order. Data were analyzed using $1{\times}3$ repeated measures ANOVA. Results: During bridging exercises, the EMG activity ratio of transverse abdominis/internal oblique abdominis relative to rectus abdominis was significantly lower in NSM than in AHM and ABM. During bridging and kneeling exercises, the EMG activity ratio of multifidus relative to erector spinae was significantly higher in AHM than in NSM. Conclusion: The AHM can be clinically used by the physical therapist to activate selectively the trunk muscles when designing selective training programs for patients.

뇌졸중 환자의 무릎관절과 발목관절에 비탄력테이핑 적용이 근활성도와 균형 및 보행에 미치는 영향 (Effects of Incorporating Non-elastic Taping into PNF Techniques on Muscle Activities, Balance, and Gait in Patients with Chronic Stroke)

  • 김현우;박영한
    • 대한물리의학회지
    • /
    • 제15권1호
    • /
    • pp.113-121
    • /
    • 2020
  • PURPOSE: The study examined the effects of non-elastic taping on the knee and ankle joints of stroke patients to increase muscle activity, balance and gait ability. METHODS: In this study, 10 stroke patients were assigned to experimental group (knee and ankle joint non-elastic taping and PNF technique) and control group (PNF technique). The experimental group applied the PNF technique for 30 minutes after attaching the inelastic tape, and the control group performed the PNF technique for 30 minutes. five times a week for a total of four weeks (20 times). RESULTS: The muscle activity of Vastus Medialis and Tiblialis Anterior showed significant differences between the experimental and control groups. BBS and 10MWT also showed significant differences between the experimental and control groups. CONCLUSION: In this study, the muscle activity, balance and walking on the paraplegic side of stroke patients using inelastic taping, and applied inelastic taping on two joints in a different way from the previous study, Therefore, it will have the advantage of increasing paralysis side muscle activity and improving balance and walking ability.

평지와 내리막 달리기 시 하지 관절의 운동학적 분석과 하지 근육의 근 활성도에 관한 연구 (The Kinematic Analysis of the Lower Limbs Joint and the Study of Muscle Activity for the Lower Limbs Muscle During the Level and Downhill Running)

  • 문곤성;최지영
    • 한국운동역학회지
    • /
    • 제16권2호
    • /
    • pp.9-19
    • /
    • 2006
  • The purpose of this study was to analyze the kinematic variables of the lower limbs joints and the muscle activity for lower limbs during the level and downhill running. The subjects were 6 males of twenties and required to run on the level and downhill which was -7% grade treadmill at 8.3km/h. The running performances were filmed by high speed video camera and EMG signal was gained by ME3000P8 Measurement Unit. Rectus femoris(RF), Vastus lateralis(VL), Gluteus medius(GLU), Biceps femoris(BF), gastrocnemius medial head(GM), gastrocnemius lateral head(GL), Soleus(SO), Tibialis anterior(TA) were selected. The result of this study were as follows: 1. Ankle, knee, hip joint in downhill running showed less movement than the level running but, no significant difference. 2. VL and BF during the support phase in downhill running showed Iess muscle activity than the level running. but RF showed the opposite result. 3. GM, GL, SO adn TA during the supports phase in downhill running showed less muscle activity than the level running.

뇌졸중 환자의 무릎관절 신전 등척성 운동 시 의자 종류와 골반통제가 넙다리네갈래근 근력과 근활성도에 미치는 영향 (The Influence of Different Chair Type and Pelvic Control on Quadriceps Muscle Activity and Strength During Knee Joint Extension Isometric Exercise in Hemiplegic Patients)

  • 박용하;김택훈
    • 한국전문물리치료학회지
    • /
    • 제16권3호
    • /
    • pp.32-41
    • /
    • 2009
  • The purpose of this study was to suppose basis data the influence of different chair type and pelvic control on quadriceps muscle activity and strength during knee joint extension isometric exercise in hemiplegic patients. This research were investigated in ten healthy adults and tens hemipelgic patients. Surface electromyography (EMG) and Biodex system were used to collect kinematic data and muscle activity, respectively. Independent t-test, paired t-test and one-way repeated ANOVA were used to determine a statistical significance. The results showed as follows: (1) Posterior pelvic angles in healthy group and hemiplegic group were significantly different on isokinetic equipment (p<.05). (2) Different chair type and pelvic control on quadriceps muscle activity and strength were significantly different in hemiplegic patients (p<.05). From the result of this research, posterior pelvic angle control during knee joint extension isometric exercise in hemiplegic patients on isokinetic equipment is necessary to increase quadriceps muscle strength in hemiplegic patients.

  • PDF

교각운동과 들어올리기 패턴결합 교각운동이 하지 근 활성도에 미치는 영향 (The Effect of Lower Extremity Muscle Activity on Bridging Exercise and Combined Lifting pattern Bridging Exercise)

  • 윤혜진;김경환;박성훈;이민영
    • PNF and Movement
    • /
    • 제10권4호
    • /
    • pp.49-55
    • /
    • 2012
  • Purpose : The purpose of this study was to assess the effects of bridging exercise and combined lifting pattern bridging exercise on the lower extremity muscle activity. Methods : Twenty-five healthy adults volunteered to participate in this study. Subjects were required to complete following bridging exercises. Muscle activity was measured by QEMG-4 system(LXM 3204, Laxtha Korea). A paired t test was used to determine the influence of muscle activity for each exercise and descriptive statistics was used to characteristics of the subjects. Results : The biceps femoris, tibialis anterior, gastrocnemius of combined lifting pattern bridging exercise showed significance excepted vastus medialis(p<.05). In the case of men, biceps femoris showed significance in the combined lifting pattern bridging exercise(p<.05). In the case of women, biceps femoris and tibialis anterior showed significance in the combined lifting pattern bridging exercise(p<.05). Conclusion : The combined lifting pattern bridging exercise was more increased than bridging in lower extremity muscle activation. This result will be used for knee joint stabilizing exercises and biceps femoris strength training.

Effect of Bridge Exercise Combined with Functional Electrical Stimulation on Trunk Muscle Activity and Balance in Stroke Patients

  • Kang, Jeongil;Jeong, Daekeun;Heo, Sinhaeng
    • 국제물리치료학회지
    • /
    • 제12권2호
    • /
    • pp.2323-2330
    • /
    • 2021
  • Background: Stroke patients have weak trunk muscle strength due to brain injury, so a single type of exercise is advised for restoring functionality. However, even after intervention, the problem still lies and it is suggested that another intervention method should be applied with exercise in order to deal with such problem. Objectives: To Investigate the effect of bridge exercise combined with functional electrical stimulation (FES) on trunk muscle activity and balance in stroke patients. Design: Randomized controlled trial. Methods: From July to August 2020, twenty stroke patients was sampled, ten patients who mediated bridge exercises combined with functional electrical stimulation were assigned to experiment group I, and ten patients who mediated general bridge exercises were assigned to experiment groupII. For the pre-test, using surface EMG were measured paralyzed rectus abdominis, erector spinae, transverse abdominis/internal oblique muscle activity, and using trunk impairment scale were measured balance. In order to find out immediate effect after intervention, post-test was measured immediately same way pre-test. Results: Change in balance didn't show significant difference within and between groups, but muscle activity of trunk was significant difference rectus abdominis and erector spinae within groups I (P<.01), also between groups was significant difference (P<.05). Conclusion: Bridge exercise combined with FES could improve trunk function more effectively than general bridge exercise due to physiological effect of functional electrical stimulation.

전신진동운동, 보행 및 런닝과의 근육활성량 및 근 발현 특성 비교 분석을 통한 전신진동운동 효과검증 (The Effectiveness Verification of Whole-body Vibration through Comparative analysis of Muscle activity for Whole-body Vibration Exercise, Walking and Running)

  • Moon, Young Jin;Cho, Won Jun
    • 한국운동역학회지
    • /
    • 제31권1호
    • /
    • pp.59-63
    • /
    • 2021
  • Objective: Through comparative analysis of muscle activity for whole-body vibration, walking and running movements, it is to verify the training effect of whole-body vibration exercise in terms of amount of exercise and muscle activity characteristics. Method: Flat ground walking and slope walking (10 degrees) at a speed of 5 km/h, flat ground running and slope running (10 degrees) at a speed of 11 km/h for running were performed on treadmill, and squats were maintained at 12 Hz, 20 Hz, and 29 Hz conditions on Whole body vibration exercise equipment (Galileo). Muscle activity was analyzed through EMG analysis device for one minute for each condition. Results: The Anterior Tibialis and Erector Spinae show greater exercise effect in whole-body vibration than walking and running. The Rectus Femoris, Biceps Femoris, and Gluteus Maximus have the best effect of exercise in flat running. Whole-body vibration exercise showed greater muscle activation effect as the frequency increased, and exercise effect similar to walking during the same exercise time. Conclusion: The amount of exercise through Whole-body vibration exercise was similar to that of walking exercise, and the Anterior Tibialis and Erector Spinae shows better exercise effect than walking and running.

Comparison of the Cross-Sectional Area of Longus Colli and Muscle Activity of Sternocleidomastoid in Subjects With Forward Head Posture on the Two Craniocervical Flexion Methods

  • Son, Min-chan;Hwang, Ui-jae;Jung, Sung-hoon;Ahn, Sun-hee;Kim, Hyun-a;Kwon, Oh-yun
    • 한국전문물리치료학회지
    • /
    • 제25권2호
    • /
    • pp.62-70
    • /
    • 2018
  • Background: The craniocervical flexion (CCF) exercise is one of the effective exercise in correcting forward head posture (FHP). However, some people with FHP achieve CCF with compensatory movements, for example, low cervical flexion using superficial neck flexors such as the sternocleidomastoid (SCM) muscle. No study has yet investigated whether a dual­pres ure biofeedback unit (D-PBU) method to prevent low cervical flexion would be helpful in performing pure CCF movement. Objects: The purpose of this study was to compare the effects of the CCF using D-PBU method and the traditional CCF method on the cross-sectional area (CSA) of the longus colli muscle (LCM) and the activity of SCM muscle in subjects with FHP. Methods: Twenty­four FHP subjects (male: 16, female: 8) were recruited for this study. All subjects performed CCF using two different methods: the traditional CCF method and the CCF using D-PBU method. The CSA of the LCM was measured via ultrasound, and surface electromyography was used to measure SCM muscle activity. Results: The change in CSA of the LCM was significantly larger during the CCF using D-PBU method ($1.28{\pm}.09$) compared with the traditional CCF method ($1.19{\pm}.08$) (p<.05). The SCM muscle activity using the CCF using D-PBU method ($2.01{\pm}1.97$ %MVIC) was significantly lower than when using the traditional CCF method ($2.79{\pm}2.32$ %MVIC) (p<.05). Conclusion: The CCF using D-PBU method can be recommended for increasing LCM activation and decreasing SCM muscle activity during CCF movement in subjects with FHP.