여대생의 근력 비대칭성의 특성

김창선 한국생활환경학회 2019 한국생활환경학회지 Vol.26 No.4

The characteristics of asymmetry in muscle strength of female college students are still unknown. This study aims to evaluate of characteristics of asymmetry in muscle strength. Both methods of isometric and isokinetic maximal muscle strengths of elbow and knee joints were measured in fortyfour female college students. In dominant/nondominant difference, isometric maximal muscle strength and isokinetic muscle endurance of dominant in the flexion of elbow joint were approximately 9% and 14% higher than those of the non-dominant, respectively(p<.05, p<.01), but there was no difference in the knee joints. The dominant/non-dominant ratio(DNDR) of isokinetic muscle endurance strengths in the elbow were approximately 1.2 times higher than those of isometric strengths. In flexion/extension difference, the isometric flexor strength were approximately 17% and 31% higher than those of the extensor strength in the elbow joint, respectively(p<.05, p<.01). In the knee joint, the flexor strengths of all measured muscle were consistently approximately 48~56% lower than those of the extensor strength. There was no significant difference between competition muscle strength ratio(CMSR) of each muscle strengths in the knee. These results suggested that differences of DNDR and CMSR among measured muscle strengths more appear in the elbow than in the knee joint.

신장이식 후 스테로이드 투여로 인한 근력 및 일상생활활동의 변화

안경주,최명애 서울대학교 간호대학 간호과학연구소 1997 간호학 논문집 Vol.11 No.2

The purpose of study was to explore the changes of muscle strength and activities of daily living(ADL) by steroid medication following the renal transplantation. The subjects for this study were 25 patients. Their average age was 38.6 years and their average dialysis duration was 20 months. Muscle strength-grip strength, flexor and extensor strength of hip and knee joint, flexor and inversor strength of ankle joint-and ADL were measured on 2 days prior to and on 12,16 weeks following the renal transplantation. Grip strength was determined by hand dynamometer(Lafayette Instrument, USA). The data were analyzed by percentages, mean standard deviation, repeated measure MANOVA and multiple regression analysis using the SPSSWIN program. The results were summarized as follows: 1. Mean steroid dose following the renal transplantation was loading dose(240mg/day) during the first week and was decreased to the maintenance dose(29.7-13.3mg/day) from the 4th week to the 16th week after the renal transplantation. 2. Knee extensor muscle strength decreased significantly at 12 weeks following the renal transplantation by steroid medication. No significant changes were observed in muscle strength except knee extensor muscle strength. Muscle strength and ADL at 12 weeks after the renal transplantation demonstrated to have a tendency to decrease compared with those of pre-renal transplantation. 3. Knee extensor muscle strength increased significantly at 16 weeks rather than at 12 weeks following th renal transplantation. No significant changes were observed i muscle strength except knee extensor muscle strength. Muscle strength and ADL at 16 weeks after the renal transplantation tended to increase compared with those of after the renal transplantation. 4. The changes of muscle strength and ADL after the renal transplantation were mostly influenced by muscle strength ADL of pre-renal transplantation rather than steroid medication following the renal transplantation. The results suggest that muscle strength and ADL at 12 weeks following the renal transplantation may decrease and those at 16 weeks may increase compared with those at 12 weeks following the renal transplantation.

Reference Respiratory Muscle Strength Values and a Prediction Equation Using Physical Functions for Pulmonary Rehabilitation in Korea

Park Tae Sung,Tak Young Jin,Ra Youngjin,Kim Jinmi,Han Sang Hun,Kim Sang Hun,Shin YongBeom,Shin Myung-Jun,Kang Jong Ho 대한의학회 2023 Journal of Korean medical science Vol.38 No.40

Background: In Korea, tests for evaluating respiratory muscle strength are based on other countries’ clinical experience or standards, which can lead to subjective evaluations. When evaluating respiratory function based on the standards of other countries, several variables, such as the race and cultures of different countries, make it difficult to apply these standards. The purpose of this study was to propose objective respiratory muscle strength standards and predicted values for healthy Korean adults based on age, height, weight, and muscle strength, by measuring maximal inspiratory pressure (MIP), maximal expiratory pressure (MEP), and peak cough flow (PCF). Methods: This cross-sectional study analyzed MIP, MEP, and PCF in 360 people, each group comprising 30 adult men and women aged 20–70, diagnosed as healthy after undergoing medical check-ups at a general hospital. Hand grip strength (HGS) and the five times sitto-stand test (FTSST) results were also recorded. Correlations among respiratory muscle strength, participant demographics, and overall muscle strength were evaluated using Pearson’s correlation analysis. The predicted values of respiratory muscle strength were calculated using multiple regression analysis. Results: Respiratory muscle strength differed from the values reported in studies from other countries. In the entire samples, both MIP and MEP had the highest correlations with peak HGS (r = 0.643, r = 0.693; P < 0.05), while PCF had the highest correlation with forced expiratory volume in 1 s (r = 0.753; P < 0.05). Age, body mass index, peak HGS, and FTSST results were independent variables affecting respiratory muscle strength. A predictive equation for respiratory muscle strength was developed using the multiple regression equation developed in this study. Conclusion: Respiratory muscle strength index may differ by country. For more accurate diagnoses, standard values for each country are required. This study presents reference values for Korea, and a formula for estimation is proposed when no respiratory muscle strength measurement equipment is available.

K지역 운동선수들의 운동 종목과 등속성 무릎 근력 수준이 등속성 최대토크각에 미치는 영향

이종백,박규민 한국코칭능력개발원 2023 코칭능력개발지 Vol.25 No.5

본 연구는 등속성 무릎 근기능 검사 중 최대토크각와 종목, 근력수준과의 관계를 분석하여 선수들의 훈련과 재활의 기초자료로 활용하는데 있다. K지역 13개의 운동종목 총 134명의 남자 일반(38명), 대학부(60명), 고등부(34명) 운동선수들을 대상으로 신체조성과 함께등속성 무릎근력과 근파워의 최대토크각을 평가하였다. 최대토크각은 종목과 근력수준별 상호작용, 근력과 근파워 상호관계를 분석하였다. 첫째, 운동종목과 근력수준은 등속성 무릎 최대토크각과 상호작용효과가 있었으며, 운동종목은 좌ㆍ우측 굽힘근과 폄근의 최대토크각과(p<.05), 근력수준은 우측 굽힘근의 최대토크각과 유의한 상호작용효과가 있었다(p<.05). 둘째, 좌ㆍ우측 등속성 굽힘근 최대근력토크각과 최대파워토크각은 등속성 굽힘근(p<.001)과 유의한 상호관계가 나타났으며, 우측 굽힘근 최대파워토크각의 경우 우측 굽힘근 근파워(p<.01), 좌측 폄근 최대근력토크각은 좌측 근력과 근파워 모두와(p<.05) 유의한 상호관계가 나타났다. 본 연구의 결과는 종목과 근력수준이 최대토크각에 일정부분 영향을 미치는 경향이 있었다. 이는 선수들의 종목특성에 따른 등속성 근력 평가에 있어서 최대토크각에 대한 고려가 필요하다는 것을 시사하며, 훈련평가와 부상 후 재활에 있어서 이러한 정보가 선수들의 경기력 향상에 도움이 될 수 있을 것으로 사료된다. The purpose of this study was to analyze the angle at peak torque during the isokinetic knee muscle function test and analyze the relationship between the event and muscle strength level to use as basic data for training and rehabilitation of athletes. A total of 134 male general (38), college (60), and high school (34) athletes from 13 events in K-region were evaluated for isokinetic knee strength and angle at peak torque angle of muscle power along with body composition. For the peak torque angle, the interaction by event and muscle strength level, and the correlation between muscle strength and muscle power were analyzed. First, exercise event and muscle strength level had an interaction effect on isokinetic knee maximum torque angle, exercise event was both left and right (p<.05), and muscle strength level only had a significant interaction effect on the right flexor muscle. (p<.05). Second, in the analysis of the correlation between isokinetic muscle strength, muscle power and maximum torque angle, the left and right isokinetic muscle strength torque angle and maximum power torque angle showed a significant correlation with the isokinetic flexor muscle (p<.001). In the case of the right flexor maximum power torque angle, the right flexor muscle power (p<.01), and the left extensor maximum muscle power torque angle showed a significant correlation with both left muscle strength and muscle power (p<.05). The results of this study tended to have a certain effect on the peak torque angle by the event and strength level. This suggests that it is necessary to consider the peak torque angle in the evaluation of isokinetic muscle strength according to the characteristics of athletes, and it is believed that this information can help improve athletes' performance in training evaluation and rehabilitation after injury.

A Study on the correlation between muscle strength and muscle activity on Shoulder motion of upper body

Jaesoo Hong,Joohyun Sim,Jonghyun Kim,Keyoungjin Chun 대한인간공학회 2011 대한인간공학회 학술대회논문집 Vol.2011 No.5

Objective: This study is aimed at estimating each muscle strength and EMG in flexion-extension and abduction-adduction motions while exercising the upper body and specifying the correlation between each agonist muscle activity and muscle strength. Method: Based on the previous studies, this research has selected the 10 upper- body muscles that are related to flexion-extension and abduction-adduction motions. Muscle strength and its activity have been measured during an experiment in synchronizing an Isokinetic dynamometer and an EMG. Pearson correlation coefficient has been used for an analysis about the correlation between the muscle strength and muscle activity. Results: 1. The agonists in flexion include: Upper Trapezius, Anterior deltoild, Middle deltoild, Biceps, Pectoralis major clavicular insertion. The agonists in extension include: Posterior deltoid, Tricep long, Infraspinatus, Latissimus Dorsi. The agonists in abduction include: : Upper Trapezius, Anterior deltoild, Middle deltoild, Biceps, Pectoralis major clavicular insertion. The agonists under adduction include: Tricep long, Pectoralis major sternal insertion, Latissimus Dorsi, Pectoralis major clavicular insertion. 2. The results of an analysis of correlation between muscle strength(Nm) and muscle activity(%MVC) in 4 motions(flexion, extension, abduction and adduction) were as follows: ① The result of flexion is significant correlation (acoefficient of correlation: 0.573**), ② The result of extension is weak correlation (0.387*), ③ The result of abduction is significant correlation (0.428*), ④ The result of adduction is significant correlation (0.693**). Conclusion: This research has analyzed the correlation between each agonist muscle activity and muscle strength in the four motions. The results between mean value of agonists' muscle activity and shoulder's muscle strength showed significant correlation but the correlation between each agonist and muscle strength was not showed.

한국 노인의 근력과 식사의 질에 대한 연구: 2014-2018년 국민건강영양조사 자료를 이용하여

김진아,이심열 한국가정과교육학회 2022 한국가정과교육학회지 Vol.34 No.1

This study evaluated the dietary habits and dietary quality of the Korean elderly according to muscle strength status. This study was conducted on the elderly aged over 65 years who participated in the 2014-2018 Korea National Health and Nutrition Examination Survey. Subjects were classified into the normal muscle strength group(n=2,000) and the low muscle strength group(n=1,273) according to the handgrip strength. There was a significant difference in general characteristics, diet habits, and health behavior according to the muscle strength status. The normal muscle strength group had a higher total score of KHEI and a subtotal score of 「adequacy」 items. But there was not significant difference in the 「moderation」 items. For the 「balance of energy intake」 items, the normal muscle strength group had a higher subtotal score than the low muscle strength group only in among women. The prevalence of low muscle strength decreased in the highest quartile of the adjusted KHEI total score(p for trend=0.08). As a result of this study, it was found that KHEI was significantly associated with muscle strength. This study result can be used to provide dietary guidelines for the improvement of muscle strength in the elderly based on each item of KHEI and sex. 본 연구에서는 우리나라 65세 이상 노인을 대상으로 근력정상군과 저하군으로 분류하여 식행동 및 식사의 질과 근력간의 관련성을 비교 분석하였다. 근력저하군은 근력정상군에 비해 학력수준과 소득수준, 취업자 비율이 낮고, 혼자서 거주하는 비율이 높았다. 근력저하군은 정상군에 비해 상대적으로 식이보충제 섭취율과 영양표시 인식율이 낮으며, 활동의 제한율이 높고, 신체활동율이 낮았다. KHEI를 이용하여 식사의 질을 비교한 결과 남녀 모두 근력정상군이 근력저하군에 비해KHEI 총점이 높았다. 영역별로「적정성」영역총점은 근력정상군에서 근력저하군보다 높은 점수를 보인 반면, 「절제」영역에서는 군별 차이가 없었고,「에너지 섭취의 균형」영역총점은 여성의 경우에만 근력정상군의 점수가 근력저하군보다 높아성별 차이를 보였다. 또한 KHEI 점수가 높을수록 근감소증 발생위험률이 감소하였다. 따라서 본 연구는 노년기의 올바른식생활 관리와 근력 감소 예방을 위한 영양교육의 기초자료를 마련하는데 유용한 정보로 활용될 수 있을 것으로 기대된다.

호흡근 강화운동이 20대 남성의 최대호기량과 호흡근 근력 변화에 미치는 영향

이현철,이삼철 대한운동사협회 2011 아시아 운동학 학술지 Vol.13 No.4

[서론] 본 연구의 목적은 호흡근 강화운동을 통하여 20대 남성들의 최대호기량과 근력변화에 미치는 영향을 알아보고, 호흡근강화 운동이 호흡계 질환을 예방하거나 완화시키는데 어떠한 역할을 할 것인가에 대해 알아보고자 한다. [방법] 20세 이상 성인을 대상으로 흡연자와 비흡연자 각각 10명을 대상으로 설정하고, 8주간의 호흡근 강화운동을 실시하였다. 최대호기량 변화는 Peak Flow Meter 장비를 이용하여 측정하였고, 호흡근 근력변화는 배근력계 장비를 활용하였다. 변인들간의 평균치(M)와 표준편차를 산출하고 흡연군과 비흡연군의 그룹별최대 호기량과 근력의 호흡근운동의 전․후차이 간의 유의미성을 분석하기 위해 t-test를 실시하였고, 운동전·후의 각 그룹간의 차이에 대한 유의성 검진을 위해 ANOVA를 실시하였다. [결과] 호흡근 강화운동으로 인한 운동전·후의 흡연군과 비흡연군의 그룹별 최대호기량, 배근력의 영향에 미치는 결과는 점차 증가하는 결과를 나타낸 유의한 차이가 나타났지만(p<0.05), 호흡근 강화운동으로 인한 운동 전·후의 흡연군과 비흡연군의 그룹간 최대호기량, 배근력의 효과검정 결과는 유의한 차이가 나타나지 않았다(p<0.05). [결론] 호흡근 강화운동이 최대호기량, 호흡근 근력의 증가를 가져옴으로써 호흡능력 향상에 효과가 있는 것을 알 수 있었으며 이러한 결과는 향후 호흡근력 약화를 회복시키거나 지연시켜 호흡 기능을 증가시켜 호흡계질환 예방과 완화에 도움이 될 것으로 사료된다. [INTRODUCTION] The purpose of this study was to examine the effects of the respiratory muscle exercises on change of peak expiratory flow and the respiratory muscle strength according to respiratory muscle exercises and to provide evidence for performance enhancement in respiratory failure and prevention. [METHOD] Twenty young healthy men for this study (10 men each in smoker and non-smoker group) and all they were over 20 years old with communicating and exercising independently. They performed respiratory muscle exercises 3 times a week for eight weeks. Peak flow meter was used for measuring peak expiratory flow, Backmuscle dynamometer was used for measuring Respiratory muscle strength . All data were analyzed by t-test, ANCOVA using SPSSWIN 18.0. P-values of <0.05 were considered significant. [RESULT] In the case of smoking group , there were significant differences , from peak expiratory flow and Back-muscle strength between the before and the after of respiratory muscle strength exercises. In the case of nonsmoking group , there were significant differences , from peak expiratory flow and Back-muscle strength between the before and the after of respiratory muscle strength exercises. [CONCLUSION] Respiratory muscle strength exercises improved peak expiratory flow and respiratory muscle strength. These results might be a application in respiratory prevention and enhancement.

테이핑 적용방법에 따른 근긴장도, 근경직도, 악력의 변화

조용호,박성욱 동방문화대학원대학교 자연치유연구소 2018 자연치유연구 Vol.3 No.1

The purpose of this study was to investigate the changes of muscle tone, muscle stiffness and grip strength according to taping application method. The subjects of this study were 30 normal adult subjects and measured the variables by non stretched taping and stretched taping. Muscle tone and stiffness were measured using Myoton pro equipment and grip strength was measured using a dynamometer. In the same position, subjects were measured three times. And the average value of three times was used. For the comparison of muscle tone, muscle stiffness and grip strength according to taping application, we used paired t test. An independent test was conducted to examine differences between groups before and after intervention. The results of this study showed that both the non-stretched taping and stretched taping applications showed statistically significant decreasing in muscle tone and muscle stiffness in both groups, and the grip strength was statistically significant increasing in both groups. There was no significant difference between the groups in terms of muscle tone, muscle stiffness, and grip strength before intervention. In after the intervention, there was no statistically significant difference between the groups in muscle tone and muscle stiffness. But there was a statistically significant difference between the two groups in grip strength. And the stretched taping group showed higher values. Because there are differences in muscle tone, muscle stiffness, and grip strength according to taping application method, the effect of muscle can be expected if taping method is applied well.

Reliability and Validity of a Cervical Muscle Strength Test using a Load-cell-type Strength Measurement Sensor

Jeong-Hoon Lee,Jong-Gil Seo,Byeong-Jin Kim,Jae-Seop Oh 한국임상움직임치료학회 2021 한국임상움직임치료학회지 Vol.1 No.2

Background : Cervical disorder is caused by abnormal cervical movement patterns and cervical muscle imbalance, which are interrelated and result in neck pain and forward head position. In individuals with postural problems, measuring cervical muscle strength allows quantitative assessment of musculoskeletal damage and the effects of neck pain. Various devices have been used to measure cervical muscle strength. However, no studies have assessed cervical muscle strength using a load cell capable of measuring muscle strength in various postures and acquiring biofeedback in real time. Objectives : To evaluate the reliability and validity of a device designed to measure cervical muscle strength in the craniocervical and cervicothoracic regions using a load cell device fixed to a support plate. Methods : The participants were 15 individuals with neck pain. Superficial cervical muscle strength in cervicothoracic flexion (CTF) and cervicothoracic extension (CTE), as well as deep cervical muscle strength in craniocervical flexion (CCF) and craniocervical extension (CCE), were measured using an Hand-held dynamometer (HHD) and fixed-base isometric (load cell) dynamometry. The reliability and validity of the outcome measures using the two devices (HHD and load cell) in four positions were analyzed using intra-class coefficient (ICC) models 3 and 2. Results : Load cell measurements showed excellent intra-rater and inter-rater reliability. HHD measurements exhibited excellent intra-rater and inter-rater reliability. The load cell and HHD measurements showed moderate to excellent validity. Conclusions : The findings revealed excellent validity and reliability of load cell and HHD measurements of muscle strength. Thus, the load cell device can be used as an effective tool for assessing cervical strength. Also, the load cell can express muscle strength in Kilogramme rather than Newton. Therefore, the load cell can be used to measure muscle strength more easily than HHD.

Relationship Between Respiratory Muscle Strength and Conventional Sarcopenic Indices in Young Adults: A Preliminary Study

노희준,김돈규,이상윤,서경묵,강시현,서훈창 대한재활의학회 2015 Annals of Rehabilitation Medicine Vol.39 No.6

Objective To investigate the relationships between respiratory muscle strength and conventional sarcopenic indices such as skeletal muscle mass and limb muscle strength. Methods Eighty-nine young adult volunteers who had no history of medical or musculoskeletal disease were enrolled. Skeletal muscle mass was measured by bioelectrical impedance analysis and expressed as a skeletal muscle mass index (SMI). Upper and lower limb muscle strength were evaluated by hand grip strength (HGS) and isometric knee extensor muscle strength, respectively. Peak expiratory flow (PEF), maximal inspiratory pressure (MIP), and maximal expiratory pressure (MEP) were evaluated using a spirometer to demonstrate respiratory muscle strength. The relationships between respiratory muscle strength and sarcopenic indices were investigated using Pearson correlation coefficients and multiple linear regression analysis adjusted by age, height, and body mass index. Results MIP showed positive correlations with SMI (r=0.457 in men, r=0.646 in women; both p<0.01). MIP also correlated with knee extensor strength (p<0.01 in both sexes) and HGS (p<0.05 in men, p<0.01 in women). However, PEF and MEP had no significant correlations with these sarcopenic variables. In multivariate regression analysis, MIP was the only independent factor related to SMI (p<0.01). Conclusion Among the respiratory muscle strength variables, MIP was the only value associated with skeletal muscle mass.