렛 풀 다운 운동 시 그립너비와 그립방향이 상지의 근육활성도에 미치는 영향

이용로 ( Yongro Lee ),임비오 ( Bee-oh Lim ) 한국스포츠정책과학원(구 한국스포츠개발원) 2017 체육과학연구 Vol.28 No.3

[목적] 본 연구는 렛 풀 다운 운동 시, 그립너비(어깨 넓이의 50%, 100%, 150%)와 그립방향(회내 그립, 회외 그립)이 8가지 상지 근육(넓은등근, 큰가슴근, 가시아래근, 위팔두갈래근, 위팔세갈래근, 배곧은근, 척추 세움근, 중간등세모근)에 미치는 영향을 규명하는 것이다. [방법] 본 연구의 목적을 달성하기 위하여 12개월 이상 웨이트트레이닝을 경험한 S시 소재의 C대학교에 재학 중인 신체 건강한 20대 남자대학생 8명을 선정하였다. 연구대상자들은 6가지 그립 방법(회내 50%, 회내 100%, 회내 150%, 회외 50%, 회외 100%, 회외 150%)을 무작위로 선택하여 1RM의 70% 무게를 이용하여 5회 반복 시도하였다. 각 근육의 그립너비와 그립 방향(3×2)에 따른 차이 검증을 위해 반복측정 이원분산분석을 활용하였고, 사후 검정은 Tukey을 실시하였다. [결과] 넓은등근의 근 활성도에서 그립너비 50%에 비해 100%에서 유의하게 더 크게 나타났다. 큰가슴근과 배곧은근의 근 활성도에서 그립너비 50%는 150%에 비해, 100%는 150%에 비해 유의하게 더 크게 나타났다. 중간등세모근의 근 활성도에서 그립너비 50%에 비해 150%에서 유의하게 더 크게 나타났다. [결론] 렛 풀 다운 운동 시 몸통의 뒤쪽에 위치하고 있는 넓은등근과 중간등세모근은 그립너비를 넓게 잡았을 때 근활성도가 더 높게 나타났고, 몸통의 앞쪽에 위치하고 있는 큰가슴근과 배곧은근은 그립을 좁게 잡았을 때 근활성도가 더 높게 나타났다. [Purpose] The purpose of this study is to investigate the effects of grip width and hand orientation on muscle activities of upper body during the lat pull-down. [Methods] Eight healthy men performed the 6 grip variations (3 grip width × 2 hand orientation) using an experimentally determined load of 70% of 1 repetition maximum. Five trials were analyzed for each grip type. Participants maintained a cadence of 2-second concentric and 2-second eccentric phases. The grip widths were normalized for each individual by using their biacromial diameter (100%), and then set the grip width 50% of biacromial diameter and 150% of biacromial diameter. Surface EMG of the latissimus dorsi, pectoralis major, infraspinatus, biceps brachii, triceps brachii, rectus abdominis, erector spinae and middle trapezius was recorded, and the root mean square of the EMG was normalized, using a maximum isometric voluntary contraction. [Results] Latissimus dorsi showed higher muscle activities in 100% grip width than those of 50% grip width. Pectoralis major and rectus abdominis showed higher muscle activities in 50% and 100% grip width than those of 150% grip width. Middle trapezius showed higher muscle activities in 150% grip width than those of 50% grip width. [Conclusions] Two-way repeated measures ANOVA for each muscle revealed that latissimus dorsi and middle trapezius (the posterior muscles of trunk) showed higher muscle activities in wide grip, on the other hand, pectoralis major and rectus abdominis (the posterior muscles of trunk) showed higher muscle activities in narrow grip.

카약 스프린트 종목에서 패들 그립너비가 카약 전방 스트로크 동작과 보트 안정성에 미치는 영향

이종훈(Lee, Chong-Hoon),남기정(Nam, Ki-Jung),박용현(Park, Yong-Hyun) 한국체육과학회 2013 한국체육과학회지 Vol.22 No.3

The purpose of this study was to identify the contribution that paddle grip width has to successful performance during the forward stroke movement pattern, and boat stability in kayak sprinting. Eight male elite kayak athletes participated in this study. Kayak athletes performed kayak sprinting with three grip width conditions (preferred grip(PGW); narrow grip(NG); wide grip(WG)) while stroke frequency, paddling distance, knee joint ROM and angular velocity, trunk rotation ROM, boat stability, integrated EMG(rectus femoris: RF, biceps femoris:BF) were measured and analyzed. The results showed that kayak performance with preferred grip width condition is better than others. For the wide grip width, rotation of trunk is larger and iEMG of Biceps femoris. However, the boat stability was affected negatively. There were no overall significant differences, but some conditions were significant differences in Bonferroni’s post hoc test. Wide grip width helps make more rotation of trunk and more iEMG value of BF, but no good performance because of large ROM of boat roll angle. Large ROM of boat roll can be was a main factor reducing kayak velocity. The improvement of paddling technique to minimize ROM of rolling angle is needed for kayak athletes to use a wide grip width.

인클라인 벤치프레스에서 그립 넓이가 주동근의 근피로에 미치는 영향

이희혁(Hee Hyuk Lee) 한국사회체육학회 2014 한국사회체육학회지 Vol.0 No.57

The myoelectric signal of the sternoclavicular and clavicular portions of the pectoralis major, the anterior deltoid, and the triceps brachii of 7 healthy men was collected during an incline bench press with different grip widths. Grip width(narrow, mid, and wide) was varied to determine how these factors influence muscle fatigue(median frequency, MF) during the incline bench press. A wide grip resulted in increased muscle fatigue for the anterior deltoid and the clavicular portion of the pectoralis major. And, moving from wide to narrower grip widths increased triceps fatigue. The muscle fatigue in sternoclavicular portion of the pectoralis major not occurred irrespective of the grip widths. Considering the changes that occur during changes in grip width, the choice of grip position should be determined by the attempts to train specific muscle groups.

취학 전ㆍ후 정상 아동의 장악력과 손가락 쥐는 힘에 대한 표준화 연구

오혜원,박은숙,박창일,신지철 대한작업치료학회 2000 대한작업치료학회지 Vol.8 No.1

The purpose of this study is to find the standard value of hand width, of grip strength and of pinch strength by age, sex, and by left hand and right hand and also to find how the general characteristics influences grip strength and pinch strength. Martin Vigorimeter (List No. 17-27-01) was used for measuring grip strength, and the pinch gauge (0∼30 lbs) of B&L engineering for measuring pinch strength. The subjects of this study are the children at the age of three to seven years, who attending the babies' play room, kindergarten and the primary school in Seoul and the Kyungki province area. They all were normally developed without any significant neurology problem. wo hundred girls and two hundred boys were partifipated in this study. They were divided into ten subgroups according to the age of six month interval. Each group consisted of forty children of twenty boys and twenty girls. Analysis of data presents the technical statistics upon the hand width of right and left hand and the grip strength and pinch strength according to the age and sex. Multiple regression analysis using mixed liner model was operated in order to find how the general characteristics (of the age, sex, and side of hand) influence hand width, grip strength, and pinch strength individually. Also, we calculated the correlation among hand width, grip strength and pinch strength under the condition of controlling general characteristics; and to find correlation between the right hand and the left hand of the age and sex, we carried out paired t-test and came to the conclusion as follows: 1. Hand width is significantly increased with the increase of age (p<0.01). The increase of hand width according to age, boy is wider than that of girl significantly (p<0.01), and the right hand is wider than that of the left hand significantly (p<0.01). 2. Grip strength is significantly increased as the age and hand width increased (p<0.01). The increase of grip strength according to the age, boy is stronger than that of girl significantly (p<0.01), and grip strength of the right hand is stronger than that of the left hand(p<0.01). 3. Three-jaw pinch strength is increased as the age, hand width and grip strength are increased(p<0.01). But there is no significant difference of three-jaw pinch strength according to sex and the side of hand(p>0.05). 4. Tip pinch strength is significantly increased as the age and grip strength are increased(p<0.05). The increase of tip pinch strength according to the age, boy is stronger than that of girl significantly (p<0.05), but there is no significant difference between the right hand and the left hand(p>0.05). 5. Lateral pinch strength is significantly increased as the age and grip strength are increased(p<0.01). But the increase of lateral pinch strength, there is no significant difference according to the hand width, sex and the side of hand(p>0.05). 6. The test of correlation among hand width, grip strength and pinch strength showed the correlation between grip strength and pinch strength was stronger than the correlation between hand width and pinch strength(0.3<r<0.7). There was strong correlation between each pinch strength(0.3<r<0.7). Above all, the correlation of three-jaw pinch strength and tip pinch strength was strongest(0.7<r<1.0). 7. The test of hand width according to the age and sex, and the difference between the right hand and the left hand in grip strength and pinch strength showed that there was significant difference against all the test of hand width, of grip strength, and of pinch strength in the age group from seven years and six months to seven years and eleven months than the age group under six years, specially in girls group(p<0.05).

턱걸이, 팔굽혀펴기, 랫 풀다운 운동 시 잡는 방법과 넓이에 따른 넓은 등근의 근 활성도 비교

이수현,김주오,김근조,Lee, Su-Hyun,Kim, Ju-O,Kim, Keun-Jo 대한물리치료과학회 2018 대한물리치료과학회지 Vol.25 No.2

Purpose: The purpose of this study was to investigate the most effective exercise position of Latissimus dorsi's activities during Pull up, Push up and Lat pull down among few positions of hand grips(pronation, Supination and neutral grip) and grip widths(30cm, 60cm) based on EMG activities. Method: 10 healthy adults were participated in this study and the surface EMG activities of the Latissimus dorsi were measured during Pull up, Push up and Lat pull down exercise according to specific hand grip and grip width positions. The maximum and mean value of Latissimus dorsi's EMG activities at all positions were recorded and analysed by ONE-WAY REAPTED ANOVA. Results: The showed that the most Latissimus dorsi's activities is during Pull up exercise. Main results are as follows 1)maximum value: For Pull up, among all studied positions, Rt Latissumus dorsi, position of Supinated grip and 60cm grip width showed strongest muscle activation based on maximum EMG value. Statistical significance was assumed at p<.05. 2)mean value: For Pull up, among all studied positions, Both Latissimus dorsi, position of pronated grip and 60cm grip width showed strongest muscle activation based on mean EMG value. Statistical significance was assumed at p<.05. Conclusion: Therefore, taking the results of this study, Pull up exercise would be the best exercise of Latissimus dorsi's activation. It is recommended to do in pronated grip position and 60cm grip width during Pull up to make body fit.

파지조절 가능한 인간공학 전지가위가 악력과 손가락들의 피로도에 미치는 영향

허진강(Her Jin-Gang) 대한치료과학회 2019 대한치료과학회지 Vol.10 No.2

Objective: We developed an ergonomic pruning shears that allows the user to freely adjust the width of the grip and conducted this study to examine the effects of the pruning shears on grip strength and the fatigue of the fingers. Method: The maximum grip strength was first measured with an digital dynamometer, and the maximum grip strength was measured again after the subjects repeated scissoring 100 times using general pruning shears or ergonomic pruning shears. Borg s CR-10 scale was used to measure subjective fatigue after using the two pruning shears. Results: When the grip strength values after using the two pruning shears were compared with each other the mean grip strength after using ergonomic pruning shears was 27.69 kg, which was higher than that after using general pruning shears, 25.73 kg (p<.05). The subjective fatigue when the two pruning shears were used was shown to be 3.6 points for general pruning shears and 1.73 points for ergonomic pruning shears (p<.05). Conclusion: After repeating scissoring 100 times, the fatigue of the fingers was lower when ergonomic pruning shears were used than when general pruning shears were used and grip strength was higher when ergonomic pruning shears were used than when general pruning shears were used.

파지조절 가능한 인간공학 전지가위가악력과 손가락들의 피로도에 미치는 영향허진강1 1한림성심대학교

허진강 대한치료과학회 2018 대한치료과학회지 Vol.10 No.2

Objective: We developed an ergonomic pruning shears that allows the user to freely adjust the width of the grip and conducted this study to examine the effects of the pruning shears on grip strength and the fatigue of the fingers. Method: The maximum grip strength was first measured with an digital dynamometer, and the maximum grip strength was measured again after the subjects repeated scissoring 100 times using general pruning shears or ergonomic pruning shears. Borg's CR-10 scale was used to measure subjective fatigue after using the two pruning shears. Results: When the grip strength values after using the two pruning shears were compared with each other the mean grip strength after using ergonomic pruning shears was 27.69 kg, which was higher than that after using general pruning shears, 25.73 kg (p<.05). The subjective fatigue when the two pruning shears were used was shown to be 3.6 points for general pruning shears and 1.73 points for ergonomic pruning shears (p<.05). Conclusion: After repeating scissoring 100 times, the fatigue of the fingers was lower when ergonomic pruning shears were used than when general pruning shears were used and grip strength was higher when ergonomic pruning shears were used than when general pruning shears were used.

손기능과 손의 특성과의 관계

이선명,Lee, Sun-Myung 한국임상보건과학회 2015 한국임상보건과학회지 Vol.3 No.3

Purpose. This study was to investigate the relationship between hand function and characteristics of hand. Methods. Participants were 56 occupational therapy students who studied in M colleges in Gyengsangnam-do, april 20, 2015 from 1 May, and hand circumference and length (vertical, w), the width was measured. A hand grip on the measurement subject was measured by the Grip dynamometer and Pinch gauge. Results. The results was hand length, width, circumference long, broad, thick, and hand strength was a greater correlation emerged. Grip strength was showed a significant correlation to the size and grip strength was also correlated. Conclusion. This study was correlation of length of the hand, a length wide and strength of the finger circumference.

랫풀다운 운동 시 엎침 그립너비가 최대근력, 상체 기울기 및 근육 활동에 미치는 영향

김종빈,한기훈 한국체육대학교 체육과학연구소 2022 스포츠사이언스 Vol.40 No.1

목적: lat pulldown 운동은 상체의 근육을 키우는 중요한 트레이닝 중 하나이며, 본 연구의 목적은 lat pulldown 시 엎침 그립 폭에 따른 넓은 등근, 뒤어깨세모근, 윗팔두갈래근에 대한 변화를 알아보는 것이다. 방법 : 20대 성인남성 16명(나이: 25.0 ± 2.66 yrs, 신장: 1.76 ± 4.07m, 체중: 75.7 ± 7.89kg)에게 엎침 그립 너비(50%, 100%, 150%)시 최대근력, 상체기울기, 근 활성도(넓은 등근, 뒤어깨세모근, 윗팔두갈래근)의 차이를 일원 분산 분석(one-way ANOVA)으로 비교하였으며, 유의 수준은 α < .05로 분석하였다. 결과: 엎침 그립 너비가 넓은 경우 좁은 그립보다 1RM, 상체 기울기 및 근육 활성이 더 크게 나타났으며(p<.05), 넓은 등근은 150%에서 근 활성도가 더 크게 나타났다. 좌우 근육대칭지수에서는 50%그립에서 작게 나타났다. 결론: lat pulldown 운동 시 엎침 그립 너비를 150%로 운동하는 것이 넓은 등근에 근육을 발달시킬 수 있으며, 어깨 근력 향상을 위해서는 50%와 100%로 수행하는 것을 권장한다. 향후 연구에서는 lat pulldown 운동 시 동조근에 대한 연구를 계속할 것을 제안한다.

랫풀다운 운동방법에 따른 넓은등근, 큰가슴근, 어깨세모근, 등세모근, 위팔두갈래근의 근전도 분석

임승길 대한운동학회 2017 아시아 운동학 학술지 Vol.19 No.1

[PURPOSE] This study investigated the differences in activation of muscles principally recruited in the front lat pull down (FLPD) exercise and in the behind the neck lat pull down (BLPD) exercise; by doing so we aimed to propose a safe and effective mode of exercise. [METHODS] The study subjects consisted of 12 healthy male individuals in their 20s, who had neither medical problems nor physical restrictions. The one repetition maximum (1RM) of the lat pull down of each participant was indirectly measured using a weight of less than 10 RMs. The patients were asked to perform 5 consecutive repeats of FLPD and of BLPD, using a weight of 75% of their 1RM; whilst the participants performed these exercises, we measured muscle activation by electromyography. Using the resulting electromyographic data, which were filtered of electromyogram artifacts, we calculated the root mean squares (RMS). With respect to a standard RMS, which was calculated using the maximum voluntary isometric contraction test, we analyzed the RMS of FLPD and BLPD and expressed them as percentages. The paired T-test was used to statistically analyze the differences in muscle activation between FLPD and BLPD. [RESULTS] We found that the posterior deltoid muscle was significantly activated during the FLPD exercise (p<.01), whereas the lower trapezius muscle was significantly activated during the BLPD exercise (p<.05). However, we did not observe any statistically significant differences in muscle activation between the two lat pull down exercises in the latissimus dorsi, the pectoralis major, the upper trapezius, the middle trapezius, and the biceps brachii muscles. [CONCLUSIONS] Considering both safety and effectiveness, we propose that individuals with shoulder injuries perform the FLPD exercise over the BLPD exercise during rehabilitation