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스미스 머신을 이용한 스쿼트 동작의 근전도 데이터와 근골격 해석 시스템의 시뮬레이션 결과 데이터 비교
이해린(Haerin Lee),김혜리(Hyeri Kim),Gizem Ozkaya,정문기(Moonki Jung),이기광(Kikwang Lee),이상헌(Sanghun Lee) (사)한국CDE학회 2014 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2014 No.8
Squat is typical weight training. Especially, this exercise enhances muscle of lower body. The purpose of this paper is verification of a musculoskeletal simulation system, AnyBody. The method is comparing the EMG data and the inverse dynamics results on muscle activity. For comparison, we captured EMG signals during squat with a smith machine. We selected five muscles of the right leg (the rectus femoris, vastus medialis, vastus laterlis, biceps femoris, and gastrocnemius), one muscle of the lower back (the erector spine). Next, we built a simulation model using motion capture data (C3D) for squat, and obtained the human model’s muscle activity by calculating inverse dynamics. The analysis results showed that the muscle activity represented by the EMG data and the simulation results have similar patterns. In addition, we synthesized another squat motion without using C3D data. This model was also applied to the inverse dynamics analysis for muscle activity and its results were compared to the EMG data, with which the results of the simulation appeared to be similar.
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김민관(Min Kwan Kim),이정우(Jungwoo Lee),김영명(Young Myung Kim),이기광(Kikwang Lee),한창희(Chang Hee Han) 한국데이타베이스학회 2016 Journal of information technology applications & m Vol.23 No.2
Recently, 3D printing technology has been considered as a core applicable technology because it brings many improvements such as the development of medical technology, medical customization, and reducing production cost and shortening treatment period. This research suggests a market prediction framework for medical 3D printing business. As an immature market situation, it is important to control some uncertainty for market prediction such as a customers’ conversion rate. So we adopt decision making tree (DMT) model which used to choose an optimal decision making among diverse pathway. Among medical industries this paper just focuses on dentistry business. For predicting a 5 year period trend expected market size, we identified some replaceable denture procedure by 3D printing, collected related data, controlled uncertain variables. The result shows that medical 3D printing business could be a market of 28.2 billion won at 1st year and in the end of fifth year it could become on a scale of 61.1 billion won market.
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김창선 ( Changsun Kim ),( Zhou Yuezhu ),박동호 ( Dong-ho Park ),김기훈 ( Kihoon Kim ),정왕수 ( Wangsoo Jeong ),김혜리 ( Hye-ree Kim ),이기광 ( Kikwang Lee ),민석기 ( Seok-ki Min ) 한국스포츠정책과학원(구 한국스포츠개발원) 2021 체육과학연구 Vol.32 No.1
〔목적〕 양궁종목에서 근전도를 이용한 운동학적 연구는 증가했지만, 우리나라 전통 활쏘기인 국궁 관련 연구는 전무한 실정이다. 본 연구의 목적은 국궁 궁사를 대상으로 활쏘기 동작중의 근전도를 평가하는 것이다. 〔방법〕 대상자는 국궁 궁사 10명으로 활쏘기 자세에 따라 마주 서기 그룹(PSG, n=5)과 사선 서기 그룹(OSG, n=5)의 두 집단으로 구분하였다. 근전도는 준비(Set), 거궁(Set up), 만작(Full draw), 발시(Release), 마치기(Ending) 등 5개 동작의 활쏘기 국면에서 12개의 근육에서 근전도를 측정했다. 〔결과〕 만작 및 발시 시의 뒤어 깨세모근, 등세모근, 큰마름근, 깍지팔의 넓은등근, 위팔두갈래근, 아래팔폄근무리, 위팔세갈래근, 어깨올림근의 근활성은 유의하게 증가하였다가, 마치기 국면에서는 다시 감소했다(p<.01, p<.001). 또한, 척주세움근의 근활성은 만작 및 발시 시 증가(p<.01, p<.001)한 반면, 배곧은근, 넓다리곧은근, 큰볼기근에 있어서는 유의한 변화는 없었다. 마주 서기 집단과 사선 서기 집단을 비교한 결과, 사선 서기 집단의 넓다리곧은근 근활성은 마주 서기 집단의 발시(p<.05) 국면 보다 높았고, 마치기 국면까지 유지되었다(p<.05). 한편, 활의 장력이 높아질수록 발시 시에 깍지 팔의 위팔두갈래근 근활성이 높아졌다(p<.05). 〔결론〕 국궁 활쏘기 시 복부, 다리, 엉덩이 근육보다 양팔과 등 근육이 더 활성화된다는 것이 시사되었다. 또한, 마주 서기 자세시에 상체를 비틀기 위해 하지의 근활성이 억제될 가능성이 있으며, 활의 장력이 높을수록 깍지 팔의 위팔두갈래근 근력 증가가 필요할 것으로 판단된다. [Abstract] The past few decades has seen increasing kinematic studies using surface electoromyography (EMG) in archery, however there has been no such specific study in Korean traditional archery. The purpose of this study was to evaluate EMGs during archery shooting motion in Korean traditional archers. Ten men Korean traditional archers were participated, and divided into two groups according to the shooting stance; parallel stance group(PSG, n=5) and oblique stance group(OSG, n=5). The surface EMGs were measured 12 muscles during shooting motion of five events including Junbi(Set), Geogung(Set up), Manjak(Full draw), Balsi(Release), Machigi(Ending). At the result, muscle activity of posterior deltoid, trapezius, rhomboid major, latissimus dorsi, biceps brachii, forearm extensor bundle, triceps brachii, levator scapulae significantly increased at event of full draw and release, then significantly decreased again at event of ending, respectively(p<.01, p<.001). The muscle activity of erector spinae(ES) was also significantly increased at event of full draw and release(p<.01, p<.001), while no significant changes in muscles of rectus abdominis, rectus femoris(RF), gluteus maximus. As a result of comparing PSG and OSG, muscle activity of RF in OSG was higher than PSG at event of release(p<.05), it remained until event of ending(p<.05). On the other hand, the higher the tension of the bow, the higher the muscle activity of the draw arm at event of release(p<.05). These results suggest that when Korean traditional archery shooting, both side arm and back muscles are more activated than the abdomen, leg and hip muscles. The parallel stance might suppress the muscle activity of the lower extremities to twist the upper body. And the higher bowstring tension needs to increase of muscle strength in BB of draw arm.
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