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PNF기법을 이용한 스트레칭이 관절가동범위와 고유수용감각에 미치는 영향
이윤균,김진성,조미화,박창준,강현주 순천향대학교 기초과학연구소 2016 순천향자연과학연구 논문집 Vol.22 No.2
The purpose of this study was to investigate the effects of proprioceptive neuromuscular facilitation (PNF) stretching techniques on range of motions of four different joints and static/dynamic balance. A total of 10 male participants(age = 21.7 ± 2.2 yrs; height = 173.7 ± 3.4 cm; mass = 66.3 ± 5.6 kg; BMI = 22.3 ± 1.8 kg/m2) were recruited for the study on a voluntary basis. Prior to participation in the study, the purpose of the study and test procedures were carefully explained to participants. Participants made 3 visits per week, every other day for 6 weeks to perform the PNF stretching training. Each training session was a 60-minute in duration. The shoulder flexion/extension, hip flexion/extension/internal rotation/external rotation, knee flexion/extension and ankle dorsiflexion/plantar flexion’s range of motions(ROMs), and a static single-legged stance on a flat ground and Y-balance were measure before and after 6 weeks of PNF stretching training. A GemRed goniometer device was used during measurement. We found that shoulder extension, hip extension and knee extension were favorably increased. There was no difference at ankle joint’s ROM. The findings of the study suggest that future investigation and application of changing in the frequency, intensity and duration of the designed PNF stretching can provide to find an optimal PNF stretch training techniques.
이윤균,장선호,김민수,김우년,윤호규,박상도,김성택,이종두 한국고분자학회 2010 Macromolecular Research Vol.18 No.3
The electrical, morphological and rheological properties of melt- and dry-mixed composites of polypropylene (PP)/nickel-coated carbon fiber (NCCF) with multi-walled carbon nanotubes (MWCNTs) was investigated. Melt mixed PP/NCCF/MWCNT composites were prepared by mixing the materials with a twin screw extruder. From the results of the electrical conductivity of the PP/NCCF/MWCNT composites, the MWCNTs increased the electric conductivity of the PP/NCCF composites appreciably. A higher aspect ratio of MWCNTs can increase the conductivity of PP/NCCF composites in a polymer matrix compared to the composites without the MWCNTs. The tensile and flexural strengths of the PP/NCCF/MWCNT composites were higher than the composites without MWCNTs. This is might be due to the reinforcing effect of the well dispersed MWCNT in the PP matrix. The results of electrical, morphological and mechanical studies indicate that the MWCNTs increased the electrical conductivity and mechanical strength of the PP/NCCF composites.