• 한국축산식품학회지
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• 제37권5호
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• pp.716-725
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• 2017

The objective of this study was to determine the relationship between composition of muscle fiber types and meat quality traits of eight major muscles from Hanwoo steers. Longissimus lumborum (LL), psoas major (PM), semimembranosus (SM), semitendinosus (ST), gluteus medius (GM), triceps brachii (TB), rectus abdominis (RA) and superficialis flexor (SF) muscles were obtained from 9 Hanwoo steers and subjected to histochemical analysis. There were significant (p<0.05) differences in fiber number percentage (FNP) and fiber area percentage (FAP) of fiber types among these 8 major muscles. SF had the highest FNP of type I (55.9%), followed by PM (46.4%), TB (45.4%), RA (38.5%), LD (36.8%), GM (36.0%), SM (22.2%), and ST (18.8%). FAP of type IIB ranged from 9.9% in SF to 58.7% in ST. Meat quality traits, including fat content, myoglobin content, collagen content, CIE $L^*$ and $a^*$, drip and cooking loss, sarcomere length and Warner-Bratzler shear force, were all significantly (p<0.05) different among these muscles. Due to such diversities among these 8 muscles, lack of correlations were found between fiber type composition and meat quality traits. These results suggest that correlation for each individual muscle should be used to improve meat quality and profitability of retail beef cuts.

• 근관절건강학회지
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• 제19권2호
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• pp.210-222
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• 2012

Purpose: This study examined the effects of taekwondo exercise program on the physical function, fitness and quality of life in women with osteoarthritis. Methods: With nonequivalent control group quasi-experimental design, 17 outpatients with osteoarthritis were recruited from June to August, 2010. The subjects were divided into 14 in experimental group and 13 in control group. The taekwondo exercise program was consisted of public taekwondo gymnastics with stretching movement and carried out every 60 minutes, 2 times a week for 12 weeks. Physical fitness of sit up, sit and reach, and agility, KWOMAC, and quality of life were measured. Data were analyzed by t-test and Mann-Whitney test using SPSS program. Results: After the intervention, the physical fitness for muscle endurance (Z=-4.40, p<.001), flexibility (Z=-2.75, p=.006), and agility (Z=-1.95, p=.050) were significantly improved in the experimental group. The mean scores of KWOMAC in the experimental group were significantly decreased (Z=-2.94, p=.003) and the mean difference of quality of life in the experimental group was also significantly increased than that of the control group (Z=-3.50, p<.001). Conclusion: The taekwondo exercise program may have affirmative effects on physical fitness, physical function, and quality of life in women with osteoarthritis.

• The Journal of Korean Physical Therapy
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• 제29권1호
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• pp.7-15
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• 2017

Purpose: This randomized controlled trial was conducted to compare the effectiveness of global postural reeducation to segmental stretching in subjects with neck and shoulder pain. Methods: Sixteen subjects with neck and shoulder pain were randomized into two intervention groups, a global posture reeducation group (n=8) that performed muscle chain stretching, and a segmental stretching group (n=8) that performed conventional static muscle stretching. The intervention program consisted of two 40 minutes individual sessions per week for four weeks. Subjects were evaluated pre-intervention, two-week after intervention and at a four-week follow-up appointment for pain intensity, disability and health-related quality of life. Two-way repeated analysis of variance was used for between-time and between-group comparisons. The significance level was 0.05. Results: Significant pain relief and decreasing discomfort of the neck and shoulder were observed after intervention in both groups, and there was an interaction between time lapse and groups (pain, F=10.31, neck disability, F=25.45, shoulder disability, F=12.82, p<0.05). Quality of life also improved after intervention in both groups. Moreover, the physical components score improved, and a significant interaction was observed between time and groups (F=4.85, p<0.05). However, no significant improvement in mental component score of quality of life and no significant interaction between time and groups were observed (p>0.05). Conclusion: These findings suggest that a GPR intervention in subjects with neck and shoulder pain induces greater improvement of pain and disability and quality of life than segmental stretching.

• 한국축산식품학회지
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• 제34권4호
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• pp.516-524
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• 2014

This study was performed to examine the feasibility of using the low plane of nutrition (LPN) as a means of improving the meat quality of crossbred finishing pigs with a medium weight gain potential. Twenty-four barrows and 24 gilts weighing approximately 48 kg were placed on LPN [a finisher (2.86 Mcal ME/kg and 0.67% lysine) for 91 d] or on a high plane of nutrition [HPN; a commercial grower for 38 d and a finisher (3.35 Mcal ME/kg and 0.9% lysine) for 46 d]. Five barrows and five gilts per treatment weighing approximately 125 kg were slaughtered after the indicated days on the respective diets, followed by physicochemical analysis and sensory evaluation on their muscles. Overall average daily gain was 12.6% less in the LPN group vs. the HPN group (p<0.05). The redness ($a^*$) of fresh longissimus muscle (LM) from the loin as well as from Boston butt was greater in the LPN group vs. HPN whereas the shear force for fresh LM from these primals and semimembranosus muscle was lower in the former. In sensory evaluation for cooked LM, no treatment effect was detected in any of the quality traits examined, except for a lower color score in the LPN vs. HPN group. Results suggest that meat quality of the finishing pigs can be improved to some extent by using LPN. However, the present pigs, whose backfat thickness was 24 mm at 125 kg, are thought not to be lean enough to be fattened over 120 kg.

• 한국엔터테인먼트산업학회논문지
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• 제14권3호
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• pp.363-373
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• 2020

본 연구는 뇌졸중 환자에게 엔터테인먼트요소가 가미된 가상현실과 시각적 되먹임 보행 훈련 프로그램을 병행하여 보행능력과 삶의 질을 향상시키고자 하였다. 이에 휘돌림 보행을 하는 뇌졸중 환자 10명을 선정하여, 가상현실과 힘판을 통한 시각적 되먹임 트레드밀보행훈련을 일일 30분씩, 주5회, 5주간 총 25회 실시하였다. 이러한 보행훈련의 효과를 알아보기 위해 관절가동범위검사, 근활성도 검사, 버그 균형 척도(BBS), 보행분석, 삶의 질(SS-QOL) 평가를 중재 전·후 시행하였다. 본 연구결과, 보행 흔듦기 시기에 마비측 관절가동범위와 근활성도, 동적균형능력, 보행능력, 삶의 질이 중재 후 통계학적으로 유의하게 차이가 있었다(p<0.05). 본 연구결과를 통해 본 연구의 보행훈련이 휘돌림 보행을 하는 뇌졸중 환자의 발처짐, 근활성도, 동적 균형 및 보행능력을 향상시키고, 이로 인한 삶의 질도 개선하는 것을 알 수 있었다. 따라서 휘돌림 보행을 하는 뇌졸중 환자의 보행능력 향상과 삶의 질 개선을 통한 라이프케어증진을 위해 가상현실과 힘판을 통한 시각적 되먹임 트레드밀보행훈련 프로그램 적용을 권장한다.

• Asian-Australasian Journal of Animal Sciences
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• 제22권5호
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• pp.706-711
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• 2009

This study was carried out to compare the growth performance and quality properties of pork from finishing pigs fed different levels of betaine. A total 120 female pigs (Landrace${\times}$Yorkshire${\times}$Duroc) were fed either a control commercial diet or the control diet supplemented with 2, 4 and 6% betaine for 31 days. The average daily feed intake (ADFI) of the 2% diet was lower than of the other treatment groups. The average daily gain (ADG) for pigs fed betaine diets was significantly higher (p<0.05) compared with nonsupplemented diets. Feed conversion ratio (FCR) of pigs fed betaine diets was significantly lower (p<0.05) compared with nonsupplemented diets. pH of loin and ham samples were not significantly different between dietary groups, whereas CIE a* (redness) of pork loin was increased by dietary betaine. Also, the shear force value of loin was significantly higher (p<0.05) in pigs given dietary betaine compared with non-supplemented diets, but no significant differences were found in cooking loss by the loin among diets with different levels of betaine (p>0.05). Dietary supplementation with betaine decreased total cholesterol concentrations in blood, and increased saturated fatty acid and decreased unsaturated fatty acid levels in muscle. Pigs supplemented with betaine had increased betaine concentrations in the loin muscle. It was concluded that dietary betaine supplementation of finishing pigs can improve growth performance and reduce blood cholesterol concentrations. It was also concluded that dietary betaine produced detectable betaine concentrations in the lion muscle.

• 농업과학연구
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• 제31권2호
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• pp.97-104
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• 2004

주로 근섬유에서 발현되는 Myostatin 유전자는 근육의 발달 및 성장과 관련하여 근육이 발달하는 것을 조절하는 유전자로서 성장 분화와 관련된 TGF-${\beta}$ family에 속한다. 소에서 이중 근육(double muscling) 표현형을 보이는 개체를 조사한 결과, myostatin 유전자가 돌연변이 되어 있음을 확인하였다. 소의 중요한 경제형질인 육질과 육량을 포함한 근육의 발달과 밀접한 관련이 있는 myostatin 유전자의 SNP와 발현특성을 분석함으로서 한우의 개량을 위한 기초 자료를 얻기 위하여 본 연구를 수행하였다. 그 결과, 한우에서 유용한 marker로 사용이 가능한 nt2385부위에 SNP가 존재함이 확인되었다. 또한 여러 근육 및 기관에서의 myostatin 발현양상도 비교하여 본 바 myostatin 유전자는 근육에서만 발현하며, 근육간 발현양의 차이를 보임을 알 수 있다.

• 한국축산식품학회지
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• 제35권6호
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• pp.772-782
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• 2015

This study was performed to explore the deterioration of physicochemical quality of beef hind limb during frozen storage at −20℃, affected by repeated freeze-thaw cycles. The effects of three successive freeze-thaw cycles on beef hind limb were investigated comparing with unfrozen beef muscle for 80 d by keeping at −20±1℃. The freeze-thaw cycles were subjected to three thawing methods and carried out to select the best one on the basis of deterioration of physicochemical properties of beef. As the number of repeated freeze-thaw cycles increased, drip loss decreased and water holding capacity (WHC) increased (p<0.05) till two cycles and then decreased. Cooking loss increased in cycle one and three but decreased in cycle two. Moreover, drip loss, WHC and cooking loss affected (p<0.05) by thawing methods within the cycles. However, pH value decreased (p<0.05), but peroxide value (p<0.05), free fatty acids value (p<0.05) and TBARS value increased (p<0.05) significantly as the number of repeated freeze-thaw cycles increased. Moreover, significant (p<0.05) interactive effects were found among the thawing methods and repeated cycles. As a result, freeze-thaw cycles affected the physicochemical quality of beef muscle, causing the degradation of its quality.

• Asian-Australasian Journal of Animal Sciences
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• 제31권8호
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• pp.1345-1357
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• 2018

Objective: This study examined the influence of dietary supplementation of Nigella sativa seeds, Rosmarinus officinalis leaves and their combination on carcass attributes, fatty acid (FA) composition, gene expression, lipid oxidation and physicochemical properties of longissimus dorsi (LD), semitendinosus (ST), and supraspinatus (SS) muscles in Dorper lambs. Methods: Twenty-four Dorper lambs ($18.68{\pm}0.6kg$, 4 to 5 months old) were randomly assigned to a concentrate mixture containing either, no supplement (control, T1), 1% Rosmarinus officinalis leaves (T2), 1% Nigella sativa seeds (T3), or 1% Rosmarinus officinalis leaves+1% Nigella sativa seeds (T4) on a dry matter basis. The lambs were fed the treatments with urea-treated rice straw for 90 days, slaughtered and the muscles were subjected to a 7 d postmortem chill storage. Results: The T2 lambs had greater (p<0.05) slaughter and cold carcass weights than the control lambs. Dietary supplements did not affect (p>0.05) chill loss, dressing percentage, carcass composition, intramuscular fat and muscle pH in Dorper lambs. Meat from supplemented lambs had lower (p<0.05) cooking and drip losses, shear force, lightness, and lipid oxidation and greater (p<0.05) redness compared with the control meat. The impact of dietary supplements on muscle FA varied with muscle type. Diet had no effect (p>0.05) on the expression of stearoyl-CoA desaturase and lipoprotein lipase genes in LD and ST muscles in Dorper lambs. The T2 and T3 diets up regulated the expression of AMP-activated protein kinase alpha 2 gene in LD and ST muscles and up regulated the expression of sterol regulatory element-binding protein 1 in ST muscle in Dorper lambs. Conclusion: Dietary supplementation of Nigella sativa seeds and Rosmarinus officinalis leaves had beneficial effects on meat quality in Dorper lambs.

• The Korean Journal of Pain
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• 제33권3호
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• pp.258-266
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• 2020

Background: The genicular nerve block (GNB) is demonstrated from several reports to alleviate pain and improve knee functionality in patients with chronic knee osteoarthritis (OA). Ultrasound (US)-guided GNB has been the most used imaging method. This study aimed to compare the effectiveness of US-guided versus blind GNB in the treatment of knee OA. Methods: This prospective, randomized clinical trial included patients with knee OA based on American College of Rheumatology diagnostic criteria. The patients were evaluated for clinical and dynamometer parameters at the baseline, 4 weeks after treatment, and 12 weeks after treatment. The patients underwent blind injection or US-guided injection. Results: When compared with the baseline, both groups showed significant improvement in pain, physical function, and quality of life parameters. Significant differences were observed between the groups for clinical parameters (30-second chair stand test, 6-minute walk test) in favor of the US-guided group. On the other hand, blind injection was more significantly effective on some parameters of the Nottingham Health Profile. There wasn't any significant improvement in isokinetic muscle strength for either group. Conclusions: This study demonstrated that both US-guided and blind GNB, in the treatment of knee OA, were effective in reducing symptoms and improving physical function. GNB wasn't an effective treatment for isokinetic muscle function. US-guided injections may yield more effective clinical results than blind injections.