• Title/Summary/Keyword: College sports

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Reliability and Validity of Ultrasound Imaging and sEMG Measurement to External Abdominal Oblique and Lumbar Multifidus Muscles (외복사근과 다열근에 대한 초음파 영상과 표면 근전도 측정방법의 신뢰도와 타당도)

  • Kim, Chang-Yong;Choi, Jong-Duk;Kim, Suhn-Yeop;Oh, Duck-Won;Kim, Jin-Kyung
    • Physical Therapy Korea
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    • v.18 no.1
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    • pp.37-46
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    • 2011
  • The purpose of this study was to investigate intra-rater reliability and determine the validity of electromyography (EMG) measurements to represent muscle activity and ultrasonography (US) to represent muscle thickness during manual muscle testing (MMT) to external abdominal oblique (EO) and lumbar multifidus (MF). Twenty healthy subjects were recruited for this study and asked to perform MMT at differing levels. The subjects' muscle activity using EMG was measured by a ratio to maximum voluntary contraction (MVC) and root mean square (RMS) methods. The subjects' muscle thickness using US was measured by raw muscle thickness and change ratio of thickness to maximum (MVC) or resting condition. In three trials, measurements were performed on each subject by one examiner. The intra-rater reliability of measurements of EMG and US to EO and MF was calculated using intra-class coefficients. The intra-rater reliability of all measurements was excellent (ICC=.75~.98) in EMG and US. The conduct validity was calculated by one-way ANOVA with repeated measurements to compare whether the EMG and US measurements were different between MMT at different levels. There was only a significant difference between all grades at %MVC thickness measurement of US. These results suggest that a %MVC thickness measurement of US was a more sensitive and discriminate in all manual muscle testing grades. This information will be useful for the selection of US measurement and analysis methods in clinics.

Comparison of Selected Joint Angles at Golf Address Among Three Different Somatotypes (체형에 따른 골프 어드레스 동작의 주요 관절각도 비교)

  • Choi, Min-Chul;Lee, Chang-Jin;Lim, Young-Tae
    • Korean Journal of Applied Biomechanics
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    • v.20 no.4
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    • pp.437-445
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    • 2010
  • This study was aimed at comparing selected joint angles at the golf address stance by categorizing three different body types. 43 elite male golfers were selected and 9 of them turned out to be the ectoderm while 24 of them to be the mesoderm. The remaining 10 subjects were the endoderm. The measurement was carried out at the address stance with the number 7 iron and the driver. The result showed that the angle of trunk flexion did not different among body types. The trunk tilting angle became more inclined to the right side, which confirmed the guidelines from most of golf lesson books, for bigger people since they tended to put more weight on the right foot. The angle of both knees showed similar but the right knee was bent more than the left knee. The target direction and body alignment faced more to the left side than the target spot because of the influence of open stance and natural aiming position. It seems that pelvis and knees turned a little bit more to the right side than the target direction in order to maintain the parallel. Overall, significant differences among body types were found at the trunk tilting angle and pelvis-target alignment and golf address configuration can be differentiate by these factors.

The Effect of Acute Exhaustive Exercise and Long-term Endurance Exercise Training on the Protein Expression of Mn-SOD, HSP70 and PPAR-γ in the Heart of rats (일회성 탈진운동과 장기간 지구성 트레이닝이 심장근의 Mn-SOD, HSP70 및 PPAR-γ 단백질 발현에 미치는 영향)

  • Jun, Jongkui;Yoon, Aram;Lee, Kwangmoo;Lee, Wanglok
    • Korean Journal of Exercise Nutrition
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    • v.13 no.2
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    • pp.161-167
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    • 2009
  • The purpose of this study was to investigate whether two different exercises, acute exhaustive exercise and long-term endurance exercise training could affect to the expression of Mn-SOD, HSP70, and PPAR-γ protein in myocardium. The Wistar-Kyoto rats(n=24, 4 weeks) were used and randomly divided into 3 groups; endurance exercise training group (EET, n=8), acute exhaustive exercise group (AEE, n=8) or control group (CON, n=8). EET performed treadmill exercise for 12 weeks (5 days/week, 30~60 min/day). AEE exercised treadmill running (speed increased gradually to 14-26 m/min, 60 min ±10min) until exhausted when EET finished the program. Then, all the rats were sacrificed 48 hours rest at least after the last session of their own exercise program. Hearts were isolated and then the expression of Mn-SOD, HSP70, and PPAR-γ were analyzed by western blotting. One-way repeated ANOVA was used and p value under 0.05 was considered as statistical significance. The results were followed as; the expression of Mn-SOD of AEE was decreased compared with CON. However, the expression of Mn-SOD of EET was increased compared with CON. There was significant difference between AEE and EET in the expression of Mn-SOD. The expressions of HSP70 and PPAR-γ in the both AEE and EET were significantly increased compared with CON. In conclusion, acute exhaustive exercise might induce oxidative stress wheres endurance exercise training could ameliorate the oxidative conditions by increase of Mn-SOD, HSP70, and PPAR-γ. Therefore, we suggested that endurance exercise training could enhance the complementary antioxidant system and improve to prevent apoptosis. Further, a long-term moderat aerobic exercise program might play a important role in mitochondrial biogenesis in the heart.

The Relationships between Sports Ability Beliefs, Achievement Goal Orientation, Exercise Flow, and Perceived Performance in College Golf Athletes (대학 골프선수들의 운동능력믿음, 성취목표성향, 운동몰입 및 인지된 경기력의 관계)

  • Bum, Chul-Ho
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.2
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    • pp.268-276
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    • 2017
  • The aim of this study was to verify the theoretical relationship between sports ability beliefs, achievement goal orientation, exercise flow, and athletic performance in college golf athletes. The results of the Statistical Package for Social Sciences (SPSS) 18.0 and Analysis of MOment Structures (AMOS) 18.0 performed on the data collected from 211 participants are as follows. First, hypothesis testing showed that college golf athletes with incremental beliefs set task-oriented goals (C.R.=3.780, p<.001). Second, the task-oriented goals (C.R.=4,082, p<.001) and ego-oriented goals (C.R.=3.819, p<.001) in achievement goal orientation raised the level of flow during golf. Third, in achieving goal orientation, only task orientation led to a higher perceived level of golf performance (C.R.=3.020, p<.01). Fourth, a higher level of flow led to higher levels of golf performance (C.R.=4.642, p<.001). Other sub-factors were not statistically significant in the current study. These results could be applied in the field of sports as they show what results can be achieved depending on the athlete's belief in their sports ability.

The Effects of Dried Orange Peel Compound intaking and Exercise Training on the Physique, Body Fat, and Concentration of Blood Lipid in Obese Women (진피 복합제 복용과 운동이 비만 여성의 체격, 체지방 및 혈중지질에 미치는 영향)

  • Lee, Kyu-Moon;Kim, Hyeon-Ju;Kim, Seung-Hwan;Kim, Hack-Seang;Ro, Jai-Seup;Oh, Ki-Wan;Lee, Kyong-Soon;Choi, Jong-Hwan
    • Korean Journal of Pharmacognosy
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    • v.33 no.1 s.128
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    • pp.57-63
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    • 2002
  • The purpose of this research was to investigate the effects of dried orange peel compound intaking and exercise training on the physique, body fat, and concentration bloodlipid in obese women. Ninety-seven volunteers(mean age 21.47 ${\pm}$ 1.47 yrs), all over 30% of body fat, agreed to Participate and were placed in 4 groups: dried orange peel compound intaking and exercise group(n=25), only exercise group(n=25), only dried orange peel compound intaking group(n=24), and control group(n=20). The subjects who joined this project were asked to take dried orange peel compound(2 times/day, 30 ml/time) or participate in exercise program(3 times/week, 70 min/day), depending on particular group for 12 weeks. They were tested on their height, weight, circumference of chest, abdomen, hip, and thigh, body fat%, total-cholesterol(TC), HDL-C, LDL-c, and triglyceride(TG) at the beginning and the end of the 12-weeks program. For data analysis, paired t-tests and ANCOVAs were used. The intaking of dried orange peel compound was influenced on weight, circumference of chest, abdomen, hip, and thigh, body fat%, HDL-C, LDL-C, and TG. The exercise participation had almost same effects on those dependent variables. Furthermore, the dried orange peel compound intaking along with exercise training was the most effective on those dependent variables among them. Therefore, these results indicate that dried orange peel compound intaking, like exercise, may be useful for controling weight, body fat, HDL-C, LDL-C, and TG.

Insulin-like Growth Factor-I Regulates the FAT/CD36 Expression in C2C12 Skeletal Muscle Cells (C2C12 골격근 세포에서 FAT/CD36 발현 조절에 있어 Insulin-like growth factor-I이 미치는 영향)

  • Kim, Hye Jin;Yoon, Hae Min;Kim, Tae Young;Lee, Won Jun
    • Journal of Life Science
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    • v.26 no.7
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    • pp.758-763
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    • 2016
  • Fatty acid transporters are key mediators of skeletal muscle lipid metabolism. Several protein groups have been implicated in cellular long-chain fatty acid uptake or oxidation, including fatty acid transporter proteins (FATPs), the plasma membrane fatty acid-binding protein (FABPpm), and the fatty acid translocase (FAT/CD36). FAT/CD36 is highly expressed in skeletal muscle and known to be regulated by various factors such as exercise and hormones. Insulin-like growth factor-I (IGF-I) is a well-known regulator of skeletal muscle cells. However, it has not been studied whether there is any interaction between IGF-I and FAT/CD36 in skeletal muscle cells. In this study, the effects of IGF-I treatment on FAT/CD36 induction were examined. Differentiated C2C12 cells were treated with 20 ng/ml of IGF-I at different time points. Treatment of C2C12 cells with IGF-I resulted in increased FAT/CD36 mRNA and protein expression. After 24 and 48 hr of IGF-I treatment, FAT/CD36 mRNA increased 89% and 24% respectively. The increase of both proteins returned to the control level after 72 hr of IGF-I treatment, suggesting that the FAT/CD36 gene is regulated pretranslationally by IGF-I in skeletal muscle cells. These results suggest that IGF-I can regulate the expression of FAT/CD36 in skeletal muscle cells. In conclusion, IGF-I induces a rapid transcriptional modification of the FAT/CD36 gene in C2C12 skeletal muscle cells and has modulating effects on fatty acid uptake proteins as well as oxidative proteins.

Influence of Prenatal Noise and Music on the Expressions of c-Fos and Nitric Oxide Synthase in the Hippocampus of Rat Pups

  • Kim, Su-Mi;Lee, Sam-Jun;Kim, Hong;Baek, Seung-Soo;Sung, Yun-Hee;Lee, Jin-Woo;Kim, Young-Sick;Kim, Sung-Eun;Shin, Mal-Soon;Kim, Chang-Ju;Lee, Choong-Yeol
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.21 no.5
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    • pp.1291-1296
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    • 2007
  • The expressions of c-Fos and nitric oxide synthase (NOS) represent neuronal activity and play' a crucial role in the shaping of the development of brain. During the late pregnancy, stresses may influence neuronal activity of prenatal rats. In the present study, the effects of prenatal noise and music on the expressions of c-Fos and NOS in the hippocampus of rat pups were investigated. Exposure to the noise during pregnancy decreased c-Fos and NOS expressions in the hippocampus of rat pups, whereas exposure to music during pregnancy increased c-Fos and NOS expressions in the hippocampus of rat pups. The present results show that prenatal music stimulation may increase neuronal activity of rat offspring, whereas exposure to noise during pregnancy may reduce the neuronal activity of offspring. The present study suggests that prenatal stimuli including noise and music could affect the fetal brain development.

Ursolic acid supplementation decreases markers of skeletal muscle damage during resistance training in resistance-trained men: a pilot study

  • Bang, Hyun Seok;Seo, Dae Yun;Chung, Young Min;Kim, Do Hyung;Lee, Sam-Jun;Lee, Sung Ryul;Kwak, Hyo-Bum;Kim, Tae Nyun;Kim, Min;Oh, Kyoung-Mo;Son, Young Jin;Kim, Sanghyun;Han, Jin
    • The Korean Journal of Physiology and Pharmacology
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    • v.21 no.6
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    • pp.651-656
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    • 2017
  • Ursolic acid (UA) supplementation was previously shown to improve skeletal muscle function in resistance-trained men. This study aimed to determine, using the same experimental paradigm, whether UA also has beneficial effects on exercise-induced skeletal muscle damage markers including the levels of cortisol, B-type natriuretic peptide (BNP), myoglobin, creatine kinase (CK), creatine kinase-myocardial band (CK-MB), and lactate dehydrogenase (LDH) in resistance-trained men. Sixteen healthy participants were randomly assigned to resistance training (RT) or RT+UA groups (n=8 per group). Participants were trained according to the RT program (60~80% of 1 repetition, 6 times/week), and the UA group was additionally given UA supplementation (450 mg/day) for 8 weeks. Blood samples were obtained before and after intervention, and cortisol, BNP, myoglobin, CK, CK-MB, and LDH levels were analyzed. Subjects who underwent RT alone showed no significant change in body composition and markers of skeletal muscle damage, whereas RT+UA group showed slightly decreased body weight and body fat percentage and slightly increased lean body mass, but without statistical significance. In addition, UA supplementation significantly decreased the BNP, CK, CK-MB, and LDH levels (p<0.05). In conclusion, UA supplementation alleviates increased skeletal muscle damage markers after RT. This finding provides evidence for a potential new therapy for resistance-trained men.

Landing with Visual Control Reveals Limb Control for Intrinsic Stability

  • Lee, Aeri;Hyun, Seunghyun;Ryew, Checheong
    • International Journal of Internet, Broadcasting and Communication
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    • v.12 no.3
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    • pp.226-232
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    • 2020
  • Repetition of landing with visual control in sports and training is common, yet it remains unknown how landing with visual control affects postural stability and lower limb kinetics. The purpose of this study was to test the hypothesis that landing with visual control will influence on lower limb control for intrinsic dynamic postural stability. Kinematics and kinetics variables were recorded automatically when all participants (n=10, mean age: 22.00±1.63 years, mean heights: 177.27±5.45 cm, mean mass: 73.36±2.80 kg) performed drop landings from 30 cm platform. Visual control showed higher medial-lateral force, peak vertical force, loading rate than visual information condition. This was resulted from more stiff leg and less time to peak vertical force in visual control condition. Leg stiffness may decrease due to increase of perturbation of vertical center of gravity, but landing strategy that decreases impulse force was shifted in visual control condition during drop landing. These mechanism explains why rate of injury increase.