• 대한의생명과학회지
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• 제23권3호
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• pp.208-214
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• 2017

To investigate the effects of strenuous physical exercise on commonly used hematological markers in subjects the intensive long running. Blood samples were obtained from nineteen participants in a 622 km ultra-marathon race before, 300 km and immediately after completion of the 622 km ultra-marathon. Samples were analyzed for total white cell count (WBC) and differential, total red cell count (RBC), hemoglobin, hematocrit, mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC), red cell distribution width (RDW), platelets, mean platelets volume (MPV), platelets distribution width (PDW). Significant increases were found in WBC, neutrophil and platelets at 622 km compared to the pre-race. RBC, hemoglobin and hematocrit decreased statistically significantly the race at 300 km and 622 km compared to pre-race. A wide range of hematological perturbations occur during 622 km ultra-marathon running but it was physiological changes within a reference range. The 622 km ultra-marathon is less likely to cause clinically significant hematologic changes in athletes.

• 한국임상약학회지
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• 제26권3호
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• pp.264-266
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• 2016

A 21-year-old healthy Korean man worked on a building construction site every day for almost 2 months and exercised every day for 1 or 2 hours after working hard. He felt dizziness, nausea, and experienced vomiting and body aches immediately after exercise and immediately took cold medicines including acetaminophen, cimetidine, bepotastine, and Codenal? complex for the common cold symptoms for 2 days because he was scheduled to participate in navy training at that time. He complained of severe trapezius pain and aches in his left calf 3 days after joining the Navy training. Testing revealed creatine phosphokinase (CPK) 6260 U/L, myogloblin 176 mcg/L in the urine, liver enzymes increased, and oliguria, suggesting rhabdomyolysis. He recovered with intravenous fluids without any complications.

• 생명과학회지
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• 제25권11호
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• pp.1324-1330
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• 2015

운동에 종사하는 엘리트 운동선수나 동호인들은 지속적인 같은 동작의 반복, 잦은 경쟁스트레스의 경험, 그리고 신체적인 컨디션이 좋지 않은 상황에서의 과도한 훈련의 요구 때문에 근육, 건, 인대, 염좌 및 골절과 같은 부상을 비롯한 근골격계 질환을 야기한다. 그리고 과도한 오버리칭, 경쟁불안으로 인한 스트레스, 및 피로회복의 부족 등으로 운동기술의 정체를 비롯한 운동수행력의 감소는 물론 심리적인 스트레스와 면역반응의 감소를 경험하게 된다. 따라서 본 연구에서는 과훈련증후군의 원인과 증상 및 치료와 처치에 대해 분석하고 이러한 증후군과 면역반응과 연관성을 비교 및 분석하여 운동 동호인을 비롯한 운동 선수들에게 나타날 수 있는 면역력의 감소를 줄여, 운동수행력의 증진은 물론 건강유지와 면역력 회복을 도모하고자 한다. 본 연구의 목적을 달성하기 위해 본론에서는 과훈련 증후군에 대한 전반적인 내용을 실험연구를 비롯한 관련 연구논문을 중심으로 분석하였고, 아울러 과훈련 증후군과 면역반응 및 알레르기 면역반응과의 연관성에 대해 면밀한 분석을 실시하였다. 본 연구 결과를 토대로 많은 스포츠 현장에서 과훈련증후군에 관한 실험적인 연구와 면역반응 및 알레르기반응과의 연관성 분석을 토대로 한 실험적 연구가 진행되어야 할 것으로 여겨지며, 본 연구가 많은 운동선수들과 동호인들의 건강관리는 물론, 면역력의 증가를 도모하는 데에 도움을 줄 것으로 여겨진다.

• The Korean Journal of Pain
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• 제29권4호
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• pp.249-254
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• 2016

Background: This study aimed to investigate the effect of strenuous exercise on ${\beta}$-endorphine (${\beta}$-END) level in fibromyalgia (FM) patients compared to healthy subjects. Methods: We enrolled 30 FM patients and 15 healthy individuals. All study participants underwent a treadmill exercise test using modified Bruce protocol (M.Bruce). The goal of the test was achieving at least 70% of the predicted maximal heart rate (HRMax). The serum levels of ${\beta}$-END were measured before and after the exercise program. Measurements were done while heart rate was at least 70% of its predicted maximum. Results: The mean ${\pm}$ the standard deviation (SD) of exercise duration in the FM and control groups were $24.26{\pm}5.29$ and $29.06{\pm}3.26$ minutes, respectively, indicating a shorter time to achieve the goal heart rate in FM patients (P < 0.003). Most FM patients attained 70% HRMax at lower stages (stage 2 and 3) of M.Bruce compared to the control group (70% versus 6.6%, respectively; P < 0.0001). Compared to healthy subjects, FM patients had lower serum ${\beta}$-END levels both in baseline and post-exercise status ($Mean{\pm}SD$: $122.07{\pm}28.56{\mu}g/ml$ and $246.55{\pm}29.57{\mu}g/ml$ in the control group versus $90.12{\pm}20.91{\mu}g/ml$ and $179.80{\pm}28.57{\mu}g/ml$ in FM patients, respectively; P < 0.001). Conclusions: We found that FM patients had lower levels of ${\beta}$-END in both basal and post-exercise status. Exercise increased serum the ${\beta}$-END level in both groups but the average increase in ${\beta}$-END in FM patients was significantly lower than in the control group.

• Journal of Electrical Engineering and Technology
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• 제9권1호
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• pp.372-377
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• 2014

Being able to monitor the heart will allow the diagnosis of heart diseases for patients during daily activities, and the detection of burden on the heart during strenuous exercise. Furthermore, with the help of U-health technology, immediate medical action can be taken, in the case of abnormal symptoms of the heart in daily life. Therefore, it appears to be necessary to develop the corresponding technology to monitor the condition of the heart daily. In this study, a novel wearable smart system was proposed, to monitor the activity of the heart in daily life, and to further evaluate the rhythm of arrhythmia. The wearable system includes three modified bipolar conductive fiber electrodes in the chest part, which can resolve the reduction problem of the magnitude of the signal, by magnifying the signal and removing the noise, to obtain high affinity and validity for medical-type usage (<0.903%). The biological signal acquisition and data lines, and the signal processing engine and communication consist of a conductive ink, and the pic18 and ANT protocol nRF24AP2, respectively. The proposed algorithm was able to detect a strong ECG, signal and r-point passing over the noise. The confidence intervals were 96 %, which could satisfy the requirement to detect arrhythmia under the unconstrained conditions.

• 한국산업보건학회지
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• 제24권3호
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• pp.383-392
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• 2014

Purpose: In this study, we sought to understand the risk factor for chronic disease of workers by studying the association between occupational standing time and metabolic syndrome(MetS) in full-time 300 male workers. Materials: Data on age, life habit, work related information of the subjects were surveyed using self-reported questionnaire and interview. MetS was identified based on the report of Alberti et al.(2009). As for the data analysis, SPSS 19.0 was used to conduct the descriptive statistic, ANOVA, Pearson correlation coefficient and multiple logistic regression analysis. Results: Daily working hour affects on the lifting heavy objects, running and strenuous exercise(r=-0.137, p<0.01), and total physical function decreased with the increase in age(r=-0.145, p<0.01). Also, obese was significantly associated with genuflection and bend over(r=-0.110, p<0.05). On multiple logistic regression analysis for the diagnostic indices of MetS, occupational standing time were significantly associated with waist circumference(odds ratio=0.885, ${\beta}$ value=-0.122, 95% CI=0.797-0.983, p<0.05) and triglyceride (odds ratio=0.873, ${\beta}$ value=-0.136, 95% CI=0.800-0.953, p<0.01). Conclusions: These results suggest that the working posture may be important risk factor in pathogenesis and growing of MetS and cardiovascular disease.

• Korean Journal of Acupuncture
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• 제28권4호
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• pp.59-66
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• 2011

Objectives : This study is aimed to evaluate and objectify the therapeutic effect of moxibustion on muscle fatigue recovery. Methods : To evaluate the therapeutic effect on the muscle fatigue recovery, we compared the fatigue recovery of two groups (non-stimulation group and moxibustion group) by analyzing the EMG and peak torque after strenuous knee exercise of isokinetic contraction. Results : The median frequency (MF) of the moxibustion group was recovered faster than that of the non-stimulation group. However, the peak torques of both groups were not restored until after 20 minutes. Nevertheless, the moxibustion group's peak torque was regained higher than that of the non-stimulation group. Conclusions : We confirmed the therapeutic effect of moxibustion and found that the moxibustion can used as prevention method for musculoskeletal disease.

• 한국운동역학회지
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• 제26권2호
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• pp.143-151
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• 2016

Objective: The purpose of this study was to investigate the effect of fatigue induction on ground reaction force (GRF) components, postural stability, and vertical jump performance in Taekwondo athletes. Method: Ten Taekwondo athletes (5 men, 5 women; mean age, $22.30{\pm}2.62years$; mean height, $174.21{\pm}9.20cm$; mean body weight, $67.28{\pm}12.56kg$) participated in this study. Fatigue was induced by a short period of strenuous exercise performed on a motorized treadmill. The analyzed variables included vertical jump performance, static stability (mediolateral [ML], center of pressure [COP], anteroposterior [AP] COP, ${\Delta}COPx$, ${\Delta}COPy$, and COP area), postural stability index values (ML stability index [MLSI], AP stability index [APSI], vertical stability index [VSI], dynamic postural stability index [DPSI]), and GRF components (ML force, AP force, peak vertical force [PVF], and loading rate). To analyze the variables measured in this study, PASW version 22.0 was used to calculate the mean and standard deviation, while a paired t-test was used to evaluate the pre- versus post-fatigue results. Pearson's correlation coefficients among variables were also analyzed. The statistical significance level was set at ${\alpha}$ = .05. Results: Vertical jump performance decreased significantly after the induction of fatigue, while AP COP, ${\Delta}COPx$, COP area, APSI, VSI, and DPSI increased significantly. PVF and loading rate increased significantly after the induction of fatigue, while the postural stability variables (AP COP, ${\Delta}COPy$, COP area, APSI, VSI, DPSI) were similarly correlated with GRF components (PVF, loading rate) after fatigue was achieved (r = .600, $R^2$ = 37%). Conclusion: These results suggest that the induction of fatigue can decrease postural stability and exercise performance of Taekwondo athletes during training and competition sessions.

• 한국직업건강간호학회지
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• 제25권4호
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• pp.384-393
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• 2016

Purpose: The purpose of this study was to examine the effectiveness of Participatory Action-Oriented Training (PAOT) programs in korean manufacture workers with metabolic syndrome for three years. Methods: A total of 890 workers with risks of metabolic syndrome were recruited from one workplace. The experimental group (n=51) received PAOT program for the preventive management on metabolic syndrome, while the control group (n=51) received conventional program. Results: In the experimental group who participated in PAOT program, percentage of achieved action plans was 73.4% at three months, 75.8% at six months, 82.8% at three years. After three years, the rate of risk factor in the experimental group has significantly decreased from $1.94{\pm}1.77$ to $0.76{\pm}1.25$ for moderate exercise, and from $1.72{\pm}2.01$ to $1.04{\pm}1.59$ for the strenuous exercise. Systolic and diastolic blood pressure has significantly decreased from $125.06{\pm}11.83$ to $117.65{\pm}19.94$, from $83.45{\pm}13.38$ to $76.39{\pm}8.09$ mmHg. In addition, risk factor score also decreased from $3.31{\pm}0.61$ to $1.41{\pm}0.89$. Conclusion: To improve the effectiveness of PAOT program for the management of risk factors of metabolic syndrome, there is a need to continue implement programs and analyze the long-term effects are required in the workplace.

• 한국체육학회지인문사회과학편
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• 제55권3호
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• pp.465-472
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• 2016

본 연구는 위암과 대장암으로 진단 받은 암 경험자를 대상으로 신체구성과 신체활동량을 비교 분석하고 성별, 연령에 따른 신체활동 참여도를 분석하고자 하였다. 2014년 6월부터 2015년 4월까지 서울 시내 소재 Y대학병원 암예방센터에 방문한 위암과 대장암으로 진단 받은지 4년이 지난 암경험자 354명(위암: 169명, 대장암: 185명)을 대상으로 실시하였다. 신체활동량은 국제신체활동설문지(Global Physical Activity Questionnaire, GPAQ)의 한글판 설문지를 사용하였고 추가로 주당 걷기운동량과 근력운동 횟수를 설문하였다. 연구 결과 대장암 경험자가 위암 경험자보다 체질량지수, 허리둘레, 체지방률, 혈압 및 당뇨 유병률이 높게 나타났다. 또한 중강도 신체활동 150분 또는 고강도 신체활동 75분 이상 참여하는 위암 경험자는 41.4%, 대장암 경험자는 26.5%로 위암 경험자의 신체활동량이 더 높은 것으로 나타났고 일주일에 2회 이상 근력운동에 참여한 환자는 전체 평균 13.6%로 나타났다. 위암과 대장암 경험자 중 남자가 여자보다 신체활동참여율이 높았고, 65세 미만이 65세 이상 그룹보다 신체활동량이 높게 나타나고 좌식생활은 낮게 나타났다. 대장암과 위암 경험자들의 신체활동 참여율을 증진시키지 위한 대안이 제시되어야 하며, 특히 여성과 노인의 신체활동 참여율의 증진에 힘써야 한다.