• 대한물리의학회지
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• 제13권4호
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• pp.67-74
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• 2018

PURPOSE: This study was conducted to investigate the effects of vibration frequency and amplitude on scapular winging during the knee push-up plus exercise. METHODS: A total of 26 female subjects with scapular winging were evaluated while performing the knee push-up plus exercise with no vibration, low-frequency/low-amplitude (5 Hz/3 mm) vibration, low-frequency/high-amplitude (5 Hz/9 mm) vibration, high-frequency/low-amplitude (15 Hz/3 mm) vibration, and high-frequency/high-amplitude (15 Hz/9 mm) vibration. The surface EMG of the serratus anterior (SA) muscle was compared between the vibration frequency and amplitude. The EMG amplitude was normalized using the maximal voluntary isometric contraction (MVIC). The statistical significance of the results was evaluated using one-way ANOVA. RESULTS: The SA muscle EMG values increased at low-frequency/low-amplitude vibration and at low-frequency/high-amplitude vibration compared to no vibration. Furthermore, the same values increased at high-frequency/low-amplitude vibration and high-frequency/high-amplitude vibration compared to no vibration. In general, a higher vibration frequency and amplitude was associated with higher EMG values of the SA muscle, with particularly greater increases observed during high-frequency/high-amplitude vibration. There was also a significant difference between each condition with a high-frequency/high-amplitude vibration (p<.05). CONCLUSION: This study suggests that there were remarkable clinical effect of the knee push-up plus exercise with vibration, which enhanced the SA muscle activation in persons with scapular winging. Furthermore, applying a higher vibration frequency and amplitude more effectively increased for increasing SA muscle activation.

• 산업융합연구
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• 제18권2호
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• pp.37-44
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• 2020

본 연구는 당뇨병 환자의 건강인식, 운동욕구, 자기효능감이 운동빈도에 미치는 영향을 파악하기 위해 시행된 서술적 연구이다. 2018년 6월부터 7월에 걸쳐, A광역시에 속한 두 개의 대학병원 내분비내과 외래를 방문한 당뇨병 진단을 환자들 중에서 자발적으로 설문지를 작성할 수 있는 86명의 환자를 대상으로 하였다. 연구결과는 서술적 기술 통계량과 Pearson 상관계수, 단계적 회귀분석을 사용하여 분석하였다. 연구결과 운동빈도는 건강인식(r=..215, p=.043), 자기효능감(r=.440, p<.001)과 유의한 양의 상관관계를 나타내었고 운동욕구(r=.144, p=.304)와는 유의한 상관관계를 나타내지 않았다. 회귀분석을 시행한 결과 운동빈도에 미치는 요인은 자기효능감(β=.440, p<.001)만이 유의한 영향을 미치는 것으로 나타났으며 모형의 설명력은 18.4%(F=20.836, p<.001)로 나타났다. 결론적으로 건강에 대한 긍정적인 인식은 자기효능감과 양의 상관관계가 있으며 자기효능감이 높을수록 운동빈도가 증가하게 된다. 따라서, 당뇨병 환자의 건강인식을 높이는 중재와 자기효능감 강화 교육 프로그램이 개발된다면 당뇨병 환자의 운동빈동, 즉 실질적 운동 자기관리를 증진시키는데 도움이 될 것이다.

• 대한의용생체공학회:의공학회지
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• 제24권3호
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• pp.175-181
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• 2003

근피로 연구는 주로 등척성(isometric)운동에서 수행되었고 등장성(isotonic)운동에서 얻은 근전도 신호는 통제하기 힘든 잡음이 많아 등척성운동에서 사용된 주파수분석기법을 동일하게 적용하였을 때 신뢰할만한 중앙주파수 자료와 근피로 판정용 변수를 구하는데 어려움이 있었다 이에 본 연구에서는 등장성운동에서 측정한 근전도신호의 중앙주파수 검출방법에 따른 근피로 판정 변수들의 차이를 비교해 보고자 하였다 이를 위해 동일한 근전도신호를 가지고 FFT 수행간격과 연속적인 FFT구간의 중첩비율을 다르게 하여 중앙주파수를 검출하고 이들의 선형회귀직선을 구하여 회귀직선상의 변수인 초기중앙주파수, 기울기. 근피로지수를 비교한 결과, 초기중앙주파수의 경우 FFT 수행간격이 넓을수록 조금씩 상승하는 것으로 나타났고, 기울기의 경우 FFT 수행간격이 넓을수록 중첩구간이 적을수록 기울기의 감소경향이 뚜렷하게 나타났다. 근피로지수의 경우는 특정 FFT 수행간격에서 가장 높은 수치를 나타냈다

• The Journal of Korean Physical Therapy
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• 제27권3호
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• pp.129-134
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• 2015

Purpose: The purpose of this study was to determine the influence of WBV exercise on CMJ and quadriceps muscle activation according to different frequency of vibration in soccer player and also to find effective frequency for leading appropriate treatment reaction. Methods: Thirty three subjects were randomly divided into three groups: the three groups are WBV group using 20 Hz frequency, WBV group using 30 Hz frequency and squat exercise group according to training method. The exercise program was conducted for six weeks. Subjects were measured on CMJ and quadriceps muscle activation. Results: Significant difference in CMJ was observed in the group I, II compared with the group III (p<0.05). Results of post-hoc, showed a significant difference in CMJ in on group I, II compared with the group III, but no a statistically significant difference between group I and II. Significant difference in quadriceps muscle activation was observed in the group I, II compared with the group III (p<0.05, p<0.01). Results of post-hoc, significant difference in quadriceps muscle activation in on group I, II compared with the group III and significant difference between group I and group II. Conclusion: This research intervened WBV for soccer players and compared the differences of CMJ and quadriceps muscle activation; as a result of the effective frequency for improving performance, there is a significant difference in CMJ and quadriceps muscle activation of WBV group with comparison of control group; and it was proved that WBV is effective using 30 Hz frequency for improving quadriceps muscle activation.

• The Korean Journal of Physiology
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• 제30권1호
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• pp.43-51
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• 1996

This study was aimed to elucidate the changes in heart rate variability during treadmill exercise at various speeds and grades by spectral analysis. Thirty-three untrained male college students aged $20{\sim}26\;yr $were employed to exercise on a treadmill using 4 speeds (4.02, 5.47, 6.76 and 8.05 km/h) and 6 grades (0, 4, 8, 12, 16 and 20%). A fixed speed was selected for each session with the grade increased every 3 min. The electrocardiogram, respiration and the stepping activity were continuously recorded through an A/D converter system on the computer disk. Power spectra of heart rate variability (RRV) were obtained by use of a fast Fourier transform algorithm. The frequency domain was divided into 3 bands: $VLF\;(0{\sim}0.04\;Hz),\;LF\;(0.04 {\sim}0.15\;Hz)\;and\;HF\;(0.15{\sim}1.00\;Hz).$ Heart rate was $74.4{\pm}2.1\;beats/min$ at rest and showed a steady increase during treadmill exercise with increasing speed and grade up to $196.7{\pm}5.0\;beats/min.$ Total power of HRV was $35.0{\pm}6.7\;(beats/min)^{2}$ at rest and progressively decreased during exercise down to $1.9{\pm}0.3\;(beats/min)^{2}.$ The %VLF power of HRV was $34.5{\pm}3.7\; %$ at rest and showed no significant change during exercise except for a decrease observed at the highest intensity of exercise. The %LF power was $44.1{\pm}3.0\;%$ at rest and showed a progressive decrease down to $4.5{\pm}1.0\;%$ during those stages of exercise where heart rate was over 135 beats/min. The %HF power was $21.4{\pm}2.9\;%$ at rest and showed a progressive increase up to $87.1{\pm}6.7\;%$ during higher intensity exercise where heart rate was over 165 beats/min. Peak frequency of HF band was $0.200{\pm}0.018\;Hz$ at rest and was shifted to higher frequencies up to $0.909{\pm}0.048\;Hz$ at heart rates greater than 135 beats/min. Respiratory frequency was $18.0{\pm}1.5$ breaths/min at rest and significantly increased during exercise up to $53.0{\pm}3.7$ breaths/min. Stride frequency during treadmill exercise showed an increasing tendency with increasing speed from $55.6{\pm}0.9$ steps/min at 4.02 km/h to $81.2{\pm}0.6$ at 8.05 km/h. It was concluded that total power of HRV decreased progressively with increasing exercise intensity due to the withdrawal of parasympathetic activity. At higher exercise intensity, % LF power decreased and %HF power increased with its peak frequency shifted to higher values in a progressive mode with increasing speed and grade, reflecting a readjustment in the cardiovascular system and the increased respiration and its rate, respectively.

• 한국응용과학기술학회지
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• 제40권3호
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• pp.476-483
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• 2023

본 연구의 목적은 여자 대학생 태권도 선수들의 선수 경력, 대회 참가빈도가 운동몰입에 미치는 영향을 분석하는 데 있다. 본 연구의 대상은 여자 대학 태권도 선수 20명이다. 선수 경력과 대회 참가빈도는 4점 척도로 조사하였고, 1점에서 4점으로 점수가 높으면 높을수록, 선수 경력과 대회 참가빈도가 높음을 의미한다. 운동몰입에 대한 평가는 운동몰입척도를 활용하였다. 운동몰입척도는 총 8문항으로 행위 몰입 4문항과 인지 몰입 4문항으로 구성되어있고, 5점 리커트 척도를 활용하여 평정하며, 점수가 높으면 높을수록 운동몰입 수준이 높음을 의미한다. 그 결과 대회 참가 빈도와 운동몰입 간에 정적 (+) 상관관계와 인과관계가 나타났다. 선수 경력은 부적 (-) 인과관계를 보였다. 이러한 결과는 대회 참가빈도가 높을수록 운동몰입 수준이 증가하며, 선수 경력이 길수록 운동몰입 수준이 감소한다고 설명할 수 있다. 따라서, 여자 대학 태권도 선수들의 운동몰입 수준을 향상시키기 위해 대회 참가 빈도와 선수 경력을 고려해야 할 것이다.

• 한국컴퓨터정보학회논문지
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• 제23권6호
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• pp.51-58
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• 2018

This study was conducted to investigate the relationship between drinking, smoking, meat intake, and exercise. The participants were 1,060 males and females who voluntarily responded to the survey by visiting the health promotion booth at the H Festival held in C city in 2014. Research data were collected in interview form using questionnaires on alcohol use, smoking, exercise, and meat intake. The data were analyzed by descriptive analysis, cross tabulation analysis, multinominal logistic regression after stratification of gender using the SPSS 24 program. The results of the study are as follows: Smokers had a significantly higher frequency of drinking ($x^2=163.33$, p<.001) than non-smokers. Meat intake was high when alcohol use was high ($x^2=35.13$, p<.001). The risk rates for smoking, meat consumption, and exercise related to alcohol use are as follows. The smoking was higher as the frequency of drinking increased. For men, smoking OR(odd ratio) was 6.26 (p=.001) and for women, smoking risk OR was 16.82 (p=.002). Meats intake showed a higher OR as the alcohol use increased. The OR of almost daily ingestion of meat at frequent drinking days was 4.40 (p=.002) for males and 4.52(p=.009) for females. As the frequency of drinking increased, the OR of days of exercise tended to decrease. In men, the OR was 0.36 (p=.003), the lowest in the probability of exercising more than 5 days when drinking high. In the case of women drinking less than once a week, the OR was 0.43 (p=.027), which was the lowest for exercise for 5 days or more. In conclusion, the higher the frequency of drinking, the higher the smoking and meat intake, and the less exercise. If drinking, smoking, and meat intake are high but there is a lack of exercise, a chronic disease can occur and cause premature death unless there is a change in the new health behavior. The results of this study suggest researches to understand the motives related to alcohol abstinence, smoking cessation, dietary control and exercise, and to develop programs.

• 대한물리의학회지
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• 제4권3호
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• pp.141-148
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• 2009

Purpose：The purpose of this study was analyze the effect combination exercise program on plasma total antioxidant capacity and free oxygen radical according to exercise frequency of elderly. Age range of subject is 65~70 years. Methods：Subjects divided into three groups: control group(0-time), week-3 times group(3-times), week-5 times group(5-times). Each group were performed combination exercise during 8 weeks. Results：The results of each group by ANOVA free oxygen radical have a change(p<.05). We performed comparison of total antioxidant capacity and free oxygen radical pre-test and post-test on each groups. Total antioxidant capacity was increased in the 3-times and 5-times groups but there have not significant. Total antioxidant capacity is improve better than to 5-times. Free oxygen radical is significant increased in the 0-time (p<.05). But 5-times but 3-times is no significant decrease. Free oxygen radical is improve better than to 3-times. Conclusion：In the old people, exercise frequency week 3 times doing appeared effectively in improvement of the free oxygen radical and 5 times doing appeared effectively in improvement of the total antioxidant capacity. So rightly must apply a exercise frequency well in characteristic of old person each person.

• Journal of Electrical Engineering and Technology
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• 제3권4호
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• pp.576-583
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• 2008

In this study, we attempt to design a real-time autonomic nervous system(ANS) evaluation system usable during exercise using heart instantaneous frequency(HIF). Although heart rate variability(HRV) is considered to be a representative signal widely used ANS evaluation system, the R-peak detection process must be included to obtain an HRV signal, which involves a high sampling frequency and interpolation process. In particular, it cannot accurately evaluate the ANS using HRV signals during exercise because it is difficult to detect the R-peak of electrocardiogram(ECG) signals with exposure to many noises during exercise. Therefore, in this study, we develop the ground for a system that can analyze an ANS in real-time by using the HIF signal circumventing the problem of the HRV signal during exercise. First, we compare the HRV and HIF signals in order to prove that the HIF signal is more efficient for ANS analysis than HRV signals during exercise. Further, we performed real-time ANS analysis using HIF and confirmed that the exerciser's ANS variation experiences massive surges at points of acceleration and deceleration of the treadmill(similar to HRV).

• 성인간호학회지
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• 제14권3호
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• pp.418-427
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• 2002

Purpose: The Purpose of this research was to develop the integrative exercise program for the elderly. Method: The first step was to survey the elder's health status and general health problems. The second step was to design the exercise type, intensity, time and frequency. Result: 1. Elders who implement the integrative exercise program had weaker health status, lower physical performance and more depression than any other places. 2. The integrative exercise program developed the preparation stage composed of stretching and Yudongkong-Ki exercise, the central stage was composed of range of motion exercise, muscle strength exercise and aerobic exercise with favorite and popular Korean music. The finishing stage was composed of joint rounding and Yudongkong-Ki exercise. The exercise intensity was RPE(rating perceived exertion) 10-11, maximal pulse rate 40-60%, duration started from 20min to 50min and frequency is 2-3times/wk. Conclusion: The integrative exercise program developed by the researcher is tailored exercise that is more applicable to individual cases in community settings. Eventually, the program is safely applicable to the elders, and is expected to improve the elders' physical function and quality of life.