• 대한물리의학회지
• /
• 제17권1호
• /
• pp.31-39
• /
• 2022

PURPOSE: This study examined the changes in the blood fatigue variables caused by isokinetic and isotonic exercise training. METHODS: Ten healthy adult males with at least one year of athletic experience participated. The participants performed the isokinetic circuit exercise program first, followed by an isotonic circuit exercise program. A two-hour break was allowed between the isokinetic circuit exercise program and the isotonic circuit exercise program. The circuit exercise program consisted of four items (Squat, Deadlift, Shoulder press, and Bench press). The blood samples were analyzed for the LDH, CPK, and Cortisol levels. RESULTS: The LDH level in the isokinetic group was significantly different from the isotonic group. In particular, the change in LDH level in the isokinetic group was 33.30% lower than that of the isotonic group. The serum CPK level of the isokinetic group showed a 10.03% lower decrease than the isotonic group, but the difference was not significant. The Cortisol level was relatively unchanged in the isotonic group, but it decreased in the isokinetic group. On the other hand, the Cortisol level did not show a significant difference between the two groups. CONCLUSION: The isokinetic group showed alleviation of the three indices, unlike the isotonic group. Further studies associated with the changes in blood fatigue variables through various exercise programs and exercise intensity will be needed.

• Asian-Australasian Journal of Animal Sciences
• /
• 제20권11호
• /
• pp.1761-1769
• /
• 2007

This experiment was conducted to determine the extent to which susceptibility to cortisol-induced follicle shutdown is influenced by fleece phentotype. Twenty Finewool (10 sheep low fibre diameter, low coefficient of fibre diameter-LL and 10 low fibre diameter, high coefficient of variation of fibre diameter-LH) and twenty Strongwool (10 low fibre diameter, low coefficient of variation of fibre diameter-HL and 10 high fibre diameter and high coefficient of variation of fibre diameter-HH) sheep of 9 months of age were individually penned in an animal house and were injected intramuscularly with an aqueous suspension of hydrocortisone acetate at a rate of 1.42 mg/kg body weight for a period of two weeks. Fibre diameter was measured from clipped tattooed patch wool samples. Follicle activity was measured by histological changes in skin biopsies taken weekly. Blood samples were collected at two-week intervals and plasma cortisol measured. Increased plasma cortisol concentration significantly (p<0.05) reduced clean wool production and mean fibre diameter dropped to its lowest level four weeks after commencement and two weeks after the cessation of cortisol injection. Elevation of plasma cortisol concentration significantly (p<0.0001) increased the percentage of inactive follicles two weeks after injection started. High fibre diameter groups (Strongwool sheep; i.e. HL+HH) had significantly (p<0.0001) higher percentage of follicle shutdown than low fibre diameter groups (Finewool sheep; i.e. LL+LH). Average percentage of shutdown follicles for Finewool (LL+LH) and Strongwool (HL+HH) Merino sheep was $9.8{\pm}0.9$ and $13.5{\pm}0.9$ respectively. Shutdown of primary follicles was more pronounced in Finewool than Strongwool sheep. There was no significant effect of coefficient of variation of fibre diameter on propensity to follicle shutdown induced by exogenous cortisol. It is concluded that elevation in plasma cortisol concentration is inhibitory to the normal activity of follicles in Strongwool sheep but that variation in fibre diameter has little or no effect.

• 대한통합의학회지
• /
• 제6권3호
• /
• pp.11-16
• /
• 2018

Purpose: Stress tends to cause sympathetic hyperactivity and increase blood cortisol levels. The vagus nerve is a parasympathetic nerve that is involved in relaxing the body. The purpose of this study was to investigate the effects of electrical stimulation of the vagus nerve on stress hormone (cortisol) levels and heart rate variability (HRV) in humans. Methods: A total of 10 healthy subjects participated in the pilot experiment. All subjects underwent electrical vagus nerve stimulation for 20 minutes in the cymba conchae of the left ear. An electro cardiogram meter was used to measure HRV. Blood samples were collected and analyzed for cortisol levels. The standard deviation of all normal N-N intervals (SDNN), root mean square of successive differences (RMSSD), low frequency, high frequency, and cortisol levels were compared in pre and post mean values after the intervention. Data were analyzed using the Wilcoxon's signed-rank test. Results: Coritsol levels were observed to decrease after vagus nerve electrical stimulation. The mean SDNN and RMSSD values were increased after the intervention, but not significantly. Conclusion: Vagus nerve electrical stimulation has been shown to increase the ability of the parasympathetic nerve to adapt to upward regulation and stress. Vagus nerve electrical stimulation could thus be an effective treatment for modern social psychological stress control.

• The Korean Journal of Pain
• /
• 제27권1호
• /
• pp.30-34
• /
• 2014

Background: Myofascial pain dysfunction syndrome (MPDS), otherwise called myofascial pain is one of the most common temporomandibular disorders, which in turn is the most common cause of orofacial pain of non-dental origin. Its etiology is multifactorial and still poorly understood. Psychological factors have been shown to play a role in the etiology. The aim of the study was to evaluate the association between anxiety and salivary cortisol levels in patients with myofascial pain. Methods: Twenty patients suffering from myofascial pain were recruited as the study group. The same number of age and sex matched healthy individuals were taken as the control group. The salivary samples collected between 9-9:15 am from both groups were analyzed for cortisol levels with the competitive enzyme-linked immunosorbent assay method. Anxiety levels of 40 patients were measured using Hamilton's anxiety scale. Results: The mean serum cortisol level of the MPDS group showed a highly significant difference (P < 0.001) from the controls. The mean anxiety scores of the MPDS group showed a highly significant difference (P < 0.001) from the controls. A positive correlation was found between anxiety and the salivary cortisol levels in MPDS patients. Conclusions: These findings suggest that anxiety plays a vital role in the etio-pathogenesis of MPDS; thus, besides pharmacological treatment, psychological support is also needed.

• Asian-Australasian Journal of Animal Sciences
• /
• 제7권3호
• /
• pp.397-400
• /
• 1994

The effect of xylazine administration on plasma cortisol, prolactin, glucose and packed cell volume (PCV) responses to immobilization and heat stress was investigated. Immobilization of rats for 2 hours by ligation of the fore and hind legs strongly caused approximately two-fold increase in plasma cortisol and prolactin levels. Plasma glucose and PCV were not significantly changed. Pretreatment of immobilized rats with xylazine (20 mg/kg body weight i.m.) resulted in approximately 20% reduction in both plasma cortisol and prolactin concentrations. A marked hyperglycemia and increase in the PCV value was observed. On the other hand, rats exposed to acute heat stress ($40^{\circ}C$, and 60% relative humidity) for 2 hours, also developed two fold increase in both plasma cortisol and prolactin concentrations and the pretreatment with xylazine caused a 20% reduction in the levels of both hormones. Plasma glucose level was not significantly changed in heat stressed rats but it was markedly increased after pretreatment with xylazine. PCV was significantly incrcased under heat stress and pretreatment with xylazine induced a pronounced elevation in this value. It was suggested that stimulation of cortisol and prolactin secretion in response to immobilization or heat stress can be partially reduced by an alpha 2-adrenergic agonist.

• Safety and Health at Work
• /
• 제2권2호
• /
• pp.169-175
• /
• 2011

Objectives: The questionnaire of occupational stress index (OSI) has been popular in the workplace, and it has been tailored for bus drivers in Taiwan. Nevertheless, its outcomes for participants are based on self-evaluations, thus validation by their physiological stress biomarker is warranted and this is the main goal of this study. Methods: A cross-sectional study of sixty-three city bus drivers and fifty-four supporting staffs for comparison was conducted. Questionnaire surveys, 24-hour urine cortisol testing, and blood draws for dehydroepiandrosterone-sulfate (DHEA-S) testing were performed. The measured concentrations of these biological measures were logarithmically transformed before the statistical analysis where various scores of stressor factors, moderators, and stress effects of each OSI domain were analyzed by applying multiple linear regression models. Results: For drivers, the elevated 24-hour urine cortisol level was associated with a worker's relationship with their supervisor and any life change events in the most recent 3 months. The DHEA-S level was higher in drivers of younger age as well as drivers with more concerns relating to their salary and bonuses. Non-drivers showed no association between any stressor or satisfaction and urine cortisol and blood DHEA-S levels. Conclusion: Measurements of biomarkers may offer additional stress evaluations with OSI questionnaires for bus drivers. Increased DHEA-S and cortisol levels may result from stressors like income security. Prevention efforts towards occupational stress and life events and health promotional efforts for aged driver were important anti-stress remedies.

• 스트레스연구
• /
• 제27권2호
• /
• pp.199-204
• /
• 2019

본 연구는 불안민감도가 과제수행과 스트레스 반응에 미치는 영향을 살펴보고, 이 과정에 우울감은 어떠한 영향을 미치는지 확인하였다. 참가자들은 제한된 시간에 암산 문제를 완수하였고, 불안민감도지수와 우울증 선별도구에 응답하였다. 더불어, 실험 전후 참가자들의 코르티졸(Cortisol) 변화량을 확인하였다. 그 결과, 불안민감도가 높은 사람은 과제수행의 정확도가 떨어지고 코르티졸 수치가 유의미하게 상승하였다. 또한, 불안민감도와 우울감이 모두 높은 참가자들이 코르티졸 수치가 가장 크게 상승하였다. 본 연구는 자기보고식 응답에 근거하여 임상증상을 기술하는 것을 넘어 과제수행의 정확도와 생화학적 지표를 함께 제시함으로써, 보다 안정적으로 개인의 불안민감도와 우울감의 관계를 논의하였다는 의의를 지닌다.

• Journal of Hospice and Palliative Care
• /
• 제18권2호
• /
• pp.105-111
• /
• 2015

목 적: 치료 불가능한 암환자에서는 암으로 인한 전신적 쇠약 이외에 피로와 에너지 상실, 무력감, 식욕부진 및 통증 등이 공통적으로 나타나는 주요 증상으로 알려져 있으며 이러한 증상은 부신 기능 부전이 있을 때 나타나는 증상과 유사한 점이 많다. 또한 말기암환자의 통증은 중등도 이상이기 때문에 대부분 마약성 진통제로 조절하고 있는 경우가 많다. 본 연구에서는 마약성 진통제와 부신 기능 부전에 대한 관계를 알아보고자 한다. 방법: 2013년 11월부터 2014년 6월까지 7개월 동안, 만 18세 이상의 말기암환자 55명을 대상으로 혈장 cortisol, DHEAS 등을 측정하였다. 또한 환자의 마약성 진통제의 사용 기간 및 용량도 함께 조사하였고 마약성 진통제의 사용 기간 및 용량과 부신 기능을 대표할 수 있는 혈장 cortisol, DHEAS의 농도를 각각 비교하였다. 결과: Cortisol의 평균값은 $20.24{\mu}g/dL$, DHEAS의 평균값은 $44.41{\mu}g/dL$였으며, 상관 분석 결과 DHEAS와 마약성 진통제의 사용 기간 및 용량과의 관계는 통계적으로 유의한 수준의 관련성이 없었고, Cortisol의 경우 마약성 진통제의 사용 기간과는 유의한 관련성이 없었으나, 진통제의 사용 용량이 많을수록 Cortisol의 수치가 유의하게(P-value 0.0322) 상승되었다. 결론: 마약성 진통제의 사용 기간 및 용량에 따른 부신 기능의 저하는 통계적으로 유의한 연관성을 보이지 않았으나 진통제를 사용하고 있는 말기암환자들의 부신 기능을 대표할 수 있는 지표인 DHEAS 값은 대부분 정상 이하로 낮아져 있는 모습을 보였다.

• 정신신체의학
• /
• 제10권2호
• /
• pp.130-141
• /
• 2002

스트레스가 위장관 기능을 변화시키며 이에는 interleukin과 시상하부-뇌하수체-부신피질 축이 관여한 다고 알려져 있다. 한편 우울증이 기능성 위장관 장애 및 interleukin과 연관성을 지닌다. 본 연구에서는 IL-$1\beta$, IL-2, IL-6의 혈청 농도를 기능성 위장관 장애 환자에서 측정하고, 혈청 cortisol 및 우울증과 스트레스의 정도를 조사하여 기능성 위장관 장애에 있어서 interleukin의 역할과 우울증 및 스트레스와의 상관성을 살펴보고자 하였다. 방법: 기능성 위장관 장애의 진단을 위한 로마기준 II에 따라 진단된 환자 20명과 건강한 대조군 20명을 대상으로 하였다. 채취한 혈액에서 혈청을 분리한 다음 Enzyme-linked Immunosorbent Assay 방법으로 혈청 IL-$1\beta$, IL-2, IL-6 농도를 측정하고 Fluorescence Polarization Immunoassay 방법으로 혈청 cortisol 농도 를 측정하였다. 우울증상의 정도를 Hamilton Rating Scale for Depression을 이용하여 평가하고, Schedule of Recent Experience를 이용하여 최근 일년간의 스트레스 생활사건의 양을 측정하여 비교하였다. 결과는 다음과 같다. 결과: 1) 기능성 위장관 장애 환자들의 혈청 IL-$1\beta$, IL-2 농도는 대조군에 비해 유의하게 낮았으나 혈청 IL-6 농도는 차이가 없었다. 2) 기능성 위장관 장애 환자군의 혈청 cortisol 농도는 대조군에 비해 유의하게 높았고, 우울증상도 유의하게 더 심하였으며, 스트레스 생활사건의 양 또한 유의하게 더 많았다. 3) 기능성 위장관 장애에서 우울증상의 정도와 혈청 cortisol 간에는 유의한 정상관관계가 있었다. 정도는 IL-$1\beta$와 역상관하는 경향이 있고, IL-2와는 정상관하였다. 스트레스 생활사건의 양파 혈청 cortisol 농도는 IL-6 와 유의하게 정상관하였다 대조군을 포함한 전 집단에서 IL-$1\beta$는 우울 정도, 스트레스 생활사건의 양, 혈청 cortisol 등과 유의하게 역 상관하였다. IL-6와 의하게 정상관하였다. 결론: 기능성 위장관 장애는 우울증 및 스트레스와 연관되며, 우울증, 스트레스가 심할수록 혈청 cortisol이 높았다. 기능성 위장관 장애 환자들에서 IL-$1\beta$, IL-2가 감소되어 있었지만, IL-6는 변화가 없었다. 상대적으로 증가된 혈청 cortisol이 IL의 변화와 관련될 수 있다고 생각된다.

• 대한의료기공학회지
• /
• 제1권1호
• /
• pp.95-109
• /
• 1996

To investigate anti-stress effects of Manual Kigong, Manual-Apparatus Combined Kikong, and Systemic Kigong, this experiments were performed changing of plasma catecholaminess and serum cortisol measured. Also using D.I.T.I(Digital Infrared Thermongraphy Imaging), Pulse Analyzer, Electric Current on Neurometer, and Digital Flicker on Testing-Stressed. And following results were abtained. 1) Menual-Appartus Combined Kikong decreased significantly increasing concentration of plasma epinephrine and norepinephrine level in Testing-stressed. 2) Manual Kigong decreased increasing concentration of serum cortisol level in Testing-stressed. 3) Manual Kigong and Manual-Aparatues Combined Kikong increased decreasing thermomerty on the palm's center caused Testing-stressed. 4) All of three treats are small change in SET(Systolic Ejection Time) by Pulse Analyzer caused Testing-stressed. 5) More changes of Electric Current on the Neurometer Diagnosis caused Testing-stressed are as followed. Manual-Apparatus Combined Kikong >Systemic Kigong >Manual Kigong From the results, it may be concluded that Manual-Apparatus Combined Kikong Theraphy having more anti-stress effects than Manual Theraphy. Systemic Kigong Therapy.