Repository Community:

Effects of Acute Exercise Bouts on Cardiovascular Biomarkers in Runners with Exercise-Induced Hypertension

2025-06-30T15:00:00Z

Title: Effects of Acute Exercise Bouts on Cardiovascular Biomarkers in Runners with Exercise-Induced Hypertension Author(s): 김영주; Han-Soo Park; Sang-Hyun Nam; Sang-Hoon Kim; So-Eun Lee; Jae-Hee Choi; Yong-Bum Park; Jin-Ho Yoon Abstract: Exercise-induced hypertension (EIH) has increasingly been observed among middle-aged long-distance runners, raising concerns about cardiovascular risk. This study aimed to investigate acute changes in cardiovascular biomarkers associated with vascular inflammation, oxidative stress, antioxidant defense, endothelial function, and myocardial burden in runners with EIH. Thirty-seven middle-aged male runners (aged 40-65 years) were categorized into a normal blood pressure group (NBPG; systolic blood pressure <210 mmHg, n = 23) and an EIH group (EIHG; ≥210 mmHg, n = 14) based on maximal systolic blood pressure during a graded exercise test (GXT). Participants performed a 30 min treadmill run at 80% heart rate reserve, and blood samples were collected before and after exercise. The biomarkers analyzed included high-sensitivity C-reactive protein (hs-CRP), derivatives of reactive oxygen metabolites (d-ROMs), biological antioxidant potential (BAP), nitric oxide (NO), superoxide dismutase (SOD), and N-terminal pro-brain natriuretic peptide (NT-proBNP). The results show that the EIHG exhibited increased NT-proBNP and SOD levels, along with a reduced NO response, indicating elevated myocardial stress and impaired vasodilation. hs-CRP was positively correlated with multiple hemodynamic indices, and SOD levels were associate

Blood Flow Restriction Training as a Non-Pharmacologic Therapy with Exercise-Induced Hypertension

2025-06-22T15:00:00Z

Title: Blood Flow Restriction Training as a Non-Pharmacologic Therapy with Exercise-Induced Hypertension Author(s): 김영주; Ick-Mo Chung; Choung-Hwa Park; Jong-Young Lee Abstract: Background/Objectives: Long-distance runners with exercise-induced hypertension (EIH) are at increased risk for cardiovascular complications. Although blood flow restriction (BFR) training has shown promise in improving vascular function, hemodynamic response, and cardiorespiratory fitness, its effects in EIH runners remain understudied. This study aimed to evaluate the effects of BFR training on cardiovascular responses and exercise performance in this population as a potential non-pharmacological therapy. Methods: Middle-aged male long-distance runners aged 40–65 with peak systolic blood pressure (SBP) ≥ 210 mmHg during graded exercise testing were randomly assigned to either a BFR group (n = 18) or a non-BFR control group (n = 15) using a computer-generated random sequence. There were no significant differences in baseline characteristics between the groups. Both groups performed aerobic training at 40–60% HRR for 20 min twice weekly for 8 weeks. SBP, diastolic blood pressure (DBP), rate pressure product (RPP), ventilatory threshold (VT), VO₂max, and perceived exertion were assessed before and after the intervention at rest, during exercise, and during recovery. Results: Compared to the non-BFR group, the BFR group showed statistically significant reductions in resting and maximal SBP and DBP (p < 0.05), alon

Analysis of sleep duration, energy intakes, physical activity, and metabolic syndrome based on the presence or absence of obesity and hypertension in working Korean adults

2025-07-29T15:00:00Z

Title: Analysis of sleep duration, energy intakes, physical activity, and metabolic syndrome based on the presence or absence of obesity and hypertension in working Korean adults Author(s): 성은숙; 박종훈; 김상후; 이영준 Abstract: Background: Metabolic syndrome poses a serious public health concern among working adults, especially in the context of increasing rates of obesity and hypertension. These lifestyle-related conditions are intricately linked to sleep patterns, dietary behaviors, and physical activity. Objective: This study aimed to examine how sleep duration, energy intake, and physical activity levels—key lifestyle factors—are associated with metabolic syndrome based on the presence or absence of obesity and hypertension among working Korean adults. Methods: We analyzed 6,503 working Korean adults aged 20–59 years using cross-sectional data from the Korea National Health and Nutrition Examination Survey covering 2016–2018. This study divided the participants based on their obesity and hypertension status. We assessed the participants’ sleep duration on weekdays and weekends, their total dietary energy consumption and macronutrient intake using a 24-h dietary recall method conducted by trained interviewers, and occupational and recreational physical activities, and movement levels in MET min/week. We evaluated metabolic syndrome components using standard criteria and examined between-group differences using two-way analysis of variance and Bonferroni post-hoc tests. Results: Individuals with hypertension had significantly shorter weekday sleep (p < 0.05) and weekend sleep durations (p < 0.001) than those without. The highest total energy intake was significantly higher in obese individuals with hypertension than in those without hypertension (p < 0.05) and non-obese individuals with hypertension (p < 0.001). Furthermore, obese individuals with hypertension showed higher levels of occupational vigorous and total physical activities than those without hypertension (p < 0.01 and p < 0.001, respectively), whereas no difference was observed between obese and non-obese individuals with hypertension. Conclusion: This study concludes that hypertension and obesity may reinforce each other through reduced sleep duration, lower physical activity levels, and increased energy intake, thereby exacerbating metabolic syndrome. To prevent metabolic syndrome in working adults, multiple aspects of sleep, nutrition, and physical activity that match their unique risk profiles must be considered.

인공지능(AI) 기술에 대한 중고령층 소비자의 긍정적, 부정적 인식과 영향요인 분석

2025-06-29T15:00:00Z

Title: 인공지능(AI) 기술에 대한 중고령층 소비자의 긍정적, 부정적 인식과 영향요인 분석 Author(s): 차경욱; 구윤혜; 구지연 Abstract: 본 연구는 인공지능(AI) 기술에 대한 중고령층 소비자의 인식을 파악하고, 이에 영향을 미치는 요인을 분석하 였다. 중고령층 소비자의 사회경제적 특성과 디지털 역량이 AI 기술에 대한 긍정적, 부정적 인식에 어떠한 영향을 미치는지 규명하고, 그 영향력이 AI 서비스 이용경험 의해 조절되는지 검증하였다. 분석자료는 2023년 디지털정 보격차 실태조사 원자료이고, 만 55세 이상 응답자 중 인터넷과 스마트폰을 이용하는 1,905명으로 분석대상으로 하였다. 주요 연구결과는 다음과 같다. 첫째, 중고령층 소비자의 연령, 교육수준, 월평균가구소득에 따라 AI 기술에 대한 긍정적, 부정적 인식 모두 유의한 차이가 나타났다. 둘째, AI 기술에 대한 긍정적 인식은 중고령층 소비자의 디지털기술 활용역량, 디지털 기술에 대한 태도, 디지털기기 이용효능감에 따라 유의한 차이가 나타났다. 부정적 인식은 디지털기술 활용역량, 디지털기술에 대한 태도에 따라 유의한 차이가 나타났다. 셋째, 중고령층 소비자의 연령이 증가할수록, 중졸 이 하보다는 고졸일 때, 월평균가구소득이 높을수록, 디지털기술 활용역량이 높을수록, 디지털기술에 대한 태도가 호의적일수록 AI 기술에 대한 긍정적 인식이 높아졌다. AI 서비스 이용경험의 조절효과는 디지털기술 활용역량 에서만 나타났다. 넷째, 연령이 증가할수록, 디지털기기 이용효능감이 높을수록 AI 기술에 대한 부정적 인식은 감 소했고, 디지털기술 활용역량이 높을수록, 디지털기술에 대한 태도가 호의적일수록 AI 서비스에 대한 부정적 인식 도 증가했다. 조절변수로 투입된 AI 서비스 이용경험 유무 변수도 통계적으로 유의했고, AI 서비스 이용경험의 조절효과는 디지털기술에 대한 태도와 디지털기기 이용효능감에서 나타났다.