https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/852 2026-07-03T21:01:08Z 2026-07-03T21:01:08Z Zhao, Fangyu Peng, Xuemin Zhuang, Yongbin Liu, Yaowen Chen, Jiaxuan Ji, Fujue Lee, Seong-no https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/212488 2026-05-04T02:30:24Z 2026-06-01T00:00:00Z

Title: Associations of physical activity intensity with the non–high-density lipoprotein to high-density lipoprotein cholesterol ratio and mortality in middle-aged and older adults: New evidence from China Authors: Zhao, Fangyu; Peng, Xuemin; Zhuang, Yongbin; Liu, Yaowen; Chen, Jiaxuan; Ji, Fujue; Lee, Seong-no Abstract: Background: The non-high-density lipoprotein to high-density lipoprotein cholesterol ratio (NHHR) has emerged as a comprehensive lipid index reflecting the balance between atherogenic and anti-atherogenic lipoproteins. However, evidence on how different intensities and durations of physical activity (PA) influence NHHR remains scarce, particularly in aging populations. Methods: Data were obtained from China Health and Retirement Longitudinal Study. PA was self-reported and categorized as high- (HPA), moderate- (MPA), or low-intensity (LPA). Multivariable linear regression models assessed associations between PA and NHHR, with subgroup, sensitivity, and dose-response analyses further exploring robustness. Cox regression and mediation analyses examined the associations of PA and NHHR with 10-year all-cause mortality. Results: Higher levels of total, moderate-, and high-intensity PA were significantly associated with lower NHHR. The results were generally consistent with a graded pattern, with lower NHHR observed at higher activity durations, particularly for moderate-to-vigorous activity. Exploratory mediation analyses suggested that NHHR may partially account for the inverse association between PA and mortality. Conclusions: This study adds large-scale, population-based evidence on the associations between different PA intensities and NHHR. Regular moderate-to-vigorous PA is associated with more favorable lipid profiles and lower mortality risk. These findings highlight NHHR as a valuable biomarker linking physical activity to cardiometabolic health and longevity in middle-aged and older adults.

2026-06-01T00:00:00Z Li, Jiaqi Lee, Seongno https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/211885 2026-04-02T02:30:29Z 2026-06-01T00:00:00Z

Title: Biomechanical analysis of Tai Chi gait and lower limb joint stability: impact on balance control Authors: Li, Jiaqi; Lee, Seongno Abstract: Background Although Tai Chi has demonstrated efficacy in improving balance and preventing falls, the underlying biomechanical mechanisms remain incompletely understood. Objectives This study aimed to examine biomechanical mechanisms associated with Tai Chi practice in relation to lower limb joint stability and balance control Methods A cross-sectional comparative study enrolled 64 participants aged 55-70 years (32 long-term Tai Chi practitioners and 32 age-matched controls). Comprehensive biomechanical assessments included 3D motion capture (200 Hz), force plate measurements (2000 Hz), 16-channel surface electromyography, and standardized balance tests. Primary outcomes were joint stability indices, center of pressure parameters, and balance performance scores. Multiple regression and mediation analyses identified relationships between joint stability mechanisms and balance outcomes. Results Compared to controls, Tai Chi practitioners demonstrated significantly greater ankle dynamic stiffness (23.8 +/- 2.4 vs. 19.5 +/- 2.8 Nm/kg/rad, p < 0.001, d = 1.72), enhanced hip-knee coordination (0.78 +/- 0.06 vs. 0.65 +/- 0.09, p < 0.001, d = 1.63), and 32.1% higher neuromuscular efficiency at the ankle joint. These adaptations correlated strongly with superior balance performance, including 32.3% smaller center of pressure excursion area during single-leg stance (p < 0.001) and 36.2% faster time-to-stabilization after perturbations (p < 0.001). Mediation analysis revealed that ankle proprioceptive acuity and dynamic joint stiffness regulation accounted for 58.4% of the relationship between Tai Chi experience and balance performance. Conclusions Long-term Tai Chi practice is associated with specific neuromuscular adaptations characterized by proximal-to-distal muscle activation sequencing, selective joint stiffness modulation, and enhanced anticipatory postural adjustments. These biomechanical mechanisms provide evidence-based foundations for optimizing Tai Chi training protocols and integrating Tai Chi principles into fall-prevention and rehabilitation programs.

2026-06-01T00:00:00Z 김정석 박성배 https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/217804 2026-07-02T06:00:18Z 2026-05-01T00:00:00Z

Title: 위계적 다중회귀분석을 통한 이스포츠 국가 대항전 팬덤 태도 형성에 관한 연구: 자기결정성 이론을 중심으로 Authors: 김정석; 박성배 Abstract: 본 연구는 국가 대항 이스포츠 이벤트를 시청한 국내 팬 297명을 대상으로 국가 정체성과 디지털 정체성이 자기결정성 이론의 내재적·외재적 동기 구조와 기본 심리 욕구(자율성, 유능감, 관계성)를 통해 이벤트 태도(시청·구매·구전 의도)에 미치는 영향을 위계적 다중회귀분석으로 검증하였다. 분석 결과, 시청 의도에서는 국가 정체성_내재(β = .379, p < .001)와 디지털 정체성_내재(β = .077, p < .05)가 압도적인 영향력을 보였으며, 내재·외재 동기 상호작용은 부(−)의 효과(β = −.080, p < .05)를 나타냈다. 구매 의도에서는 PC 게임 이용 시간(β = .091), 국가 정체성_내재(β = .227), 디지털 정체성_외재(β = .160), 관계성(β = .318)이 핵심 예측 요인으로 확인되었다. 구전 의도에서는 여성 팬(β = −.075), 모바일 게임 이용 시간(β = .072)과 함께 내재적·외재적 정체성 요인 및 유능감(β = .205), 관계성(β = .260)이 영향을 미쳤다. 수정된 R²는 시청 .673, 구매 .575, 구전 .669로 우수한 설명력을 보였으며, 9개 가설 중 7개가 완전히 지지되고 2개가 부분 지지되었다. 본 연구는 이스포츠 국가 대항전에서 내재적 동기와 기본 심리 욕구의 충족이 태도 형성을 주도하되 외재적 요인이 행동 유형에 따라 차별적 역할을 수행함을 보여준다. 실무적으로 경기 콘텐츠의 자율적 시청 환경 강화, 디지털 정체성 기반 굿즈 설계, 여성·모바일 사용자 대상 맞춤형 캠페인 전략 등을 제안한다.; This study examined the impact of national identity and digital identity on event attitudes (viewing intention, purchase intention, word-of-mouth intention) toward national esports events through the intrinsic/extrinsic motivation structure of Self-Determination Theory and basic psychological needs (autonomy, competence, relatedness), using hierarchical multiple regression analysis on 297 domestic fans who watched national esports events. The results showed that for viewing intention, national identity_intrinsic (β = .379, p < .001) and digital identity_intrinsic (β = .077, p < .05) had dominant effects, while the intrinsic-extrinsic interaction showed a negative effect (β = −.080, p < .05). Purchase intention was predicted by PC gaming time (β = .091), national identity_intrinsic (β = .227), digital identity_extrinsic (β = .160), and relatedness (β = .318). Word-of-mouth intention was influenced by female fans (β = −.075), mobile gaming time (β = .072), both intrinsic and extrinsic identity factors, competence (β = .205), and relatedness (β = .260). Adjusted R² values were .673 (viewing), .575 (purchase), and .669 (word-of-mouth), demonstrating strong explanatory power. Of the nine hypotheses tested, seven were fully supported and two were partially supported. The findings indicate that intrinsic motivation and basic psychological need satisfaction primarily drive attitude formation in national esports events, while extrinsic factors play differentiated roles depending on behavior type. Practical implications include strengthening autonomous viewing environments for game content, designing merchandise that leverages digital identity, and developing targeted campaigns for female and mobile users.

2026-05-01T00:00:00Z Qiu, Jiadong Wang, Jian Song, Xiongying Shu, Wanyu Kim, Sung Min https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/212778 2026-05-20T06:30:28Z 2026-04-01T00:00:00Z

Title: Dose-Related Effects of Different Tai Chi Styles Versus Traditional Community-Based Exercises on Cardiometabolic Health and Physical Function in Middle-Aged and Older Adults: Randomized Controlled Trial Authors: Qiu, Jiadong; Wang, Jian; Song, Xiongying; Shu, Wanyu; Kim, Sung Min Abstract: Background: Age-related declines in metabolic, cardiovascular, and physical function contribute to reduced quality of life in older adults. Although structured exercise is central to healthy aging, the optimal modality remains unclear. Community-based exercise programs in China are heterogeneous, and their comparative effects on health outcomesand cardiovascular safety have not been systematically evaluated. Objective: We aimed to compare the effects of 4 common community-based exercise modalities on cardiometabolic health, physical function, and quality of life in middle-aged and older adults, and to assess their relative efficacy and safety across intervention exposure. Methods: This single-blind randomized controlled trial included 113 middle-aged and older adults (mean age 62.3, SD 4.25 years). Participants were assigned to one of the 5 groups: 12-form Chen-style Tai Chi (CTC12), 24-form Tai Chi, square dance, walking, or a control group. The 12-week intervention comprised 2 supervised sessions per week, each lasting 90 minutes. Pre-and postintervention assessments included blood pressure, lipid profiles, fasting glucose, interleukin-6 levels, Short Physical Performance Battery (SPPB) scores, activities of daily living, and the World Health Organization Quality of Life (WHOQOL) index. Results: The CTC12 and square dance groups showed significant improvements in several outcomes. In the CTC12 group, triglyceride and low-density lipoprotein cholesterol levels significantly decreased (P=.008 and P=.002, respectively), whereas SPPB and WHOQOL scores significantly improved (P=.02 and P=.002, respectively). In the square dance group, total cholesterol, triglyceride, and low-density lipoprotein cholesterol levels significantly decreased (P=.01, P=.002, and P=.002, respectively), whereas SPPB, activities of daily living, and WHOQOL scores significantly improved (P=.04, P=.04, and P=.002, respectively). The walking group showed a significant improvement only in WHOQOL scores (P=.02). No significant changes were observed in the control group for any outcome. Conclusions: CTC12 and square dance were associated with significant improvements in cardiometabolic, physical, and psychological health outcomes in middle-aged and older adults. CTC12 demonstrated broader multidimensional benefits, potentially reflecting the integration of physical, respiratory, and cognitive components. These modalities may represent safe and scalable strategies for promoting healthy aging in community settings. Trial Registration: Chinese Cl i ni cal Trial Registry Chi CTR 2 4 0 0 0 9 2 4 7 3 ; https://www.chictr.org.cn/showprojEN.html?proj=249330

2026-04-01T00:00:00Z