검색결과

검색조건
좁혀보기
검색필터
결과 내 재검색

간행물

    분야

      발행연도

      -

        검색결과 52,031

        801.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Fashion stress is a pertinent aspect of modern consumer culture that has been underexplored in academic research. This study developed a conceptual framework of fashion stress and a multidimensional scale to measure consumers’ fashion stress. The qualitative study included literature reviews on consumption stress, shopping stress, and consumer behavior, as well as focus group interviews to gain insight into various dimensions of fashion stress. NVivo 12.0 was used to analyze the qualitative data and identify core categories following the grounded theory methodology. The quantitative study involved a preliminary and a primary surveys to verify the validity and reliability of the fashion stress scale. A total of 220 questionnaires were used for data analysis. The results show that fashion stress consists of eight factors: care, shopping, fit, brand, financial, closet, style, and disposal. Choice difficulty plays a significant role in all factors of fashion stress. Moreover, shopping stress had a negative impact on impulse buying, while other factors such as fit, brand, closet, and disposal stress had a positive impact on impulse buying. Thus, fashion stress is a potential antecedent of impulsive consumer behavior. The results also confirm the validity and reliability of the scale. The fashion stress scale developed in this study offers researchers a valuable tool for assessing and understanding consumer experiences.
        5,200원
        802.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        기존 질병비용연구(COI)에서 환자의 여가시간 손실에 따른 경제적 영향은 상대적으로 적은 관심을 받아왔다. 또 한, 기존연구들은 주로 만성질환 또는 중질환에 초점을 맞 췄으며, 이로 인해 입원환자나 외래환자가 아닌 상대적으 로 증상이 약한 자가치료환자들에 대해서는 충분히 다루 지 못했다는 한계를 가지고 있다. 이에 본 연구에서는 자 가치료 환자들을 포함하고, 더 나아가 고용 상태와 실제 여가활동 중단 기간 등을 고려하여 식중독으로 인한 여가 손실의 연간 비용을 계산하였다. 이 과정에서 건강과 노 동에 관한 통계 자료를 활용하고, 식중독으로 인한 여가 손실을 정확히 평가하는 방법을 제시하였다. 연구 결과, 국내에서 식중독으로 인한 여가 손실에 따른 연간 경제적 비용은 약 7,845억 원(7억 2,800만 USD)으로 나타났다. 본 연구에서는 자가 치료 환자들을 포함하지 않거나 치 료 시간과 고용 상태를 고려하지 않은 경우, 여가손실비 용이 낮게 추정될 가능성을 제시하고 있다. 즉, 식중독과 같은 질병의 사회적 영향을 평가할 때 자가 치료, 고용 상태, 그리고 영향받는 전체 기간을 포함한 다양한 요소 를 고려하는 것이 중요하다는 것을 의미한다. 이 연구 결 과는 정책 결정자와 의료 전문가들에게 질병의 경제적 영 향을 보다 넓은 관점에서 이해하고, 보건의료 자원을 더 효과적으로 배분하는 데 도움이 될 수 있는 중요한 통찰 을 제공한다.
        4,000원
        803.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        In the context of a globalized society where diversity, equity, and inclusion (DE&I) have emerged as pivotal values, the fashion industry is undergoing scrutiny for its practices related to body DE&I. This study examines the nature of the discourse surrounding body DE&I within the fashion industry, focusing on how such discussions are shaped, disseminated, and manifested in both the industry and broader society. Critical discourse analysis is applied by utilizing, content from the New York Times and leveraging Fairclough’s analytical framework encompassing textual, discursive, and social practices. The findings indicate that the New York Times emphasizes diversity, with a significant focus on the shapes and sizes of women’s bodies, developing a narrative centered around women’s bodies through visible and representative domains. The analysis suggests conflicted discourse, with prevailing critiques against the fashion industry’s standardization of beauty and superficial inclusivity efforts. Moreover, the industry’s adaptation to social demands for body DE&I is observed as sporadic, often leveraging non-normative bodies as a marketing strategy rather than genuinely embracing diversity. This study highlights the importance of continuous, in-depth discourse and social practices regarding DE&I within the fashion industry, as well as the need for systemic changes and policies that genuinely reflect societal demands for inclusivity. The findings provide a foundation for future investigations into the multifaceted relationship between fashion discourse, DE&I, and social practices, advocating for a more inclusive and critically aware fashion industry.
        5,100원
        804.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        이 연구의 목적은 1) 베트남 고등학생들을 대상으로 Lee et al. (2024)에서 보고한 개정 시스템 사고 검사 도구 의 타당도를 재검증하고, 2) 연구에 참여한 우리나라 고등학생과 베트남 고등학생 간 시스템 사고 능력에 대한 차이를 알아보는 것이다. 이를 위하여 베트남 고등학생 234명이 베트남어로 번역된 개정 시스템 사고 검사 도구 20문항과 STS 척도 20문항에 응답한 자료를 활용하였다. 타당도 분석은 문항 반응 분석(Item Reliability, Item Map, Infit and Outfit MNSQ, 남녀 집단의 DIF)과 탐색적 요인 분석(프로맥스를 활용한 주축 요인 분석)을 통해 검증하고, 나아가 우 리나라 고등학생 475명의 데이터를 함께 활용하여 구조 방정식 모형을 이용한 잠재평균비교를 통해 검증하였다. 연구 결과는 다음과 같다. 첫째, 베트남어로 번역된 R e_ STMI 2 0문항의 문항 반응 분석 결과 Item Reliability는 .97, Infit MNSQ는 .67-1.38으로 나타났으며 Item Map과 DIF 분석에서도 선행 연구에서 보고된 결과와 일치하는 결과가 도출되 었다. 탐색적 요인 분석에서는 모든 문항들이 의도한 하위 요인에 적재되었으며, 요인별 신뢰도는 .662-.833, 전체 신뢰 도는 .876으로 분석되었다. 우리나라 고등학생과 잠재평균비교를 위한 확인적 요인 분석에서 도출된 모형 적합도 수치 는 모두 수용 가능한 값으로 분석되었다(χ 2 /df: 2.830, CFI: .931, TLI: .918, SRMR: .043, RMSEA: .051). 마지막으로 연구에 참여한 우리나라 고등학생과 베트남 고등학생 간 잠재평균비교에서는 시스템 분석, 정신 모델, 팀 학습, 공유 비전 요인에서 작은 효과 크기가, 개인 숙련 요인에선 중간 이상의 효과 크기를 보이며, 베트남 고등학생들이 시스템 사고 능력에서 유의미하게 높은 결과를 보여주었다. 이를 통해 개정 시스템 사고 검사 도구 문항은 안정적인 신뢰도와 타당도를 가지고 있음을 확인할 수 있었다. 앞으로 학생들의 시스템 사고 연구와 관련하여 베트남어 및 영어 등으로 번역한 문항을 활용하여 시스템 사고의 국제 비교 연구도 진행할 필요성이 있을 것이다.
        4,800원
        805.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        With the digitalization of production and consumption environments, consumers are no longer merely targets of marketing, but key players in creating value jointly with companies by participating in various decision-making processes. Much virtual content in particular, such as fashion shows, exhibitions, games, social activities, and shopping, which fashion brands implement in virtual worlds, cannot be completed without consumers’ active engagement and interaction. Thus, this study considers consumers’ participation in virtual content provided by fashion brands as value co-creation in virtual worlds. This study aims to examine how consumer (i.e., consumer smartness) and fashion firm (i.e., perceived intellectual capital) factors influence value co-creation behavior intention in virtual worlds. Data were collected from 410 consumers in their 20s nationwide through an online survey, and a higher-order structural equation modeling analysis was conducted to test the research model. The results showed that both consumer smartness and perceived intellectual capital positively influenced customer participation behavior and citizenship behavior intentions. Specifically, perceived intellectual capital had a greater impact on value co-creation behavior in the virtual world than consumer smartness. The findings provide empirical evidence that the fashion firms’ intangible assets and consumers’ competence in the digital shopping environment encourage their intentions to co-create value in virtual worlds.
        4,900원
        806.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Pure SnO2 has proven very difficult to densify. This poor densification can be useful for the fabrication of SnO2 with a porous microstructure, which is used in electronic devices such as gas sensors. Most electronic devices based on SnO2 have a porous microstructure, with a porosity of > 40%. In pure SnO2, a high sintering temperature of approximately 1300°C is required to obtain > 40% porosity. In an attempt to reduce the required sintering temperature, the present study investigated the low-temperature sinterability of a current system. With the addition of TiO2, the compositions of the samples were Sn1-xTixO2-CoO(0.3wt%)-CuO(2wt%) in the range of x ≤ 0.04. Compared to the samples without added TiO2, densification was shown to be improved when the samples were sintered at 950°C. The dominant mass transport mechanism appears to be grain-boundary diffusion during heat treatment at 950°C.
        4,000원
        807.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        In order to predict the process window of laser powder bed fusion (LPBF) for printing metallic components, the calculation of volumetric energy density (VED) has been widely calculated for controlling process parameters. However, because it is assumed that the process parameters contribute equally to heat input, the VED still has limitation for predicting the process window of LPBF-processed materials. In this study, an explainable machine learning (xML) approach was adopted to predict and understand the contribution of each process parameter to defect evolution in Ti alloys in the LPBF process. Various ML models were trained, and the Shapley additive explanation method was adopted to quantify the importance of each process parameter. This study can offer effective guidelines for fine-tuning process parameters to fabricate high-quality products using LPBF.
        4,000원
        808.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The n-type Bi2-xSbxTe3 compounds have been of great interest due to its potential to achieve a high thermoelectric performance, comparable to that of p-type Bi2-xSbxTe3. However, a comprehensive understanding on the thermoelectric properties remains lacking. Here, we investigate the thermoelectric transport properties and band characteristics of n-type Bi2-xSbxTe3 (x = 0.1 – 1.1) based on experimental and theoretical considerations. We find that the higher power factor at lower Sb content results from the optimized balance between the density of state effective mass and nondegenerate mobility. Additionally, a higher carrier concentration at lower x suppresses bipolar conduction, thereby reducing thermal conductivity at elevated temperatures. Consequently, the highest zT of ~ 0.5 is observed at 450 K for x = 0.1 and, according to the single parabolic band model, it could be further improved by ~70 % through carrier concentration tuning.
        4,000원
        809.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        This study examined whether the perceptions of the theory of planned behavior (TPB) and individual and environmental factors related to healthy eating changed after the COVID-19 pandemic among adults living in Daqing, China. Data were collected through two rounds of online surveys conducted from April to May 2021 and from March to April 2023, using a questionnaire previously validated for use in Daqing. Using the snowball sampling method, 571 adult participants were recruited, most of whom were Daqing oilfield workers or members of their families. Multiple linear regression analyses were used to determine if the differences in the perceptions of the TPB and dietary environments exist during and after the pandemic after controlling for potential confounders. Scores of several subcomponents of TPB and mean scores of longterm intentions increased but scores of subcomponents and overall mean of motivation decreased after the outbreak. Multiple linear regression showed that only motivation for healthy eating decreased after the pandemic. Influenced by the pandemic, people increased their healthy eating behaviors. Nevertheless, as the pandemic subsided and the pace of life accelerated, people tended to choose convenient foods over healthy options. Consequently, the motivation for healthy eating has declined post-pandemic compared to during the pandemic.
        4,500원
        810.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        This study aimed to develop the in vitro method using domestic commercial diets to estimate nutrient digestibility in dogs. The existing in vitro method were tested and compared with literature data to develop new in vitro method. The development of in vitro method progressed as follows: modification of pepsin solution to an activated form and supplementation with 1% lipase. All the in vitro method progressed to 4 hours of stomach simulation and 2 hours of small intestine simulation. In vivo digestibility was measured using the same diets as beagle dogs. The supplementation of lipase methods showed significantly improved (p < 0.05) DM, OM, and EE than the existing and modified pepsin solution methods. The correlation between in vitro and in vivo data in DM, OM, and EE digestibility was high (r2 = 0.889, 0.907, and 0.721, respectively), and the correlation between in vitro and in vivo data in CP and GE digestibility was medium (r2 = 0.681 and 0.536, respectively). The current in vitro method is similar to in vivo digestibility and helps potentially predict digestibility for dogs. In conclusion, this developed in vitro method suggests that it can help estimate the nutrient digestibility of dogs' diets without in vivo experiments.
        4,000원
        811.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The domestic artificially sweetened beverage market has grown rapidly in recent years, and sodas have led this growth. This study investigated consumer food purchasing behavior of artificially sweetened sodas in terms of the food health stereotypes of “vice” and “virtue”; used to denote unhealthy and healthy food purchases, respectively. The study was conducted using consumer panel data collected by the Rural Development Administration from 2017 to 2020. Given the semi-continuous nature of artificially sweetened soda purchases, Cragg’s two-part model was used for the analysis. The probability of purchasing artificially sweetened sodas increased as expenditure on snacks (a vice food category) increased. However, of those panelists who purchased artificially sweetened sodas, expenditure on artificially sweetened sodas decreased with expenditure on snacks and increased with expenditure on fruits (a virtue food category). These results suggest that vicious-lifestyle consumers choose artificially sweetened sodas when they regulate eating habits, whereas virtuous-lifestyle consumers increase artificially sweetened soda expenditure for hedonic consumption to reduce guilt based on a sensible trade-off effect.
        4,000원
        812.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Background: The abdominal drawing-in maneuver (ADIM), a method of lumbar stabilization training, is an effective neuromuscular intervention for lumbar instability associated with low back pain (LBP). Objects: The purpose of this study was to compare the effect of a 2-week period of the ADIM and tensor fasciae latae-iliotibial band (TFL-ITB) self-stretching on lumbopelvic rotation angle, lumbopelvic rotation movement onset, TFL-ITB length, and pain intensity during active prone hip lateral rotation. Methods: Twenty-two subjects with lumbar extension rotation syndrome accompanying shortened TFL-ITB (16 males and 6 females) were recruited for this study. The subjects were instructed how to perform ADIM training or ADIM training plus TFL-ITB self-stretching program at home for a 2-week period. A 3-dimensional ultrasonic motion analysis system was used to measure the lumbopelvic rotation angle and lumbopelvic rotation movement onset. An independent t-test was used to determine between-group differences for each outcome measure (lumbopelvic rotation angle, lumbopelvic rotation movement onset, TFL-ITB length, and pain intensity). Results: The results showed that ADIM training plus TFL-ITB self-stretching decreased the lumbopelvic rotation angle, delayed the lumbopelvic rotation movement onset, and elongated the TFL-ITB significantly more than did ADIM training alone. Pain intensity was lower in the ADIM training plus TFL-ITB self-stretching group than the ADIM training alone group; however, the difference was not significant. Conclusion: ADIM training plus TFL-ITB self-stretching performed for a 2-week period at home may be an effective treatment for modifying lumbopelvic motion and reducing LBP.
        4,000원
        813.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Background: Limitations of shoulder range of motion (ROM), particularly shoulder internal rotation (SIR), are commonly associated with musculoskeletal disorders in both the general population and athletes. The limitation can result in connective tissue lesions such as superior labrum tears and symptoms such as rotator cuff tears and shoulder impingement syndrome. Maintaining the center of rotation of the glenohumeral joint during SIR can be challenging due to the compensatory scapulothoracic movement and anterior displacement of the humeral head. Therefore, observing the path of the instantaneous center of rotation (PICR) using the olecranon as a marker during SIR may provide valuable insights into understanding the dynamics of the shoulder joint. Objects: The aim of the study was to compare the displacement of the olecranon to measure the rotation control of the humeral head during SIR in individuals with and without restricted SIR ROM. Methods: Twenty-four participants with and without restricted SIR ROM participated in this study. The displacement of olecranon was measured during the shoulder internal rotation control test (SIRCT) using a Kinovea (ver. 0.8.15, Kinovea), the 2-dimensional marker tracking analysis system. An independent t-test was used to compare the horizontal and vertical displacement of the olecranon marker between individuals with and without restricted SIR ROM. The statistical significance was set at p < 0.05. Results: Vertical displacement of the olecranon was significantly greater in the restricted SIR group than in the control group (p < 0.05). However, no significant difference was observed in the horizontal displacement of the olecranon (p > 0.05). Conclusion: The findings of this study indicated that individuals with restricted SIR ROM had significantly greater vertical displacement of the olecranon. The results suggest that the limitation of SIR ROM may lead to difficulty in rotation control of the humeral head.
        4,000원
        814.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The objective of this study was to determine the ultrasonication-assisted extraction conditions that maximize the DPPH radical scavenging activity of extracts obtained from the stems of Lespedeza bicolor Turcz through the application of the Response Surface Methodology (RSM). Before delving into the analysis of extraction conditions using the RSM model, we conducted efficiency validation of ultrasonication-assisted extraction and executed single-factor experiments for ethanol concentration, extraction time, and extraction temperature. The data obtained from these single-factor experiments were employed to construct the Box-Behnken Design (BBD). In these results, in the single-factor experiments, it was evident that the parameters for ethanol concentration, extraction time, and extraction temperature exhibited quadratic trends. The single-factor experiments allowed us to discern the trends for each parameter leading to the maximum antioxidant capacity, and this data was subsequently applied to the BBD. Following the completion of initial experiments, a Response Surface Methodology (RSM) model was constructed based on Box-Behnken Design (BBD). According to the predictive model developed in this study, it was anticipated that performing ultrasonic-assisted extraction for 85.0412 minutes at an ethanol concentration of 32.573% and an extraction temperature of 51.5608°C will result in a DPPH radical scavenging activity of 79.7146%. The predictive results were statistically verified through a comparative analysis with actual measurements and ANOVA analysis, confirming the statistical significance of the model. The finding of this study underscore the significance of optimizing extraction conditions in the precise quantification of the antioxidant potential for economic advantages in both experimental and industrial contexts.
        4,900원
        815.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Background: Individuals with pes planus tend to overuse the extrinsic foot muscles, such as the tibialis anterior (TA) and peroneus longus (PL), to compensate for the weakened intrinsic foot muscles, such as the abductor hallucis (AbdH). Furthermore, differences in weight-bearing can affect the activity of muscles in both the intrinsic and extrinsic foot muscles. To date, no study has compared the effects of the short foot exercise (SFE) and toe spread-out exercise (TSO) on intrinsic and extrinsic foot muscle activity and the corresponding ratios in different weight-bearing positions. Objects: To compare the effects of the SFE and TSO on AbdH, TA, and PL activity and the AbdH/TA and AbdH/PL activity ratios in the sitting and standing positions in individuals with pes planus. Methods: Twenty participants with pes planus were recruited. Surface electromyography was used to assess the amplitudes of AbdH, TA, and PL activity. Participants performed both exercises while adopting both the sitting and standing positions. Results: No significant interaction between exercise and position was found regarding the activity of any muscle or ratio of the activity, except for PL activity. We observed a significant increase in AbdH activity during the TSO compared to the SFE, and no significant difference in TA and PL activity between the two exercises. AbdH, TA, and PL activity were significantly higher in the standing position than in the sitting position. Furthermore, the AbdH/PL activity ratio significantly increased in the sitting position, although there was a significant increase in AbdH activity in the standing position. Conclusion: In individuals with pes planus, we recommend performing the TSO in the sitting position, which may increase the activity of the AbdH while concurrently decreasing the activity of the TA and PL, thus strengthening the AbdH.
        4,000원
        816.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Background: The serratus anterior (SA) is a muscle that performs protraction of the scapulothoracic joint and plays a role in stabilizing the scapula. Imbalances or weaknesses in SA activation are associated with a variety of shoulder dysfunctions, making selective SA strengthening important for rehabilitation. Objects: We aimed to compare the muscle activation of the pectoralis major (PM), SA, external oblique (EO), and internal oblique (IO) during the push-up plus (PUP) exercise with isometric hip adduction (HA) and abdominal drawing-in maneuver (ADIM). Methods: Nineteen healthy male participants performed three PUP exercises: standard PUP, PUP with ADIM, and PUP with HA. Surface electromyography was used to measure and analyze the muscle activity for PM, SA, EO, and IO. Results: PUP with HA showed the lowest PM activity and highest SA activity, and no significant difference was observed between PUP and PUP with ADIM. PUP with ADIM showed significantly the highest EO and IO activity, followed by PUP with HA and PUP. Additionally, PUP with HA showed the lowest PM/SA ratio, and no significant difference was noted between PUP and PUP with ADIM. Conclusion: PUP with HA was able to show high SA muscle activity while reducing PM muscle activity. In addition, PUP with HA can lead to higher EO and IO muscle activity than standard PUP. This exercise could be used as a practical exercise method to selectively strengthen SA and improve scapular muscle stability during early shoulder rehabilitation.
        4,000원
        817.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Background: Single-leg squat (SLS)s are commonly used as assessment tool and closed kinetic exercises are useful for assessing performance of the lower extremities. Pronated feet are associated with foot pressure distribution (FPD) during daily activities. Objects: To compare the FPD during SLSs between groups with pronated and normal feet. Methods: This cross-sectional study included 30 participants (15 each in the pronated foot and control groups) are recruited in this study. The foot posture index was used to distinguish between the pronated foot and control groups. The Zebris FDM (Zebris Medical GmbH) stance analysis system was used to measure the FPD on the dominant side during a SLS, which was divided into three phases. A two-way mixed-model ANOVA was used to identify significant differences in FPD between and within the two groups. Results: In the hallux, the results of the two-way mixed-model ANOVAs revealed a significant difference between the group and across different phases (p < 0.05). The hallux, and central forefoot were significantly different between the group (p < 0.05). Moreover, significant differences across different phases were observed in the hallux, medial forefoot, central forefoot, lateral forefoot, and rearfoot (p < 0.05). The post hoc t-tests were conducted for the hallux and forefoot central regions. In participants with pronated foot, the mean pressure was significantly greater in hallux and significantly lower, in the central forefoot during the descent and holding phases. Conclusion: SLSs are widely used as screening tests and exercises. These findings suggest that individuals with pronated feet should be cautious to avoid excessive pressure on the hallux during the descent-to-hold phase of a SLS.
        4,000원
        818.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        예이츠의 작품에서 반복적으로 나타나는 모티프인 변신(Metamorphosis) 은 현실의 가혹함으로부터 위안을 제공한다. 아일랜드 유산에 뿌리를 두고 전설과 민 간 전승에 둘러싸여 자란 예이츠는 변신을 상징적 탈출구로 활용하여, 「흰 새」, 「레다 와 백조」, 「비잔티움으로의 향해」, 「메이브 여왕의 노년」, 환영의 바다 등의 작품을 통하여 덧없는 삶 속에서 영원한 사랑의 주제를 탐구한다. 본 논문은 예이츠의 변신 사용의 예를 분석하고, 존재의 덧없는 본질에 맞서는 그의 의도와 그 의미를 밝히는 것을 목표로 한다.
        5,100원
        819.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Background: Landing from a step or stairs is a basic motor skill but high incidence of lateral ankle sprain has been reported during landing with inverted foot. Objects: This study aimed to investigate the effect of landing height and visual feedback on the kinematics of landing and supporting lower limbs before and after the touch down and the ground reaction force(GRF)s. Methods: Eighteen healthy females were voluntarily participated in landing from the lower (20 cm) and the higher (40 cm) steps with and without visual feedback. To minimize the time to plan the movement, the landing side was randomly announced as a starting signal. Effects of the step height, the visual feedback, or the interaction on the landing duration, the kinematic variables and the GRFs at each landing event point were analyzed. Results: With eyes blindfolded, the knee flexion and ankle dorsiflexion on landing side significantly decreased before and after the touch down. However, there was no significant effect of landing height on the anticipatory kinematics on the landing side. After the touch down, the landings from the higher step increased the knee flexion and ankle dorsiflexion on both landing and supporting sides. From the higher steps, the vertical GRF, anterior GRF, and lateral GRF increased. No interaction between step height and visual feedback was significant. Conclusion: Step height and visual feedback affected the landing limb kinematics independently. Visual feedback affected on the landing side while step height altered the supporting side prior to the touch down. After the touch down, the step height had greater influence on the lower limb kinematics and the GRFs than the visual feedback. Findings of this study can contribute to understanding of the injury mechanisms and preventing the lateral ankle sprain.
        4,200원
        820.
        2024.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Background: Lateral instability of the ankle is one of the most common causes of musculoskeletal ankle injuries. The peroneus longus (PL) and peroneus brevis (PB) contribute to ankle stability. In early rehabilitation, isometric exercises have been selected for improvement of ankle stability. To effectively train the peroneal muscles during eversion, it is important to consider ankle and body posture. Objects: This study aimed to compare activation of the PL, PB, and biceps femoris (BF) muscles during eversion in different ankle postures (neutral [N], plantarflexed [PF]) and body postures (sitting and side-lying). Methods: Thirty healthy individuals with no history of lateral ankle sprains within the last 6 months were included in the study. Maximal isometric strength of eversion and muscle activation were measured simultaneously. Muscle activation at submaximal eversion was divided by the highest value obtained from maximal isometric eversion among the four postures (percent maximal voluntary isometric contraction [%MVIC]). To examine the differences in muscle activation depending on posture, a 2 × 2 repeated measures analysis of variance (ANOVA) was conducted. Results: There were significant interaction effects of ankle and body postures on PL muscle activation and evertor strength (p < 0.05). The PL muscle activation showed a significantly greater difference in the side-lying and PF conditions than in the sitting and N conditions (p < 0.05). Evertor strength was greater in the N compared to the PF condition regardless of body posture (p < 0.05). In the case of PB and BF muscle activation, only the main effects of ankle and body posture were observed (p < 0.05). Conclusion: Among the four postures, the side-lying-PF posture produced the highest muscle activation. The side-lying-PF posture may be preferred for effective peroneal muscle exercises, even when considering the BF muscle.
        4,200원