http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Sex Differences in Hamstring Flexibility Changes After Specific Warm-up
Wootaek Lim 한국전문물리치료학회 2023 한국전문물리치료학회지 Vol.30 No.4
Background: Although warm-ups before exercise are widely accepted, research on sex differences in improving hamstring flexibility is limited. Differences in the physical and physiological characteristics between males and females may result in different responses to warm-ups. Objects: This study aimed to examine sex differences in the effects of specific warm-up on hamstring flexibility. Methods: This study included 24 young adults with hamstring tightness. The participants performed five maximal knee extensions and flexions at 90° flexion of the hip, and the maximal knee extension angle was measured in real-time using a smartphone clinometer application. Results: The groups did not significantly affect the maximal knee extension angle but showed a significant effect for repetition (p = 0.002) and group-repetition interaction (p = 0.002). Males had no significant change in hamstring flexibility; however, females showed a significant increase in flexibility in the 5th trial compared with the 1st trial (p = 0.041). These results demonstrated sex-specific differences in flexibility improvement over time. Conclusion: The findings of this study suggest that specific warm-up can successfully improve hamstring flexibility in females. This may be due to various factors, such as muscle stiffness of the lower extremity, estrogen levels, and temperature sensitivity. In clinical settings, specific warm-up might be helpful for females who participate in sports or activities, such as running or jumping, which require a full range of motion in the hip and knee joints.
Wootaek Lim(임우택) 대한스트레스학회 2016 스트레스硏究 Vol.24 No.4
본 연구의 목적은 고유수용성 신경근 촉진법을 이용한 뒤넙다리근의 스트레칭 동안 휴대용 근력계를 이용하여 측정된 고관절 신전력과 스트레칭으로 인해 증가된 뒤넙다리근 유연성 사이의 관계를 보는 것이었다. 스트레칭은 1세트 (총 6회, 회당 5초) 수행되었다. 스트레칭 전, 후 능동 무릎 폄 검사가 즉청되었으며, 뒤넙다리근의 최대 신전력은 휴대용 근력계로 측정되었다. 신전력과 유연성 사이의 상관관계는 없었으나, 6회 동안 측정된 평균 신전력의 최소값과 최대값은 유의한 차이를 보였다. 일정하지 않은 신전력의 적용은 스트레칭 효과를 감소할지 모른다. 스트레칭 동안 휴대용 근력계를 이용하여 피험자의 스트레칭 수행정도를 관찰하고 실시간으로 피드백을 줄 수 있다면, 임상 및 스포츠물리치료현장에서 매우 유용할 것이다. The purpose of this study was to investigate the relationship between hip extension force measured by using a hand-held dynamometer (HHD) and the effect of proprioceptive neuromuscular facilitation (PNF) stretching on hamstring flexibility. Many athletes try to avoid strains by excessive stress while maintaining or improving performance. It has been widely demonstrated that PNF stretching increases hamstring flexibility by decreasing active resistance. Thirty-four young men and women participated in the study. Active knee extension (AKE) was measured with a goniometer before and after hold-relax PNF stretching. Additionally, AKE data were collected at 2, 6, 10, 20, and 30 min. The maximal isometric contraction force of the hamstring was measured by using a HHD during a single set of PNF stretches (6 trials×5 s/trial). The mean forces measured by using the hand-held dynamometer were not significantly different between the trials; however, the averages of the maximum and minimum values obtained for each trial were significantly different. Hamstring flexibility at pre-stretch differed between men and women, but the immediate and sustained effects of stretching did not differ between the sexes. The isometric contraction force of the hip extensor during hold-relax PNF stretching was successfully measured and quantified with the use of a HHD. The inconsistencies in the isometric contraction force between trials might diminish the effect of stretching. The use of a HHD to monitor the effort applied by a subject and provide real-time feedback might enhance the effectiveness of stretching in the clinical field or in sports physiotherapy.
Wootaek Lim(임우택),Bongsam Choi(최봉삼) 대한스트레스학회 2017 스트레스硏究 Vol.25 No.1
이 연구는 현재 척수 손상시 널리 적용되는 치료적 중재에 대한 고찰 및 제한점에 대해 알아보고자 하였다. 척수 손상은 신경학적 손상과 그에 따른 심각한 근육 위축을 초래한다. 손상 초기에는 산화적 스트레스, 지질 과산화 등과 같은 이차적 손상으로 인한 추가 신경 손상을 막기 위해 약물요법이 널리 사용되고 있다. 또한 삶의 질과 관련성이 높은 보행 능력에 대한 임상 전, 임상 연구는 보행 능력의 회복에 그 촛점을 맞추고 있으며, 이에 대한 예로서, 트레드밀 훈련, 자전거 훈련, 로봇 훈련 등이 시행되고 있다. 최근에는 세포나 조직을 이식하는 이식치료가 많은 관심 속에 연구되고 있으나 안전성을 확보하기 위한 추가적인 연구가 필요하다. 척수손상은 단순히 신체손상뿐아니라 정신건강에도 부정적 영향을 주는 다면적인 손상을 초래할 수 있기 때문에 단독치료 접근방법 보다는 심리인지적 치료를 포함한 다양한 치료가 결합된 형태를 고려해야 한다. The purpose of this review is to discuss current therapeutic interventions and their limitations for the optimal treatment outcomes of individuals with spinal cord injury (SCI). SCI leads to neurologic deficits and subsequent severe muscle atrophy. In clinics, despite the controversy, pharmacological therapy using methylprednisolone has widely been accepted to reduce additional neurologic deficits caused by a secondary injury such as oxidative stress and lipid peroxidation. Moreover, it facilitates the recovery process. Since the loss of locomotor function may reduce the quality of life for individuals with SCI, many pre-clinical and clinical studies have focused on the recovery of locomotor function. Various forms of locomotor training such as treadmill training, cycle training, and robotic-assisted training are currently available for individuals with SCI. Additionally the cell-based interventions have been receiving much attention as one of potential therapeutic interventions which required further clarifications due to the issues of safety. The physical impairment associated with spinal cord injury may cause an adverse effect on mental health. It is now recommended that combined physical and psychological interventions should be considered to maximize the efficacy of therapeutic interventions.
임우택(Wootaek Lim),백승권(Seungkwon Beack),이태진(Taejin Lee) 한국방송·미디어공학회 2021 한국방송공학회 학술발표대회 논문집 Vol.2021 No.6
오디오 대역 확장 기술은 저 해상도의 오디오 신호를 고 해상도의 오디오 신호로 복원 또는 생성해 내는 기술이다. 이와 관련하여 오디오 코덱에서는 고 대역 오디오 신호의 저 비트 부호화를 위해 사람이 청각이 둔감하게 인지하는 고 대역의 오디오 신호에 대해 실제 신호에 대한 양자화를 수행하지 않고, 코딩 되어 전송된 저 대역 신호와 고 대역의 파라미터를 이용하여 신호를 합성하는 스펙트럼 대역 복제 기술이 널리 사용된다. 본 연구에서는 선형 예측 기반의 주파수 대역 복제 방법을 통해 추가 정보를 활용한 오디오 대역 확장을 수행하고 신경망 기반의 오디오 신호 개선을 통해 복제된 신호의 개선 가능성을 검토하였다. 실험 평가는 MPEG 에서 코덱 평가용으로 사용되는 테스트 시퀀스를 사용하였으며, 실험 결과 제안하는 방법을 적용하여 기존 오디오 대역 확장 기술 대비 성능이 향상됨을 확인하였다.
임우택(Wootaek Lim) 한국전문물리치료학회 2021 한국전문물리치료학회지 Vol.28 No.1
A normal range of motion is essential for performing activities of daily living. The capsular pattern is the proportional motion restriction in range of motion during passive exercises due to tightness of the joint capsule. Although the capsular pattern is widely referred to in clinical practice, there is no scientific evidence to support the concept. In this review, the appropriateness of the capsular pattern for evaluation of joint pathology was assessed. In the Textbook of Orthopaedic Medicine written by Cyriax, the capsular pattern did not specify how much reduction in angular motion is considered motion restriction. As the definition proposed initially was unclear, different methods have been used in previous studies investigating capsular pattern. In addition, the capsular pattern described all the major joints of the human body, but only the hip joint, knee joint, and shoulder joint were studied in experimental studies. Sensitivity and specificity were reported in one study and were meaningful in specific pathologies (loss of extension to loss of flexion). There was no consensus on the reliability and validity. In summary, the capsular pattern suggested by Cyriax or Kaltenborn is not supported or applies only to certain conditions. Various components around a joint complement each other and provide stability to the joint. It is recommended that the therapist perform multiple assessments rather than rely on a single assessment when evaluating joints.