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Human movement science 38건

  1. [해외논문]   Relationship between postural control and muscle activity during a handstand in young and adult gymnasts   SCI SCIE SSCI SCOPUS

    Kochanowicz, Andrzej (Department of Gymnastics and Dance, Gdansk University of Physical Education and Sport, Kazimierza Górskiego 1, 80-336 Gdańsk, Poland ) , Niespodziń (Department of Anatomy and Biomechanics, Institute of Physical Education, Kazimierz Wielki University, Sportowa 2, 85-091 Bydgoszcz, Poland ) , ski, Bartłomiej (Department of Sport Performance, INEFC Barcelona, Av de l'Estadi sn, 08038 Barcelona, Spain ) , Marina, Michel (Department of Anatomy and Biomechanics, Institute of Physical Education, Kazimierz Wielki University, Sportowa 2, 85-091 Bydgoszcz, Poland ) , Mieszkowski, Jan (Department of Theory and Methodology of Gymnastics, University of Physical Education in Krakow, Al. Jana Pawła II 78, 31-571 Krakow, Poland ) , Biskup, Leon (Department of Theory of Sport and Human Motorics, Gdansk University of Physical Education and Sport, Kazimierza Górskiego 1, 80-336 Gdańsk, Poland) , Kochanowicz, Kazimierz
    Human movement science v.58 ,pp. 195 - 204 , 2018 , 0167-9457 ,

    초록

    Abstract The aim of this study was to evaluate the relationship between muscle activity and inter-muscle contributions patterns and postural control during a handstand. Additionally, outcomes were compared between young and adult gymnasts (mean ± SD: 13.9 ± 0.7 and 23 ± 3 years respectively). Participants performed three trials of a 10 s handstand on a force platform with simultaneous EMG signal recording at the upper and lower limbs. Adult gymnasts demonstrated significantly better postural control in each studied variable. The wrist flexors demonstrated the highest relative mean (60%) and peak (200%) EMG activity of all muscle groups studied. Wrist flexor activity was also highly correlated with postural control variables in both groups. The trapezius descendens and wrist flexor muscles demonstrated the highest contribution (20–26% and 25.5–28% respectively), followed by anterior deltoid (15–18%) and triceps brachii (13–16%) in both groups. The young gymnast group demonstrated significantly greater mean relative muscle activity at the triceps brachii, biceps brachii and rectus femoris compared with the adult group (88% ( p = 0.023), 150% ( p = 0.003) and 75% ( p = 0.039) respectively). To conclude, despite comparable inter-muscle contributions during a handstand, young and adult gymnasts demonstrated a different relationship between muscle activity and postural control variables. Highlights Young and adults have comparable inter-muscle contribution during a handstand. The wrist flexors demonstrate the highest EMG activity of all studied muscles. The opposite EMG/postural control relationship is seen in young and adults.

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  2. [해외논문]   What factors can affect lumbopelvic flexion-extension motion in the sagittal plane?: A literature review   SCI SCIE SSCI SCOPUS

    Zawadka, Magdalena (Faculty of Health Sciences, Medical University of Lublin, Jaczewskiego 8 Street, 20-090 Lublin, Poland ) , Skublewska-Paszkowska, Maria (Institute of Computer Science, Electrical Engineering and Computer Science Faculty, Lublin University of Technology, 20-618 Lublin, Nadbystrzycka 38D, Poland ) , Gawda, Piotr (Department of Rehabilitation and Physiotherapy, Chair of Rehabilitation, Physiotherapy and Balneotherapy, Faculty of Health Sciences, Medical University of Lublin, Magnoliowa 2 Street, 20-143 Lublin, Poland ) , Lukasik, Edyta (Institute of Computer Science, Electrical Engineering and Computer Science Faculty, Lublin University of Technology, 20-618 Lublin, Nadbystrzycka 38D, Poland ) , Smolka, Jakub (Institute of Computer Science, Electrical Engineering and Computer Science Faculty, Lublin University of Technology, 20-618 Lublin, Nadbystrzycka 38D, Poland ) , Jablonski, Miroslaw (Department of Rehabilitation and Orthopedics, Medical University of Lublin, Jaczewskiego 8 Street, 20-090 Lublin, Poland)
    Human movement science v.58 ,pp. 205 - 218 , 2018 , 0167-9457 ,

    초록

    Abstract Clinicians use forward bending and backward return in routine clinical examinations for evaluating spine mobility. The magnitude and timing of lumbar spine and pelvic contributions have been described in the literature as lumbopelvic rhythm. There is still limited knowledge about the factors which can determinate lumbar and hip mobility and coordination in the sagittal plane. The aim of this study is to demonstrate those factors contributing to the lumbopelvic rhythm and to explain the differences observed between subjects. The studies included in the review present possible explanations of observed lumbar-pelvic motion and/or coordination. They measure movement of the lumbar spine, the pelvis and/or the hip in the sagittal plane. The search was conducted in August 2017. Two databases (PubMed and Web of Science) were searched. The search identified 126 potentially relevant articles (53 in PubMed, 73 in Web of Science). Initial screening based on titles and abstracts retrieved 35 articles. The second stage of selection involved reading the full texts of articles. Twenty-four papers were selected in this stage. After careful bibliographic study, seven papers were added for this review, resulting in a total of 31. This literature review demonstrates those factors contributing to lumbopelvic motion. Age and gender, hamstring muscle tightness, feet position, muscle fatigue, movement speed and external loading as well phase of motion can affect various aspects of lumbopelvic rhythm. Highlights It remains unclear what factors can determine lumbopelvic rhythm in the sagittal plane. This paper includes in its review 31 studies. The literature review shows seven factors contributing to lumbopelvic motion.

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  3. [해외논문]   Effects of manipulated auditory information on local dynamic gait stability   SCI SCIE SSCI SCOPUS

    Hamacher, Daniel (Institute of Sport Science, Friedrich Schiller University Jena, Seidelstraße 20, 07749 Jena, Germany ) , Schley, Franziska (Institute of Sport Science, Friedrich Schiller University Jena, Seidelstraße 20, 07749 Jena, Germany ) , Hollander, Karsten (Department of Sports and Exercise Medicine, Institute of Human Movement Science, University of Hamburg, Turmweg 2, 20148 Hamburg, Germany ) , Zech, Astrid (Institute of Sport Science, Friedrich Schiller University Jena, Seidelstraße 20, 07749 Jena, Germany)
    Human movement science v.58 ,pp. 219 - 223 , 2018 , 0167-9457 ,

    초록

    Abstract Auditory information affects sensorimotor control of gait. Noise or active noise cancelling alters the perception of movement related sounds and, probably, gait stability. The aim of the current study was to evaluate the effects of noise cancelling on gait stability. Twenty-five healthy older subjects (70 ± 6 years) were included into a randomized cross-over study. Gait stability (largest Lyapunov exponent) in normal overground walking was determined for the following hearing conditions: no manipulation and active noise cancelling. To assess differences between the two hearing conditions (no manipulation vs. active noise cancelling), Student’s repeated measures t -test was used. The results indicate an improvement of gait stability when using active noise cancelling compared to normal hearing. In conclusion, our results indicate that auditory information might not be needed for a stable gait in elderly. Highlights Auditory information affects sensorimotor control of gait. We tested the effect of active noise cancelling on local dynamic gait stability. Noise cancelling improved local dynamic gait stability compared to normal walking. Auditory information might not be needed for a stable gait in the elderly.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

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  4. [해외논문]   Region-specific modulation of tendon reflex along human rectus femoris muscle   SCI SCIE SSCI SCOPUS

    Watanabe, Kohei (Address: School of International Liberal Studies, Chukyo University, Yagotohonmachi, Showa-ku, Nagoya 466-8666, Japan.)
    Human movement science v.58 ,pp. 224 - 230 , 2018 , 0167-9457 ,

    초록

    Abstract Introduction We investigated regional differences in amplitude modulation of the spinal reflex along the human rectus femoris (RF) muscle to test the hypothesis that this muscle is regionally regulated at the spinal cord or a higher level. Methods Surface electromyography was conducted at six different sites along the RF muscle during the conditioned patellar tendon reflex in eight healthy young men. Results A significant difference in the reflex amplitude among the channels was observed during 20% of the maximal voluntary contraction (MVC) and there was a significant difference in normalized reflex amplitude between 10 and 20% of the MVC at most proximal channel ( p p > 0.05), during knee flexion of the ipsilateral leg. Discussion From the results in the present study, we infer that the amplitude modulation of the tendon reflex within the RF muscle is regionally regulated, and that this regulation is dependent on the performed tasks.

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  5. [해외논문]   Effect of wobble board training on movement strategies to maintain equilibrium on unstable surfaces   SCI SCIE SSCI SCOPUS

    Silva, Priscila de Brito (Sport Sciences, Department of Health Science and Technology, Aalborg University, Fredrik Bajers Vej 7 D-3, DK-9220 Aalborg, Denmark ) , Mrachacz-Kersting, Natalie (Sport Sciences, Department of Health Science and Technology, Aalborg University, Fredrik Bajers Vej 7 D-3, DK-9220 Aalborg, Denmark ) , Oliveira, Anderson Souza (Department of Mechanical and Manufacturing Engineering, Aalborg University, Fibigerstraede 16, Aalborg East 9220, Denmark ) , Kersting, Uwe Gustav (Sport Sciences, Department of Health Science and Technology, Aalborg University, Fredrik Bajers Vej 7 D-3, DK-9220 Aalborg, Denmark)
    Human movement science v.58 ,pp. 231 - 238 , 2018 , 0167-9457 ,

    초록

    Abstract Standing on unstable surfaces requires more complex motor control mechanisms to sustain balance when compared to firm surfaces. Surface instability enhances the demand to maintain equilibrium and is often used to challenge balance, but little is known about how balance training affects movement strategies to control posture while standing on unstable surfaces. This study aimed at assessing the effects of isolated wobble board (WB) training on movement strategies to maintain balance during single-leg standing on a WB. Twenty healthy men were randomly assigned to either a control or a training group. The training group took part in four weeks of WB training and both groups were tested pre and post the intervention. Electromyography from the supporting lower limb muscles, full-body kinematics and ground reaction forces were recorded during firm surface (FS) and WB single-leg standing. WB training did not affect FS performance (p = 0.865), but tripled WB standing time (p Highlights Effects of WB training on balance strategies on unstable supports were quantified. WB training did not improve firm surface single-leg standing balance performance. WB training improved the performance when single-leg standing on a WB. WB training improved counter-movement strategies to maintain balance on a WB. WB standing time correlates to reduced trunk and swing leg counter-movement velocity.

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  6. [해외논문]   Influence of rest interval on foot-tibia coordination with chronic ankle instability during the Star Excursion Balance Test   SCI SCIE SSCI SCOPUS

    Kwon, Yong Ung (Department of Kinesiology and Sport Science, Youngstown State University, Youngstown, OH, United States ) , Arnold, Brent L. (Department of Health Sciences, Indiana University-Purdue University Indianapolis, IN, United States ) , Powell, Douglas W. (School of Health Studies, University of Memphis, Memphis, TN, United States ) , Williams III, D.S. Blaise (Department of Physical Therapy, Virginia Commonwealth University, Richmond, VA, United States)
    Human movement science v.58 ,pp. 239 - 247 , 2018 , 0167-9457 ,

    초록

    Abstract The purpose of this study was to determine whether different rest intervals affect performance on the Star Excursion Balance Test (SEBT) associated with chronic ankle instability (CAI) and whether foot-tibia coordination can be associated factors that may help discriminate between individuals with and without CAI during the SEBT. Participants included forty-eight individuals with (n = 24) and without CAI (n = 24). Subjects completed 3 trials in each of the 3 reach directions (anteromedial, medial, posteromedial) in random order. A total of three visits were required to complete the 3 rest interval conditions (10, 20, 40 s). Coupling angles (CA) of tibial internal rotation/dorsiflexion (TIR/DF) and tibial internal rotation/eversion (TIR/EV) were calculated and compared between groups in each direction for each rest interval. Individuals with CAI showed greater CAs of TIR/DF in the M direction (p = 0.01) and of TIR/EV in the P direction (p = 0.04) than healthy individuals in 20 s rest interval time. Overall, joint CAs were different between healthy individuals and those with CAI during the SEBT regardless of rest interval. Based on these results, rest interval and a natural result of CAI could alter ankle joint coordination in comparison of healthy individuals when performing the SEBT.

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  7. [해외논문]   Association between stride time fractality and gait adaptability during unperturbed and asymmetric walking   SCI SCIE SSCI SCOPUS

    Ducharme, Scott W. (Motor Control Laboratory, University of Massachusetts-Amherst, Amherst, MA, USA ) , Liddy, Joshua J. (Motor Development and Control Laboratory, Purdue University, West Lafayette, IN, USA ) , Haddad, Jeffrey M. (Motor Development and Control Laboratory, Purdue University, West Lafayette, IN, USA ) , Busa, Michael A. (Institute for Applied Life Sciences, University of Massachusetts-Amherst, Amherst, MA, USA ) , Claxton, Laura J. (Motor Development and Control Laboratory, Purdue University, West Lafayette, IN, USA ) , van Emmerik, Richard E.A. (Motor Control Laboratory, University of Massachusetts-Amherst, Amherst, MA, USA)
    Human movement science v.58 ,pp. 248 - 259 , 2018 , 0167-9457 ,

    초록

    Abstract Human locomotion is an inherently complex activity that requires the coordination and control of neurophysiological and biomechanical degrees of freedom across various spatiotemporal scales. Locomotor patterns must constantly be altered in the face of changing environmental or task demands, such as heterogeneous terrains or obstacles. Variability in stride times occurring at short time scales (e.g., 5–10 strides) is statistically correlated to larger fluctuations occurring over longer time scales (e.g., 50–100 strides). This relationship, known as fractal dynamics, is thought to represent the adaptive capacity of the locomotor system. However, this has not been tested empirically. Thus, the purpose of this study was to determine if stride time fractality during steady state walking associated with the ability of individuals to adapt their gait patterns when locomotor speed and symmetry are altered. Fifteen healthy adults walked on a split-belt treadmill at preferred speed, half of preferred speed, and with one leg at preferred speed and the other at half speed (2:1 ratio asymmetric walking). The asymmetric belt speed condition induced gait asymmetries that required adaptation of locomotor patterns. The slow speed manipulation was chosen in order to determine the impact of gait speed on stride time fractal dynamics. Detrended fluctuation analysis was used to quantify the correlation structure, i.e., fractality, of stride times. Cross-correlation analysis was used to measure the deviation from intended anti-phasing between legs as a measure of gait adaptation. Results revealed no association between unperturbed walking fractal dynamics and gait adaptability performance. However, there was a quadratic relationship between perturbed, asymmetric walking fractal dynamics and adaptive performance during split-belt walking, whereby individuals who exhibited fractal scaling exponents that deviated from 1/f performed the poorest. Compared to steady state preferred walking speed, fractal dynamics increased closer to 1/f when participants were exposed to asymmetric walking. These findings suggest there may not be a relationship between unperturbed preferred or slow speed walking fractal dynamics and gait adaptability. However, the emergent relationship between asymmetric walking fractal dynamics and limb phase adaptation may represent a functional reorganization of the locomotor system (i.e., improved interactivity between degrees of freedom within the system) to be better suited to attenuate externally generated perturbations at various spatiotemporal scales. Highlights Stride time fractal dynamics may represent locomotor adaptive capacity. Previous studies on gait fractal dynamics have not incorporated gait perturbations. Unperturbed walking fractal dynamics did not associate with gait adaptability. However, asymmetric walking fractal dynamics did associate with adaptive gait. Fractal dynamics closer to 1/f correlated to better adaptation to imposed asymmetry.

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  8. [해외논문]   Gait strategies to reduce the dynamic joint load in the lower limbs during a loading response in young healthy adults   SCI SCIE SSCI SCOPUS

    Tajima, Toshiki (Corresponding author at: Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.) , Tateuchi, Hiroshige , Koyama, Yumiko , Ikezoe, Tome , Ichihashi, Noriaki
    Human movement science v.58 ,pp. 260 - 267 , 2018 , 0167-9457 ,

    초록

    Abstract Reducing external joint moments during gait can lead to a reduction in dynamic joint load. There has yet to be a detailed investigation of gait strategies that can reduce external joint moments by decreasing the magnitude of ground reaction force (GRF) without reducing the walking speed. The objectives of this study were to verify whether it is possible to reduce external joint moments by decreasing the GRF magnitude without reducing the walking speed and to identify the alternative walking strategy involved in young healthy adults. This study included 14 young healthy subjects. They performed two types of walking: normal and impact reduction walking. For impact reduction walking, the subjects walked in a manner that reduced the impact upon foot contact. Cadence and step length were unified between the two conditions. The walking speed, peak value of vertical GRF, braking-accelerating force, loading rate, joint angle, and external joint moments of the two conditions were recorded and compared. No significant difference was noted in the walking speed. However, the first peak of vertical GRF, braking force, and loading rate during loading response were significantly reduced during impact reduction walking, and external joint moments in the hip, knee, and ankle joints were reduced. In contrast, the second peak of vertical GRF, hip extension angle, and external ankle dorsiflexion moment were significantly increased during terminal stance. Our data imply that the ankle joint function during the terminal stance is important in reducing the dynamic joint load in the contralateral leg during the loading response.

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  9. [해외논문]   Light touch leads to increased stability in quiet and perturbed balance: Equivalent effects between post-stroke and healthy older individuals   SCI SCIE SSCI SCOPUS

    Martinelli, Alessandra Rezende (Human Motor Systems Laboratory, School of Physical Education and Sport, University of São Paulo, SP, Brazil ) , Coelho, Daniel Boari (Human Motor Systems Laboratory, School of Physical Education and Sport, University of São Paulo, SP, Brazil ) , Teixeira, Luis Augusto (Human Motor Systems Laboratory, School of Physical Education and Sport, University of São Paulo, SP, Brazil)
    Human movement science v.58 ,pp. 268 - 278 , 2018 , 0167-9457 ,

    초록

    Abstract Cerebral damage provoked by stroke may lead to deficits of quiet balance control and of the recovery of body equilibrium following an unanticipated postural perturbation. In this investigation we aimed to evaluate the effect of light touch (LT) of an earth-fixed surface on balance stability in individuals with post-stroke hemiparesis, taking performance of age-matched healthy participants as reference. Evaluations were made in conditions of full and no visual information. Analysis of quiet balance showed that LT induced higher balance stability, with reduced amplitude and velocity of postural sway. Evaluation of the effect of LT on automatic postural responses was made in the task of recovering body equilibrium following a mechanical perturbation of balance leading to fast forward body sway. Results showed that LT led to reduced amplitude of center of mass displacement following the perturbation, in addition to reduced amplitude and velocity of center of pressure under the feet, and lower activation of the lower legs muscles. Those effects of LT were observed in both the post-stroke and control groups, and did not interact with vision availability. Our results indicated then that individuals who suffered a cerebral stroke can stabilize perturbed and non-perturbed postural responses by lightly touching a stable surface to a similar extent of healthy older individuals. Highlights Light touch stabilized quiet balance in both AP and ML sway directions. Light touch led to more stable postural responses to unanticipated perturbations. Effects of light touch did interact with vision availability. Similar effects of light touch between healthy and post-stroke individuals.

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  10. [해외논문]   Vertical ground reaction force in stationary running in water and on land: A study with a wide range of cadences   SCI SCIE SSCI SCOPUS

    de Brito Fontana, Heiliane (Federal University of Santa Catarina, School of Biological Science, Campus Reitor João David Ferreira Lima, s/n, Trindade, Florianópolis, SC CEP 88040-900, Brazil ) , Ruschel, Caroline (Santa Catarina State University, Health and Sports Science Centre, Aquatic Biomechanics Research Laboratory, Rua Pascoal Simone, 358, Coqueiros, Florianópolis, SC CEP: 88080-350, Brazil ) , Dell'Antonio, Elisa (Santa Catarina State University, Health and Sports Science Centre, Aquatic Biomechanics Research Laboratory, Rua Pascoal Simone, 358, Coqueiros, Florianópolis, SC CEP: 88080-350, Brazil ) , Haupenthal, Alessandro (Federal University of Santa Catarina, R. Gov. Jorge Lacerda, 3201, Urussanguinha, Araranguá, SC 88905-355, Brazil ) , Pereira, Gustavo Soares (Santa Catarina State University, Health and Sports Science Centre, Aquatic Biomechanics Research Laboratory, Rua Pascoal Simone, 358, Coqueiros, Florianópolis, SC CEP: 88080-350, Brazil ) , Roesler, Helio (Santa Catarina State University, Health and Sports Science Centre, Aquatic Biomechanics Research Laboratory, Rua)
    Human movement science v.58 ,pp. 279 - 286 , 2018 , 0167-9457 ,

    초록

    Abstract Purpose: The aim of this study was to analyze the effect of cadence, immersion level as well as body density on the vertical component (Fy max ) of ground reaction force (GRF) during stationary running (SR). Methods: In a controlled, laboratory study, thirty-two subjects ran at a wide range of cadences (85–210 steps/min) in water, immersed to the hip and to the chest, and on dry land. Fy max. was verified by a waterproof force measurement system and predicted based on a statistical model including cadence, immersion ratio and body density. Results: The effect of cadence was shown to depend on the environment: while Fy max increases linearly with increasing cadence on land; in water, Fy max reaches a plateau at both hip and chest immersions. All factors analyzed, cadence, immersion level and body density affected Fy max significantly, with immersion (aquatic × land environment) showing the greatest effect. In water, different cadences may lead to bigger changes in Fy max than the changes obtained by moving subjects from hip to chest immersion. A regression model able to predict 69% of Fy max variability in water was proposed and validated. Conclusion: Cadence, Immersion and body density affect Fy max in a significant and non-independent way. Besides a model of potential use in the prescription of stationary running in water, our analysis provides insights into the different responses of GRF to changes in exercise parameters between land and aquatic environment. Highlights Cadence effect on vGRF in stationary running differs between water and dry land. vGRF increases linearly with cadence during stationary running on dry land. During water stationary running, vGRF increases with cadence up to a certain point. From hip to chest immersion, vGRF in stationary running decreases by more than ⅓. Cadence, immersion and body density explain 69% of vGRF in water stationary running.

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