Korean Journal of Sport Biomechanics最新文献

{"title":"An Analysis of X-Factor, Triple X-Factor, and the Center of Pressure (COP) according to the Feel of the Golf Driver Swing","authors":"Y. Kim, Jaemoo So","doi":"10.5103/KJSB.2016.26.3.265","DOIUrl":"https://doi.org/10.5103/KJSB.2016.26.3.265","url":null,"abstract":"Objective: The aim of this study was to analyze X-factor, triple X-factor, and the center of pressure (COP) according to the feel of golf driver swing. Method: For this research, 9 golfers from the Korea Professional Golfers`` Association (age: 30.11±2.98 yrs, height: 178.00±8.42 cm, weight: 76.22±8.42 kg, experience: 10.06±3.11 yrs) were recruited to participate in the experiment. Twelve Motion Analysis Eagle-4 cameras were installed and an image analysis was conducted by using the NLT (non-linear transformation) method, and 2 units of Kistler type 5233A dynamometer were used to measure ground reaction force. The sampling ratio was set at 1000 Hz. The golfers each took 10 swings by using their own driver, and chose the best and worse feel from among 10 shots. A paired-sample t-test was used to analyze the results. Results: In regard to feel, no change in head speed, X-factor, and the triple X-factor``s X factor stretch, hip rise, and head swivel, was observed (p>.05). Regarding ground reaction force, a difference was observed between the top of the backswing (p<.05) and impact (p<.05) in the vertical force of the left foot. For COP, a difference was also observed between the mid backswing (p<.001), late backswing (p<.001), and top of the backswing (p<.05) for the right foot X-axis and Y-axis mid follow through (p<.01). Conclusion: It can be reasoned that, irrespective of feel, the head speed, X-factor and triple X factor``s Xfactor stretch, hip rise and head swivel did not have an effect on drive distance for domestic golfers, and the vertical reaction force of the left foot and left-right movement span``s pressure dispersal of the right foot had an increasing effect on drive distance.","PeriodicalId":306685,"journal":{"name":"Korean Journal of Sport Biomechanics","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132078032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kinematical Analysis of Somersault with Twist in Men`s Vault: Focusing on the Lou Yun and Akopian Motions","authors":"Kyu-chan Lim, H. S. Park","doi":"10.5103/KJSB.2016.26.3.243","DOIUrl":"https://doi.org/10.5103/KJSB.2016.26.3.243","url":null,"abstract":"Vaulting should be performed with all the technical motions required in gymnastics, such as board contact, horse contact, takeoff, somersault, twist, and landing. The degree of difficulty of a technique is determined based on the type of takeoff, the body position during somersault, and the number of turns (International Gymnastics Federation [FIG], 2013). The FIG has classified the types of vault into 5 groups according to the entry types established through the regulatory reform in 2013. The first group includes the forward handspring and Yamashita-style vault; the second group, the handspring with a one-fourth or half turn in the first flight phase (phase from the board takeoff to horse contact); the third group, the round-off entry vaults with a one-fourth turn in a backward direction in the second flight phase (phase from horse takeoff to mat landing); the fourth group, the round-off entry vaults with a half turn in the first flight phase; and the fifth group, the round-off entry vaults with three-fourth or full turn in the first flight phase (FIG, 2013). In the first group, forward somersault technique with a half turn and landing toward the vault is called Cuervo vault, where a technique score is given for every turn made. In other words, 1 turn in addition to the Cuervo vault is the Lou Yun vault, with 5.2 points, and 1 turn in addition to the Lou Yun vault becomes Yeo 2 vault, with 6.0 points (FIG, 2013). In addition, landing by backward somersaulting in group 2 is called the Tsukahara vault, and a half turn and forward somersaulting after the takeoff at this motion is the Kasamatsu vault. The technique score increases as the number of turns increases. Landing after 1 more turn with the body stretched as in the Kasamatsu vault is the Akopian motion, with 5.2 points. A half turn in addition to this technique is the Driggs vault, with 5.6 points, and a half turn in addition to this and landing to the vault is the Lopez vault, with 6.0 (FIG, 2013). As mentioned earlier, the techniques with a greater degree of difficulty in the first and second groups should be based on the accurate performance of the Lou Yun and Akopian motions. As discussed earlier, the scores in the two techniques are the same, and the motions in full and half turns with the body stretched during aerial movement are also identical. Contact with the vault is made after a side turn in the Akopian motion, causing a time difference between the vault landings with the two hands, with the load being inclined to one arm (Dilman, Cheetham, and Smith, 1985). Therefore, increasing momentary elasticity is challenging (Lee, Park, & Lee, 2006; Back et al., 2005). In addition, Lim (2005) argued that KJSB Korean Journal of Sport Biomechanics 2016; 26(3): 243-248 http://dx.doi.org/10.5103/KJSB.2016.26.3.243 http://e-kjsb.org eISSN 2093-9752 ORIGINAL","PeriodicalId":306685,"journal":{"name":"Korean Journal of Sport Biomechanics","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132879603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of Gait Assistive Devices in Patients with Parkinson's Disease","authors":"Miyoung Kim, B. Lim","doi":"10.5103/KJSB.2016.26.3.309","DOIUrl":"https://doi.org/10.5103/KJSB.2016.26.3.309","url":null,"abstract":"of double support, base of support, and support time) (Bryant et al., 2011). Assistive devices equipped with lasers were developed to improve freezing of gait and step length. Results regarding the effect of four-wheel walkers with lasers have been inconsistent, with one study showing that four-wheel walkers with lasers did not reduce freezing of gait (Cubo et al., 2003) but others suggesting otherwise. To address the inconsis-tency in the results and overcome the limitations of assistive devices, Kegelmeyer, Parthasarathy, Kostyk, White & Kloos (2013) compared the effects of five types of assistive devices (i.e., cane, standard assistive device, two-wheel walker, four-wheel walker, and U-Step walker) on gait parameters in 27 patients with PD. Their findings showed that all of the assistive devices except the four-wheel walkers and U-Step walkers significantly decreased gait speed. Gait variability was lowest with four-wheel walkers and highest with U-Step walkers, suggesting that U-Step walkers are associated with the highest risk of falling. Four-wheel walkers produced consistent improvements in all gait parameters, whereas lasers Objective: There are no guidelines for choosing appropriate gait assistive devices. The aim of this study was to evaluate gait assistive devices in patients with Parkinson's disease. Method: We evaluated 15 individuals with Parkinson's disease who did or did not use one of two different devices including canes and two-wheeled walkers. Data were collected using the GAITRite system. Results: Participants in the group using canes and two-wheeled walkers had significantly increased double support time and decreased gait velocity, normalized gait velocity, and stride length compared with those who did not. Participants who used a two-wheeled walker had significantly decreased gait velocity, normalized gait velocity, and stride length compared with those who used a cane. Furthermore, participants who used a two-wheeled walker had significantly decreased coefficients of variation for step time, stride length, and swing time compared with those who used a cane. Conclusion: Our results indicated that the two-wheeled walker offered the most consistent advantages for decreasing the risk of falling.","PeriodicalId":306685,"journal":{"name":"Korean Journal of Sport Biomechanics","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133848991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Freezing of Gait and Visual Information on the Static Postural Control Ability in Patients with Parkinson`s Disease","authors":"Jung Yee Kim, M. Son, You Kyung Kim, Meounggon Lee, Jin-Heem Kim, C. Youm","doi":"10.5103/KJSB.2016.26.3.293","DOIUrl":"https://doi.org/10.5103/KJSB.2016.26.3.293","url":null,"abstract":"Objective: The purpose of this study was to analyze the effects of freezing of gait and visual information on the static postural control ability in patients with Parkinson ' s Disease (PD) during the bipedal stance with feet together. Method: This study included a total of 36 patients with PD; the freezer group included 17 PD patients (age: 69.3 ± 6.2 yrs, height: 159.6 ± 9.0 cm, weight: 63.4 ± 9.78 kg) and the nonfreezer group included 19 PD patients (age: 71.4 ± 5.6 yrs, height: 155.8 ± 7.1 cm, weight: 57.7 ± 8.6 kg). Static postural control ability was analyzed using variables of center of pressure (COP) and dividing by mediolateral, anteroposterior, and integration factors during a bipedal stance with the eyes open and closed. Results: Freezers and nonfreezers showed increases in anteroposterior velocity, mediolateral velocity, averaged velocity, and mediolateral 95% edge frequency when visual information was blocked. Additionally, freezers had greater anteroposterior range, 95% confidence ellipse area, and COP anteroposterior mean position than nonfreezers. Conclusion: Freezers and nonfreezers showed a reduction in static postural control ability when visual information was blocked. Additionally, the results of this study found a significant difference in static postural control ability between freezers and nonfreezers with PD. In particular, anteroposterior range, 95% confidence ellipse area, and COP anteroposterior mean position might be used to distinguish between freezers and nonfreezers with PD.","PeriodicalId":306685,"journal":{"name":"Korean Journal of Sport Biomechanics","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131685148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Relationship between Dimensionless Leg Stiffness and Kinetic Variables during Gait Performance, and its Modulation with Body Weight","authors":"Seung-Hyun Hyun, Che-Cheong Ryew","doi":"10.5103/KJSB.2016.26.3.249","DOIUrl":"https://doi.org/10.5103/KJSB.2016.26.3.249","url":null,"abstract":"Objective: This purpose of this study was to analyze the relationship between dimensionless leg stiffness and kinetic variables during gait performance, and its modulation with body weight. Method: The study sample consisted of 10 young women divided into 2 groups (Control, n=5 and Obese, n=5). Four camcorders (HDR-HC7/HDV 1080i, Sony Corp, Japan) and one force plate (AMTI., USA) were used to analyze the vertical ground reaction force (GRF) variables, center of pressure (COP), low limb joint angle, position of pelvis center and leg lengths during the stance phase of the gait cycle. Results: Our results revealed that the center of mass (COM) displacement velocity along the y axis was significantly higher in the obese group than that in control subjects. Displacement in the position of the center of the pelvis center (Z-axis) was also significantly higher in the obese group than that in control subjects. In addition, the peak vertical force (PVF) and dimensionless leg stiffness were also significantly higher in the obese group. However, when normalized to the body weight, the PVF did not show a significant betweengroup difference. When normalized to the leg length, the PVF and stiffness were both lower in the obese group than in control subjects. Conclusion: In the context of performance, we concluded that increased dimensionless leg stiffness during the gait cycle is associated with increased velocity of COM, PVF, and the change in leg lengths (%).","PeriodicalId":306685,"journal":{"name":"Korean Journal of Sport Biomechanics","volume":"174 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116125555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Kinematic Factors of Physical Motions During Air Pistol Shooting","authors":"M. Kim","doi":"10.5103/KJSB.2016.26.2.197","DOIUrl":"https://doi.org/10.5103/KJSB.2016.26.2.197","url":null,"abstract":"Objective: The purpose of this study was to analyze the kinematic factors of motion during air pistolshooting.Method: This study aimed to investigate changes in forces during movement and determine the factorsthat affect changes in force during the first, middle, and last periods of shooting an air pistol. Two groundreaction force systems (force platform), SCATT (a shooting training system), and EMG (electromyogram)to measure the action potentials in the muscles of the upper body were used in this study. Four universityair pistol players (age: 19.75 years, height: 175.50 cm, body mass: 69.55±11.50 kg, career length: 6.25±6years) who are training to progress to a higher rank were enrolled.Results: In terms of the actual shooting results, the mean score in the middle section was 42.48±1.74points, higher than those in the first and the last periods when using SCATT. The gunpoint moved 13.48mm more vertically than horizontally in the target trajectory. With respect to action potentials of musclesmeasured using EMG, the highest action potentials during the aiming-shooting segments, in order higherto lower, were seen in the trapezius (intermediate region), trapezius (superior region), deltoid (lateral), andtriceps brachii (long head). The action potentials of biceps brachii and brachioradialis turned out to be highduring grasping motion, which is a preparatory stage. During the final segment, muscle fatigue appearedin the deltoid (lateral), biceps brachii (long head), brachioradialis, and trapezius (intermediate region). Interms of the ground reaction force, during the first period of shooting, there was a major change in theoverall direction (left-right Fx, forward-backward Fy, vertical Fz) of the center of the mass.Conclusion: The development and application of a training program focusing on muscle groups withhigher muscle fatigue is required for players to progress to a higher rank. Furthermore, players can improvetheir records in the first period if they take part in a game after warming up sufficiently before shooting inorder to heighten muscle action potentials, and are expected to maintain a consistent shooting motioncontinuously by restoring psychological stability.","PeriodicalId":306685,"journal":{"name":"Korean Journal of Sport Biomechanics","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122083043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative Analysis of Gait Parameters and Symmetry between Preferred Walking Speed and Walking Speed by using the Froude Number","authors":"Sihyun Yoo, Jongbin Kim, Jiseon Ryu, Sukhoon Yoon, Sang-Kyoon Park","doi":"10.5103/KJSB.2016.26.2.221","DOIUrl":"https://doi.org/10.5103/KJSB.2016.26.2.221","url":null,"abstract":"Walking is the most basic mode of transportation of humans. It is a complex motion produced by the coordination and control of the upper and lower limb joints. Gait varies depending on the physical traits, habits, walking speed, and personality (Shin, Lee, & Kwon, 2008; Tirosh & Sparrow, 2005; Whittle, 1990). So far, the symmetrical movements of both legs have been regarded as normal gait. However, even non-handicapped individuals can develop asymmetrical gait because of physical traits or differences in function between both feet (Sadeghi, Allard, Prince, & Labelle, 2000). Echeverria, Rodriguez, Velascol, and Alvarez-Ramirez (2010) reported that around 10% of cases of asymmetrical gait could be observed in nonhandicapped individuals. Improper gait and habits can cause diseases in body structure such as bones and muscles (Moon, 2005; Scott & Winter, 1990). In particular, asymmetrical gait can cause body fatigue and can directly cause disabilities or diseases because abnormal loads during gait can travel all the way to the brain (Nigg, De Boer, & Fisher, 1995). Asymmetry produced while walking is used to evaluate gait. In their study, Perttunen, Anttila, Sodergard, Merikanto, and Komi (2004) examined the asymmetrical gait of patients with lower limb length discrepancies and reported that weight bearing was higher on the longer leg. In another study, Lugade, We, Jewett, Collis, and Chou (2010) reported that surgery improved asymmetrical gait in patients with hip osteoarthritis. Hyun and Ryew (2014) investigated the correlation between heel height and gait in young female adults and reported that heel height was directly proportional to asymmetry and observed bilateral asymmetry. Roth, Mervitz, Mroczek, Dugan, and Suh in 1997; Patterson et al. in 2008; and Nam, Kim, and An in 2010 reported that bilateral asymmetry increases with decreased walking speed in stroke KJSB Korean Journal of Sport Biomechanics 2016; 26(2): 221-228 http://dx.doi.org/10.5103/KJSB.2016.26.2.221 http://e-kjsb.org eISSN 2093-9752 ORIGINAL","PeriodicalId":306685,"journal":{"name":"Korean Journal of Sport Biomechanics","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129413344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Age-related Changes in Multi-finger Synergy during Constant Force Production with and without Additional Mechanical Constraint","authors":"Y. Park, H. Kwon, K. Koh, J. Shim","doi":"10.5103/KJSB.2016.26.2.175","DOIUrl":"https://doi.org/10.5103/KJSB.2016.26.2.175","url":null,"abstract":"Department of Physical Education, College of Performing Arts and Sports, Hanyang University, Seoul, South Korea The Movement Science Center of Research Institute for Sports Science and Sports Industry, Hanyang University, Seoul, South Korea Department of Kinesiology, School of Public Health, University of Maryland, College Park, MD, USA Department of Mechanical Engineering, Kyunghee University, Global Campus, Kyung-gi, South Korea Fischell Department of Bioengineering, University of Maryland, College Park, MD, USA Neuroscience and Cognitive Science (NACS) Program, University of Maryland, College Park, MD, USA","PeriodicalId":306685,"journal":{"name":"Korean Journal of Sport Biomechanics","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124024733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of ProBody Massage on Body Alignment and Plantar Pressure Balance in Middle-aged Men with Musculoskeletal Diseases","authors":"Se-Jin Oh, J. Lee","doi":"10.5103/KJSB.2016.26.2.213","DOIUrl":"https://doi.org/10.5103/KJSB.2016.26.2.213","url":null,"abstract":"In this era, the middle-aged can be considered central to the overall advancement of society, as they provide a driving force for society as a whole (Jung, 2013). Inspection of recent demographics in South Korea revealed a gradual increase in the proportion of middle-aged men within the total population. According to data from Statistics Korea, the middle-aged population of 40to 59-year-olds in 2010 was 14.76 million, which was about 30% of the total population, and the number of middle-aged men was 7.36 million, which was approximately 15% of the total population (Statistics Korea, 2013). Recently, the incidence of factors threatening the health of middleaged men, such as overwork, stress, smoking, and excessive alcohol consumption, has increased. These factors elevate the risk of hypertension, diabetes, and musculoskeletal diseases. In particular, office workers are known to develop more musculoskeletal diseases if they sit at a computer for long periods with incorrect posture (Lee, 2007; Ong, Chia, Jeysratnam, & Tan, 1995). Since musculoskeletal diseases became recognized as work-related disease in 1996, their incidence has steadily increased (Jeong, 2010), as has the proportion of total work-related diseases accounted for by musculoskeletal diseases. Consequently, systems to prevent musculoskeletal disease were introduced in 2003 for the benefit of business owners and workers alike (Seo, 2012). In 2009, musculoskeletal diseases accounted for 2,915 (33.4%) of 8,721 cases of work-related disease (Kim, Hwang, & Suk, 2013). Musculoskeletal diseases occur when the body is maintained in an unbalanced state, such as when sitting with poor posture in a chair for long periods (Hwang, 2012). Habitual poor posture causes deformity of the spine and gradual development of pain, eventually causing difficulties in activities of daily living (Im, 2003). Owing to a lack of awareness about the importance of posture, the number of people with low back pain (LBP) and other spinal diseases is increasing. In particular, LBP, as the most common spinal disease in South Korea, has grown beyond a personal health issue to become a societal issue as a whole. In 2000, the Ministry of Health and Welfare reported that the production loss due to LBP was 1.3072 trillion KRW (Ministry of Health and Welfare, 2000). With the spine at the center, our bodies should be balanced with left-right symmetry of the shoulders, pelvis, and lower limbs. When the proper posture is not maintained, this leads to a state of physical imbalance. Physical imbalance can generate pain and imbalance of the lower limbs, causing problems in the position of the feet or legs, or can cause KJSB Korean Journal of Sport Biomechanics 2016; 26(2): 213-220 http://dx.doi.org/10.5103/KJSB.2016.26.2.213 http://e-kjsb.org eISSN 2093-9752 ORIGINAL","PeriodicalId":306685,"journal":{"name":"Korean Journal of Sport Biomechanics","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133385594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Immediate Effects of Ankle Restriction Using an Elastic Band on Ground Reaction Force during a Golf Swing","authors":"Kyungock Yi, O. Kim","doi":"10.5103/KJSB.2016.26.2.191","DOIUrl":"https://doi.org/10.5103/KJSB.2016.26.2.191","url":null,"abstract":"Purpose: The purpose of this study was to analyze the immediate effects of ankle restriction with an elastic band on ground reaction force during a golf swing. Method: There were five subjects who were teaching pros with an average golf score of 75. A force platform (9281B, Switzerland) was used. The independent variable was the presence of an elastic band. The dependent variables were three-dimensional ground reaction forces to analyze the transfer of momentum with the timing, control and coordination of the three forces. A paired t-test within subject repeated measure design was used via an SPSS 20.0. Results: Wearing an elastic band around one`s ankles significantly makes shorter time differences between the moment of cross anterior / posterior forces and vertical force and median value of anterior / posterior forces during the backswing, between medial and lateral maximum and anterior / posterior force from the top of the back swing to the mid down swing, and creates an anterior / posterior maximum force. Conclusion: Wearing an elastic band around one`s ankles affects control and coordination between three dimensional forces, and anterior force power according to each phase of the golf swing.","PeriodicalId":306685,"journal":{"name":"Korean Journal of Sport Biomechanics","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124113517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}