Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2018

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 4861 - 4890 of 62017

Full-Text Articles in Entire DC Network

Three-Dimensional Kinematics Of The Batted Ball In Baseball: The Effect Of Spin On The Ball Trajectory And Flight Distance, Hirotaka Nakashima, Gen Horiuchi, Shinji Sakurai Nov 2018

Three-Dimensional Kinematics Of The Batted Ball In Baseball: The Effect Of Spin On The Ball Trajectory And Flight Distance, Hirotaka Nakashima, Gen Horiuchi, Shinji Sakurai

ISBS Proceedings Archive

The purpose of this study was to describe the three-dimensional kinematics of batted baseballs toward the same-field, center-field, and opposite-field, and estimate the effect of ball spin on trajectory and flight distance. Two collegiate baseball players performed free-batting, and they were instructed to hit a ball as far as possible in each direction. Twenty-seven trials were analyzed, and compared the ball kinematics among three hitting directions. The mean flight distance for the center-field was greater than that of the other fields. For the same-field and opposite-field, the amount of side spin components was larger than that of the center-field. Thus, …

Go to article

Prophylactic Warm-Up Enhances Functional Movement Screen In Young Female Basketball Players, Wei-Hsiu Lin, Hsiao-Mei Weng Nov 2018

Prophylactic Warm-Up Enhances Functional Movement Screen In Young Female Basketball Players, Wei-Hsiu Lin, Hsiao-Mei Weng

ISBS Proceedings Archive

This study investigated effects of a prophylactic warm-up programme on functional movement screen (FMS) in young basketball players. Twenty-four female players in a high school basketball league were recruited and assigned to two groups. The experimental group performed prophylactic warm-up and the control group performed regular warm-up for 15 minutes per day, five days per week for 12 weeks. Seven measurements in FMS were collected before and after training. A 2-way analysis of variance (group by time) with repeated measures on the second factor was used to analyze data. There were group by time interactions in deep squat, hurdle step, …

Go to article

Kinetic Factors Differentiating Mid-To-Late Sprint Acceleration Performance In Sprinters And Soccer Players, Steffi L. Colyer, Ryu Nagahara, Yohei Takai, Aki I.T. Salo Nov 2018

Kinetic Factors Differentiating Mid-To-Late Sprint Acceleration Performance In Sprinters And Soccer Players, Steffi L. Colyer, Ryu Nagahara, Yohei Takai, Aki I.T. Salo

ISBS Proceedings Archive

High-speed running in soccer is an important skill, however, the underlying kinetic factors are not fully understood. Ground reaction forces from steps 8 to 24 of maximal-effort sprints were captured for 24 soccer players and 28 track and field athletes using 54 force plates. Correlations between discrete force variables and horizontal acceleration were assessed, and statistical parametric mapping revealed performance associations across entire waveforms. Track and field athletes produced higher forces (mean anteroposterior: 1.56 N·kg-1) across shorter contacts (0.101 s) than soccer players (1.27 N·kg-1, 0.110 s). Interestingly, the technical ability to apply force and the …

Go to article

External Moment Around The Centre Of Mass During Golf Swing In Different Weight Transfer Strategies, Yoka Izumoto, Toshiyuki Kurihara, Isaka Tadao Nov 2018

External Moment Around The Centre Of Mass During Golf Swing In Different Weight Transfer Strategies, Yoka Izumoto, Toshiyuki Kurihara, Isaka Tadao

ISBS Proceedings Archive

The purpose of this study was to investigate the external moment around the centre of mass (COM) during the golf swing in golfers using different weight transfer strategies. The swing motions of twenty-one male golfers were captured by three-dimensional motion capture system. Ground reaction force of each foot was measured. External moments were calculated as the cross-product of the position vector from the COM to centre of pressure and ground reaction force vector. The golfers were divided into two groups whether the centre of pressure positioned front (n=8) or rear (n=13) relative to the COM at the impact. The external …

Go to article

Investigating The Relationship Between Balance Assessment And Centre Of Pressure Excursion During Golf Putting, Alex Ong Nov 2018

Investigating The Relationship Between Balance Assessment And Centre Of Pressure Excursion During Golf Putting, Alex Ong

ISBS Proceedings Archive

The aim of this study was to investigate the relationship between balance assessment and centre of pressure (COP) excursion during golf putting between recreational and novice female golfers. Five novice golfers (age: 28.0±15.8 years) and six recreational golfers (age: 29.0 ± 19.2 years; handicap: 21.4 ± 10.9 strokes) participated in the study. All participants performed the Star Excursion Balance Test (SEBT) and had their COP measured on a force plate while putting a ball towards targets. Significant differences were found between recreational and novice conditions for the COP displacement and velocity excursions (p0.05).Models for predictors of the COP excursions were …

Go to article

Predictors Of Boulder Climbing Performance In Youth Boulder Climbers, Jan Votava, Matej Daniel, Martin Otahal, Patrik Kutilek Nov 2018

Predictors Of Boulder Climbing Performance In Youth Boulder Climbers, Jan Votava, Matej Daniel, Martin Otahal, Patrik Kutilek

ISBS Proceedings Archive

The purpose of this study was to determine if a simple measurement using hand dynamometer could be used as predictors of boulder climbing performance in youth climbers. The study cohort consisted of 12 competitive climbers (8 males, 4 females) who competed at European Bouldering Youth Championships (B) in Slany, Czech Republic in the year 2017. The hand grip force was measured at fingertips-thumbtip grip at three wrist positions and during free holding. The effect of hand dominance in grip strength was not observed except for free holding. It could be concluded that the elite young climbers has balanced grip strength …

Go to article

Trunk Biomechanics During Breakfall For Osoto-Gari And Its Association With Judo-Related Head Injury Risk In Novice Judokas, Sentaro Koshida, Takanori Ishii, Tadamitsu Matsuda, Toshihiko Hashimoto Nov 2018

Trunk Biomechanics During Breakfall For Osoto-Gari And Its Association With Judo-Related Head Injury Risk In Novice Judokas, Sentaro Koshida, Takanori Ishii, Tadamitsu Matsuda, Toshihiko Hashimoto

ISBS Proceedings Archive

The incidence of head injuries in novice judo practitioners is of increasing public concern in Japan. This study investigated the correlation between trunk biomechanics and judo-related head injury risk in novice judokas with the aim of developing effective injury prevention strategies. Thirty-one novice judokas were volunteered to participate the study. Three-dimensional motion analysis of the osoto-gari breakfall was performed. A multiple regression analysis was usedto test the correlation between trunk biomechanics and possible head injury risk. We found a significant correlation between the trunk COM velocity and the peak neck angular momentum (F= 13.29, df= 3, P …

Go to article

Relationship Between Deformation Of Medial Longitudinal Arch And Kinetics Of Lower Limbs During Long‐Distance Running, Kensaku Kimura, Norihisa Fujii Nov 2018

Relationship Between Deformation Of Medial Longitudinal Arch And Kinetics Of Lower Limbs During Long‐Distance Running, Kensaku Kimura, Norihisa Fujii

ISBS Proceedings Archive

The purpose of this study was to clarify the kinetic features of running motion associated with the change of the minimum value of arch height ratio. The subjects were seven male college students who had experience running 10km. By processing the shoes, deformation of the foot arch inside the shoe was measured. Kinematics and kinetics of the running motion were recorded for 5 conditions: In sequence (1) static standing posture, (2) 15 m running on the flat road, (3) 10 km running on the treadmill, (4) 15 m running on the flat road, (5) static standing posture. The results are …

Go to article

Change In Mechanical Properties Of Triceps Surae Muscle-Tendon Unit And Race Performance After 1 Year In Well Trained Distance Runners, Toshiaki Oda, Takayuki Hisano, Yu Akihara, Kazuki Kusumoto, Yu Kodama, Masaki Ishikawa Nov 2018

Change In Mechanical Properties Of Triceps Surae Muscle-Tendon Unit And Race Performance After 1 Year In Well Trained Distance Runners, Toshiaki Oda, Takayuki Hisano, Yu Akihara, Kazuki Kusumoto, Yu Kodama, Masaki Ishikawa

ISBS Proceedings Archive

The purpose of this study was to determine change in relationship between stiffness of triceps surae muscle-tendon unit and race performance after one year with continuous training in well trained long distance runners. For 9 long distance runners, official race record and stiffness indexes of both muscle and tendon were investigated in pre and post measurements (after one year). The race performance (1.9%), passive torque of ankle joint (13.2%), and muscle stiffness index (73.6%) increased significantly between pre and post. Although significant correlations were not found between increment of race performance and change in all parameters, 6 of the 9 …

Go to article

Ability To Maintain Amplitude While Performing Circles On Pommel Horse, Toshiyuki Fujihara, Takashi Kobayashi Nov 2018

Ability To Maintain Amplitude While Performing Circles On Pommel Horse, Toshiyuki Fujihara, Takashi Kobayashi

ISBS Proceedings Archive

Amplitude is an important aspect for performing circles on a pommel horse, but the ability to maintain such amplitude over the course of a long performance, say, over 10 seconds, has not been studied. This study provides pilot data for the ability to perform many circles and maintain amplitude. In all, 28 gymnasts performed as many circles as possible on a pommel horse while maintaining as great an amplitude as possible. Kinematic data were recorded using a Kinect set above the pommel horse, and the head–toe distance on a horizontal plane was computed as an amplitude variable. As a result, …

Go to article

Meta-Analysis: Fatigue Does Not Increase Lower-Limb Injury Risk, Tim L. Doyle Nov 2018

Meta-Analysis: Fatigue Does Not Increase Lower-Limb Injury Risk, Tim L. Doyle

ISBS Proceedings Archive

This study sought to resolve a long-standing debate in the literature about whether or not fatigue causes lower-limb injury. For the purposes of this research, fatigue was considered chronically (time of the season) and acutely (game time). From a possible 1349 (727 after duplicated removed) articles identified that related to lower-limb musculoskeletal injuries, 15 met inclusion criteria, which provided 21 data sets. A meta-analysis on the available data sets determined that neither acute nor chronic fatigue had any influence on the likelihood of sustaining an injury to the lower limb. Additionally, this research demonstrated that injury researchers have not traditionally …

Go to article

A Longitudinal Investigation On Drop Jump Performance-Focusing On Brain Condition During Pre-Set, Stretch Reflex And Joint Kinetics During Take-Off, Takuya Yoshida, Kazutaka Takashi, Masamichi Okudaira, Seita Kuki, Amane Zushi, Fusako Kawahara, Kodayu Zushi, Satoru Tanigawa Nov 2018

A Longitudinal Investigation On Drop Jump Performance-Focusing On Brain Condition During Pre-Set, Stretch Reflex And Joint Kinetics During Take-Off, Takuya Yoshida, Kazutaka Takashi, Masamichi Okudaira, Seita Kuki, Amane Zushi, Fusako Kawahara, Kodayu Zushi, Satoru Tanigawa

ISBS Proceedings Archive

The purpose of this study was to investigate the change in drop jump (DJ) performance with a training process that focused on the state of the brain during the pre-set phase, the stretch reflex during the take-off phase, and the joint kinetics of lower extremities during take-off phase. Three male sprinters performed DJ from a drop height of 0.6 m. We measured variables for state of the brain during the pre-set phase, stretch reflex, and kinetics of lower extremities during take-off. The results revealed that the brain showed disinhibition during the pre-set phase, and stretch reflex facilitation, and an increase …

Go to article

A Pilot Study Of Ball Impact Characteristics In Varied Ball Launched Directions In Soccer Instep Kick, Koichiro Inoue Nov 2018

A Pilot Study Of Ball Impact Characteristics In Varied Ball Launched Directions In Soccer Instep Kick, Koichiro Inoue

ISBS Proceedings Archive

The purpose of the present study was to identify the characteristics of ball impact foot motion in various ball launched directions. Eighteen trials of soccer instep kicking targeting six areas of the full-size soccer goal at 11 m, were analysed. The collision between the foot and ball was recorded using three ultra-high-speed cameras at 2000 Hz. The foot contact point on the ball and the foot swing direction had a strong correlation with the ball launch direction. It can be interpreted that the foot contact point and swing direction are essential factors to kick the ball towards the targeting direction. …

Go to article

Trunk And Lower Limb Motion And Muscle Activity Responses During High Vertical Stepping In Submerged And Non-Submerged, Koichi Kaneda Nov 2018

Trunk And Lower Limb Motion And Muscle Activity Responses During High Vertical Stepping In Submerged And Non-Submerged, Koichi Kaneda

ISBS Proceedings Archive

The purpose of this study was to investigate muscle activity of the trunk and lower extremities during high vertical stepping in submerged (aquatic) and non-submerged conditions. Twelve participants (mean age 27 years) performed a 40-cm vertical step in water-submerged and non-submerged conditions. Lower limb and trunk muscle activity was recorded using electromyography. A motion capture system was also used to detect angular displacement and forward trunk inclination angle. In submerged conditions, the hip joint demonstrated a larger range of motion, with the electromyogram revealing lower mean values and higher integrated values of muscle activity for some muscles, compared with the …

Go to article

The Symmetry Angle Identifies Less Clinically Relevant Inter-Limb Asymmetries Than The Symmetry Index In Healthy Adults, Daniel J. Glassbrook, Joel T. Fuller, Jacqueline A. Alderson, Jodie A. Wills, Tim L. A. Doyle Nov 2018

The Symmetry Angle Identifies Less Clinically Relevant Inter-Limb Asymmetries Than The Symmetry Index In Healthy Adults, Daniel J. Glassbrook, Joel T. Fuller, Jacqueline A. Alderson, Jodie A. Wills, Tim L. A. Doyle

ISBS Proceedings Archive

There are several methods for calculating inter-limb symmetry, an inter-limb difference ≥15% has been suggested as an indicator of sporting injury risk. The purpose of this study was to compare three common methods for determining symmetry: the Symmetry Index (percentage difference; SI) when referenced to the left limb (SILeft) or the average of both limbs (SIAverage), and the Symmetry Angle (vector difference; SA). 15 recreationally active participants completed a sprint protocol on a non-motorised treadmill. Accelerometers were positioned on both tibias to measure peak resultant acceleration (PRA). The SA identified less clinically relevant PRA inter-limb asymmetries …

Go to article

A Learning-Based Gait Estimation During Walking-In-Place In Vr Locomotion System, Kyung-Ryoul Mun, Hwansu Jeong, Hyungan Oh, Jinwook Kim Nov 2018

A Learning-Based Gait Estimation During Walking-In-Place In Vr Locomotion System, Kyung-Ryoul Mun, Hwansu Jeong, Hyungan Oh, Jinwook Kim

ISBS Proceedings Archive

The purpose of this study was to estimate the spatiotemporal gait parameters from step time information during walking-in-place (WIP) and body anthropometric information from a newly developed VR locomotion system using a learning-based regressor. A fully-connected feed-forward neural network model was used to predict the spatiotemporal variables of walking. The inputs of the model were the WIP features and body anthropometric data, while the outputs of the model were the spatiotemporal gait parameters of the regular walking. With the prediction accuracy of 98% or higher, the feasibility of the model has been validated. In conclusion, the model not only can …

Go to article

Kinematic Study On Seoi-Nage, Technique Comparison Of Players With Or Without Elbow Joint Injuries, Yukinori Yamamoto, Norihisa Fujii Nov 2018

Kinematic Study On Seoi-Nage, Technique Comparison Of Players With Or Without Elbow Joint Injuries, Yukinori Yamamoto, Norihisa Fujii

ISBS Proceedings Archive

The purpose of this study is to clarify how to apply Seoi-nage to reduce the occurrence of injuries in elbow joints. Five participators were male college judo athletes, one as the Uke (receiver) and other four as Tori(Thrower), two of them with pain in elbow and other two without pain. The result shows that the players without pain in elbow flexed the elbow joints greatly and lifts the Uke by not bend the hip joint too much. Two considerations about the players(Tori) with pain in elbow. 1) The movement of Nagekomi in elbow joints was different from the Uchikomi. Therefore, …

Go to article

A Study On Postural Response To Lateral Perturbation, Takuya Goto Nov 2018

A Study On Postural Response To Lateral Perturbation, Takuya Goto

ISBS Proceedings Archive

The purpose of this study was to investigate how to postural control in reactive recovery response to lateral perturbations. Twenty-one healthy young adluts participated in this experiment. Each participant was tested for twenty-four trials in which four different perturbation magnitudes and two perturbation directions (left and right) were randamly arranged. In the trials, the participants stood in a standard neutral position. In the group with large angular momentum of the whole body in the frontal plane, the peak horizontal ground reaction force towards the fall side and the peak ankle supinator torque of the fall side limb were significantly larger …

Go to article

Comparison Of Proprioception Perception Test Between Golfer And Non-Golfer Using Tilting Platform, Jun Sung Park, Jae Woo Lee, Moon-Seok Kwon, Young-Tae Lim Nov 2018

Comparison Of Proprioception Perception Test Between Golfer And Non-Golfer Using Tilting Platform, Jun Sung Park, Jae Woo Lee, Moon-Seok Kwon, Young-Tae Lim

ISBS Proceedings Archive

The purpose of this study was to test proprioception perception and compare between collegiate golfers and non-golfers using tilting platform. Sixteen male and fourteen female golfers and fifteen male and thirteen non-golfers were participated. All participants were performed perception test on the tilting platform. Frequency analysis and independent t-test were performed using SPSS 24.0. Alpha set at .05. Most participants were perceived from 1° to 2° of slopes and perceived left-right (target direction) slope than forward-backward slope. Repeated practice such as walking on the uneven ground or standing on sloped ground might help to improve proprioception perception. Further research using …

Go to article

Relation Between Release Parameters And Throwing Distance Of The Javelin Throw, Masatoshi Murakami, Masaki Ishikawa, Satoru Tanabe, Akira Ito Nov 2018

Relation Between Release Parameters And Throwing Distance Of The Javelin Throw, Masatoshi Murakami, Masaki Ishikawa, Satoru Tanabe, Akira Ito

ISBS Proceedings Archive

The present study was clarified a three-dimensional examination of the relation between the release parameters and throwing distances, in order to understand the initial flight characteristics of javelins. The subjects were 57 right-handed javelin throwers. The measured throwing distances ranged from 45.25 m to 87.17 m. The elite throwers had tendency to significant positive correlation between theoretical distance and initial velocity of javelin release. Throwers who achieved throwing distances of over 70m were observed to have throwing distances that were shorter than their theoretical distances, while those whose throwing distances were under 70 m group had throwing distances that were …

Go to article

Usa Womens Rugby Sevens Contact Injury Risk Factors, Christian Victoria, Victor Lopez Jr., Richard Ma, Meryle G. Weinstein, Patria A. Hume, Robert C. Cantu, Samuel Y. Haleem, Jessica F. Delallo, Answorth A. Allen Nov 2018

Usa Womens Rugby Sevens Contact Injury Risk Factors, Christian Victoria, Victor Lopez Jr., Richard Ma, Meryle G. Weinstein, Patria A. Hume, Robert C. Cantu, Samuel Y. Haleem, Jessica F. Delallo, Answorth A. Allen

ISBS Proceedings Archive

The purpose of the study was to identify the rates and causes of contact injuries in U.S. women’s Rugby-7s tournament players (2010-2015) and present guidelines for injury prevention to reduce the risk of injury in this emerging female contact-sport athlete. Data were captured using the Rugby Injury Survey & Evaluation (RISE) methodology. Contact injuries were frequent over the study period (direct=56%; indirect=38%, unknown=6%). Contact injuries overall were similar among positions (p

Go to article

The Effect Of A Novel Rehabilitation Device On Muscle Activation During Gait In Persons With Multiple Sclerosis, Ine Mylle, Olivia D. Perrin, Alyssa J. Rebensburg, Cathy Ruprecht, Lynn Vanwelsenaers, Kim Spranger, Randall L. Jensen, Sarah B. Clarke Nov 2018

The Effect Of A Novel Rehabilitation Device On Muscle Activation During Gait In Persons With Multiple Sclerosis, Ine Mylle, Olivia D. Perrin, Alyssa J. Rebensburg, Cathy Ruprecht, Lynn Vanwelsenaers, Kim Spranger, Randall L. Jensen, Sarah B. Clarke

ISBS Proceedings Archive

This study examined the acute effect of a novel rehabilitation device, NewGait™, on muscle activation in persons with Multiple Sclerosis. Through electromyography, muscle activation of the vastus medialis (VM), gastrocnemius lateralis (GL) and tibialis anterior (TA) was measured in seventeen patients (n=17). Three trials were conducted in each condition: a 10-meter control walk and 10-meter NewGait™ walk. Results showed a non-significant change in muscle activity with moderate effect sizes in the right VM (increase of 39.72% MVC, p=0.082, d=0.626) and right TA (decrease of 12.71% MVC, p=0.069, d=0.427). In general, no change in muscle activation was noted when wearing the …

Go to article

Biomechanical Contact Injury Influences In Usa Mens Rugby-7s, Victor Lopez Jr., Richard Ma, Meryle G. Weinstein, Patria A. Hume, Robert C. Cantu, Christian Victoria, Samuel Y. Haleem, Jessica F. Delallo, Answorth A. Allen Nov 2018

Biomechanical Contact Injury Influences In Usa Mens Rugby-7s, Victor Lopez Jr., Richard Ma, Meryle G. Weinstein, Patria A. Hume, Robert C. Cantu, Christian Victoria, Samuel Y. Haleem, Jessica F. Delallo, Answorth A. Allen

ISBS Proceedings Archive

The aim of this study was to prospectively report injury incidence and contact mechanisms in U.S. men’s under-19 to elite Rugby-7s players (n=852) over 2010-2015, using the Rugby Injury Survey & Evaluation (RISE) methodology. Contact injuries occurred with frequency (Overall, including time-loss and medical attention=55.4/1000ph; time-loss=17.2/1000ph; P

Go to article

Comparison Of World Elite And Japanese Elite Throwers In The Discus Throw, Kei Maeda, Keigo Byun Ohyama, Jun Mizushima, Daisuke Yamamoto, Kenichi Hirose, Ryosuke Kajitani, Mitsugi Ogata Nov 2018

Comparison Of World Elite And Japanese Elite Throwers In The Discus Throw, Kei Maeda, Keigo Byun Ohyama, Jun Mizushima, Daisuke Yamamoto, Kenichi Hirose, Ryosuke Kajitani, Mitsugi Ogata

ISBS Proceedings Archive

The aim of this study is to clarify the differences between world elite and Japanese elite throwers in the discus throw by comparing their hip-shoulder and shoulder-arm separation angles. The performances of 12 male world elite discus throwers (the World group) and 12 male Japanese elite discus throwers (the National group) were analysed. The hip-shoulder and shoulder-arm separation through the throwing motion were greater in the World group than in the National group. In the World group, the hip-shoulder separation reached its local maximum at the middle of 2nd single support phase, and the shoulder-arm separation reached its local maximum …

Go to article

Behaviour Of The Pole In Pole Vault, Takafumi Kageyuki, Takeo Matsubayashi, Keigo Byun Ohyama, Kiyonobu Kigoshi Nov 2018

Behaviour Of The Pole In Pole Vault, Takafumi Kageyuki, Takeo Matsubayashi, Keigo Byun Ohyama, Kiyonobu Kigoshi

ISBS Proceedings Archive

This study clarified behavior of the pole during vaulting. Eight male vaulters (4.60 m-5.77 m: personal best record) vaulted over a closs bar with run-up and pole in the same set up as competitions. Three-dimensional coordinates of reflective markers attached on body and the pole were collected by a motion capture system (250Hz). The results showed: (1) the height of the upper tip of the pole was temporarily lower than the instant of pole plant (PP) between PP and maximum pole bending (MPB) for the top three participants who recorded the highest maximum height; (2) the turning angle at MPB …

Go to article

Effects Of Midsole Thickness On Single Leg Drop Landing Ground Reaction Force And Dynamic Stability, Diana Soares, Laura Charalambous, Pedro Rodrigues, Andrew Mitchell Nov 2018

Effects Of Midsole Thickness On Single Leg Drop Landing Ground Reaction Force And Dynamic Stability, Diana Soares, Laura Charalambous, Pedro Rodrigues, Andrew Mitchell

ISBS Proceedings Archive

Dynamic instability and high loading rates are associated with athletic injuries. Research is conflicting regarding the effect of midsole cushioning on ground reaction force variables. This study aimed to investigate the effect of athletic footwear midsole thickness on vertical force and dynamic stability in single leg 0.25 m drop landings. Eleven male field sports players performed 5 dominant and 5 non-dominant leg drop landings onto a force plate. The landings were performed barefoot and wearing four shoes of differing midsole thicknesses. Significantly larger vertical forces and rates of loading were found in the barefoot and minimalist conditions, compared to the …

Go to article

Development Of A Comprehensive Measurement System Of Shoe Insoles On Dynamic Human Action, Motohide Arayama Nov 2018

Development Of A Comprehensive Measurement System Of Shoe Insoles On Dynamic Human Action, Motohide Arayama

ISBS Proceedings Archive

The present study aimed to produce a new comprehensive measurement system to clarify the effect of shoe insoles on human dynamic action such. This measuring system includes 3D foot scanner and foot pressure mat combined with strength measurement device. The latter combined device allowed measuring the underneath foot pressure change during strength exertion. Through a pilot work, we tried to extract the effect of insoles on maximum back strength exertions. Among five types of insoles, three participants consistently exhibited the largest back strength when wearing an insole having serially support three arches in the hind foot. This finding might confirm …

Go to article

Ankle Bracing's Effect On Lower Extremity Electromyographic Activity And Vertical Ground Reaction Force During Jump Landings - Pilot Study Results, Zachariah J. Henderson, Paolo Sanzo, Carlos Zerpa Nov 2018

Ankle Bracing's Effect On Lower Extremity Electromyographic Activity And Vertical Ground Reaction Force During Jump Landings - Pilot Study Results, Zachariah J. Henderson, Paolo Sanzo, Carlos Zerpa

ISBS Proceedings Archive

Ankle braces are often worn to prevent ankle injuries. Evidence supports their ability to prevent ankle injuries; however, the effects that ankle braces have on proximal biomechanics and injuries is unclear. This pilot study explored the effects of ankle braces on lower extremity electromyographic (EMG) activity and vertical ground reaction force (vGRF) during a jump landing. Ten healthy individuals completed 3 maximum vertical jumps under 3 bilateral conditions (no braces, softshell (AE) braces, and semi-rigid (T1) braces). Mean EMG activity and peak vGRF was recorded from the dominant leg at landing. No significant differences in lower extremity EMG activity or …

Go to article

Dynamic Gear Ratio In Children And Adults During Walking And Implications For Muscle Mechanical Efficiency, Bill Baltzopoulos Nov 2018

Dynamic Gear Ratio In Children And Adults During Walking And Implications For Muscle Mechanical Efficiency, Bill Baltzopoulos

ISBS Proceedings Archive

Human movement is the result of joint rotations. Muscles provide the "engine" for movement acting with a leverage or moment arm around joint axes of rotation. This leverage in combination with the external leverage provided by the environment has important implications for muscle length and shortening velocity, which, in turn, affects its capability to generate forces and transmit them to the skeleton. The main aim of this work was to gain a better understanding of how skeletal geometry and muscle leverage determine muscle function and movement. Ten children (Age: 9.2±1.3 years, Height: 1.36±0.04, Mass: 30.61±5.91) and 12 adults (Age: 27.4±2.6 …

Go to article

Method Evaluation To Determine Hydration States Of Tendons By Using Mri, Bjoern Braunstein, Luisa Wendeler, Kilian Weiss, Hans Braun, Dirk Mueller, Anja Niehoff, Kirsten Albracht Nov 2018

Method Evaluation To Determine Hydration States Of Tendons By Using Mri, Bjoern Braunstein, Luisa Wendeler, Kilian Weiss, Hans Braun, Dirk Mueller, Anja Niehoff, Kirsten Albracht

ISBS Proceedings Archive

Due to the fact that water content is a determinant of the material properties of tendons and therefore might affect sports performance and the risk of injury, the purpose of this pilot study was to evaluate the reliabilityand sensitivity of a MRI based method to quantify content of a tendon. For this pilot study twenty porcine digital flexor tendons were chosen. All samples were examined on a MR scanner using three 3D ultra-short echo time sequences. With the applied sequences it was possible to determine a decrease in water content of the tendons. In addition, the methods showed a good …

Go to article

First Prev Next Last