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Full-Text Articles in Life Sciences
Quantifying Inter-Segmental Coordination During The Instep Soccer Kicks, Yumeng Li, Marion Alexander, Cheryl Glazebrook, Jeff Leiter
Quantifying Inter-Segmental Coordination During The Instep Soccer Kicks, Yumeng Li, Marion Alexander, Cheryl Glazebrook, Jeff Leiter
International Journal of Exercise Science
International Journal of Exercise Science 9(5): 646-656, 2016. In order to generate a high ball speed in soccer, the inter-segmental coordination of the kicking leg is critical. The purpose of this study was to quantify the coordination between the thigh and shank movement in the sagittal plane during instep kicks. Eleven female soccer players were video recorded using a high-speed (80 Hz) video camera during penalty kicks. Hip, knee and ankle joint centers of the right leg were digitized, and the movement was analyzed using Dartfish TeamPro (6.0). The thigh and shank segment angles were generated, and the coordination was …
Relationships Between Motor Coordination And Academic Achievement In Middle School Children, Daniel V. Chagas, Gustavo Leporace, Luiz Alberto Batista
Relationships Between Motor Coordination And Academic Achievement In Middle School Children, Daniel V. Chagas, Gustavo Leporace, Luiz Alberto Batista
International Journal of Exercise Science
International Journal of Exercise Science 9(5): 616-624, 2016. Although it is recognized that children with a marked impairment in the development of motor coordination may show difficulty in gaining academic achievement, research examining the relationship between gross motor coordination and academic achievement in children without intellectual disabilities is limited. This study aimed to examine whether gross motor coordination is associated with academic achievement among children. Middle school children (n=122) were recruited. Writing, reading, and mathematics performance were used to attribute academic achievement. Gross motor coordination was assessed using the Körperkoordinationstest für Kinder test. Pearson and partial correlations were used to …
Influence Of Baseball Catcher Mask Design, Impact Location And Ball Trajectory On Head Acceleration, Jordan Siu, Alex Okonek, Philip K. Schot
Influence Of Baseball Catcher Mask Design, Impact Location And Ball Trajectory On Head Acceleration, Jordan Siu, Alex Okonek, Philip K. Schot
International Journal of Exercise Science
International Journal of Exercise Science 9(5): 567-575, 2016. The general aim was to contrast accelerations caused by baseball impacts for different catcher mask designs. Study1 focused on impact locations for a perpendicular ball trajectory. Study2 examined perpendicular and oblique trajectories striking a single mask location. A 5.9 kg head model instrumented with a 3-d accelerometer recording at 512 Hz was mounted upright with springs in a shallow ball joint. A pitching machine fired a standard baseball at ~28 m/s for all tests. Transverse plane resultant peak acceleration was gathered from 5 trials in each experimental combination. In Study1, effects of …
Individual Differences In The Programming Of Rapid Bimanual Movements: Are Two Modes Better Than One?, Ashley N. Vander Does, David E. Sherwood
Individual Differences In The Programming Of Rapid Bimanual Movements: Are Two Modes Better Than One?, Ashley N. Vander Does, David E. Sherwood
International Journal of Exercise Science
International Journal of Exercise Science 9(3): 347-358, 2016. One of the challenges in performing simultaneous bimanual movements is to prevent interference from one limb to the other, thereby maintaining spatial accuracy in both limbs. Prior research has shown that when a longer distance movement is performed with a shorter movement, the shorter movement overshoots its target and the longer movement undershoots its target relative to control conditions where two shorter or two longer movements are made. The current experiment investigated the motor control strategies used by participants when performing simultaneous aiming movements combining both different and same distances. Participants (N …
Exercise-Induced Glycogen Reduction Increases Muscle Activity, Matthew S. Tenan, J. Troy Blackburn, Robert G. Mcmurray
Exercise-Induced Glycogen Reduction Increases Muscle Activity, Matthew S. Tenan, J. Troy Blackburn, Robert G. Mcmurray
International Journal of Exercise Science
International Journal of Exercise Science 9(3): 336-346, 2016. Intramuscular glycogen stores are an important energy source during extended bouts of strenuous exercise. A substantial reduction in glycogen could influence neural muscular drive and result in a decreasing quality of exercise performance and potentially increased injury rates. The aim of this study was to examine the effect of glycogen reduction on motor drive as determined by the surface electromyogram (EMG) amplitude and median frequency during a cycling graded exercise test. Eight trained cyclists performed a discontinuous cycling graded exercise test to exhaustion under both normal and glycogen reduced conditions. EMG …
The Acute Effect Of Pilates Exercise On Lower Extremity Maximal Strength, Heather Monger, Blain C. Harrison
The Acute Effect Of Pilates Exercise On Lower Extremity Maximal Strength, Heather Monger, Blain C. Harrison
International Journal of Exercise Science
International Journal of Exercise Science 9(3): 283-290, 2016. In recent years, the effects of chronic core training on athletic performance have been examined with mixed results; however, the acute effects of core training on athletic performance variables have yet to be examined. Therefore, the purpose of this study was to determine the relationship between an acute bout of core training and lower extremity maximal strength. Seventeen healthy males (weight 90.1 ± 17.2 kg; height 176.7 ± 11.2 cm; age 20.9 ± 1.3 years) performed maximal deadlift assessments following 2 testing conditions. A general cardiovascular warm-up was used as the control …
Poor Quality Of Instruction Leads To Poor Motor Performance Regardless Of Internal Or External Focus Of Attention, M. Jay Polsgrove, Tom E. Parry, Nathan T. Brown
Poor Quality Of Instruction Leads To Poor Motor Performance Regardless Of Internal Or External Focus Of Attention, M. Jay Polsgrove, Tom E. Parry, Nathan T. Brown
International Journal of Exercise Science
International Journal of Exercise Science 9(2): 214-222, 2016. The view that external focus of attention provides beneficial performance outcomes when compared to an internal focus of attention has been consistently supported in the movement performance literature. While type of focus has been well investigated, the current study examined the influence of quality of instruction as a variation of the type of focus. Specifically, the purpose of the study investigated how performance-enhancing instructions would differ from performance-neutral instructions on an agility performance. An agility L-run was used to measure performance in the four counterbalanced conditions: Internal-Performance Neutral (INT-PN), Internal-Performance Enhancing (INT-PE), …
The Effect Of Single-Leg Stance On Dancer And Control Group Static Balance, Elisabeth A. Kilroy, Olivia M. Crabtree, Brittany Crosby, Amanda Parker, William R. Barfield
The Effect Of Single-Leg Stance On Dancer And Control Group Static Balance, Elisabeth A. Kilroy, Olivia M. Crabtree, Brittany Crosby, Amanda Parker, William R. Barfield
International Journal of Exercise Science
International Journal of Exercise Science 9(2): 110-120, 2016. The purpose of this study was to compare kinetic differences of static balance between female dancers (D) with at least seven years of dance experience and female non-dancers (ND) who were typical college students. Participants were tested in single-leg stance. Both the dominant leg (DL) and non-dominant leg (NDL) were tested with the participants shod (S) and barefoot (BF). Kinetic variables (vertical, medio-lateral [ML], antero-posterior [AP] maximum ground reaction forces (GRF), and center of pressure (COP) ML and AP) were measured by a Bertec force platform at 1000 Hz with participants S …