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Motor Control Commons™

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Indiana State University

Articles 1 - 7 of 7

Full-Text Articles in Motor Control

Trunk Rotation Movement In Tennis Backhand, Hsin-Chen Fanchiang Aug 2009

Trunk Rotation Movement In Tennis Backhand, Hsin-Chen Fanchiang

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This study analyzed the effects of gender, strike technique, power level, and trial factors on tennis athletes performing backhand strokes with the incoming ball launched by a serving-stand. Five male and five female college tennis athletes volunteered as subjects. Each subject had 25 data points including joint centers of right and left sides for the 5th metatarsal, lateral malleolus, knees, hips, shoulders, elbows, wrists and MP joints, chin, forehead, seven points on the racket (handle, head, neck, upper right and left rims, and lower right and left rims), and the ball were recorded by two video cameras (60Hz). Each of …

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Effects Of An Angled Starting Block On Sprint Start Kinematics, Nathaniel A. Brown Dec 2007

Effects Of An Angled Starting Block On Sprint Start Kinematics, Nathaniel A. Brown

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The purpose of the present study was to investigate the effects of an angled proto-type starting block on sprint start kinematics. The angled starting block rotates the foot medially at a 16 degree angle, which emulates the 16 degree angle of the ankle on the medial axis of the foot. This 16 degree should allow for the athlete to apply more force against the block, resulting in a higher velocity at take-off and a faster block clearance time. In the present study, six female collegiate sprinters were filmed and analyzed using the angled starting block and a standard starting block. …

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Physiological Determinants Of Rowing Performance, Chun-Jung Huang May 2005

Physiological Determinants Of Rowing Performance, Chun-Jung Huang

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The aim of this study was to examine ten male rowers and seven female rowers on a number of physiological variables to determine which may account for variation in 2000m rowing performance. Male rowers' mean (±SD) age, body weight, and height were 17.4±0.7 years, 75.2± 11.2 kg, and 181.4±6.1 cm, and female rowers' mean (±SD) age, body weight, and height were 17.3±0.6 years, 72.4±14.9 kg, and 168.3±6.7 cm respectively. The participants were tested on 2000m rowing ergometer, vertical jump, inverted row, leg press, and back hyperextension. Height, vertical jump, inverted row, and leg press correlated with 2000m rowing performance time …

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Muscle Vibration's Effect On The Threshold Frequency Of An Electrically Induced Muscle Cramp, Joshua D. Williamson Dec 2004

Muscle Vibration's Effect On The Threshold Frequency Of An Electrically Induced Muscle Cramp, Joshua D. Williamson

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Objective: The purpose of this study was to evaluate the effect of muscle vibration on the threshold frequency of an electrically-induced muscle cramp of the flexor hallucis brevis. Design and setting: This study used a 2 x 2 factorial design study. The independent variables consisted of treatment ( control and vibration) and time (pretest and post-test). The dependent variable was the threshold frequency of an electrically induced muscle cramp. Subjects: 16 healthy individuals, aged 21.6 ± 8.0 years, free from any lower extremity neurological, muscular, or vascular pathology were used in this study. Methods: Subjects reported on three consecutive days …

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Self Defense Instruction And Its Impact On Physical Self-Efficacy Of Female Cadets At The United States Military Academy, Jason Matthew Winkle May 2003

Self Defense Instruction And Its Impact On Physical Self-Efficacy Of Female Cadets At The United States Military Academy, Jason Matthew Winkle

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The purpose of this study was to determine the impact of self defense instruction of female cadets at the United States Military Academy on their physical self-efficacy. All95 female cadets enrolled in PE115 during the fall of2002 were surveyed on the first and last day of class to determine their levels of perceived physical ability (PPA) and physical self-presentation confidence (PSPC). Both the PP A and the PSPC are subscales ofthe Physical Self-Efficacy Scale (PSE). Completed data were collected from 80 (84 percent) ofthe subjects. Statistical data analysis included descriptive statistics and a 2x2 multivariate analysis of variance (MANOV A). …

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The Effect Of Local Muscle Fatigue On The Threshold Frequency Of An Electrically Induced Cramp, Marcus B. Stone May 2003

The Effect Of Local Muscle Fatigue On The Threshold Frequency Of An Electrically Induced Cramp, Marcus B. Stone

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Context: Muscle fatigue has been implicated as a factor in the cause of exercise associated muscle cramping. In an electrically induced muscle cramp, threshold frequency (TF) is the frequency of stimulation at which the cramp originates. Therefore, the TF of a fatigued muscle should shift from a previously established baseline. Objective: To determine the effect of local muscle fatigue on TF of electrically induced muscle cramp. Design: A 2 X 2 repeated measures design was used for this study. The independent variables were test (pre- and post-) and condition (control and fatigue). The dependent variable was TF of an electrically …

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Focal Temperature Change Facilitates The Peak-To-Peak Soleus Hoffmann Reflex And Muscle Response, Bentley Andrew Krause May 2002

Focal Temperature Change Facilitates The Peak-To-Peak Soleus Hoffmann Reflex And Muscle Response, Bentley Andrew Krause

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Objective: Cryotherapy is a widely used rehabilitative modality in sports medicine. Cooling joint tissues has been observed to facilitate active exercise following injury. Mechanisms effecting motoneuron recruitment during and following cryotherapy are presumed to be both local and central in nature. Focal cooling facilitates motoncuron pool recruitment and may alter the excitability of motoncurons. The purpose of this investigation was to determine if changes in focal temperature alter the characteristics of the maximum peak-to-peak Hoffmann reflex (Hmax) and muscle response (Mmax). Design and setting: A 4x5 factorial design with repeated measures on time was used in this study. Hmax and …

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