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Kinesiology

2014

Selected Works

Joseph Hamill

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Articles 1 - 2 of 2

Full-Text Articles in Life Sciences

Elite Female Tae Kwon Do Athletes Have Faster Reaction Time And Longer Movement Time Than Males During A Striking Kick, Ulysses Fernandes Ervilha, Valmar Fernandes Da Silva, Rubens Correa Araújo, Luis Mochizuki, Joseph Hamill Dec 2013

Elite Female Tae Kwon Do Athletes Have Faster Reaction Time And Longer Movement Time Than Males During A Striking Kick, Ulysses Fernandes Ervilha, Valmar Fernandes Da Silva, Rubens Correa Araújo, Luis Mochizuki, Joseph Hamill

Joseph Hamill

Background & Study Aim: An important aspect of ap bal ap dolio tchagui kick in tae kwon do is that it is usually performed in reaction to a signal or event. That is, given a specific stimulus (i.e. the movement of the opponent), the tae kwon do athlete must react as quickly and accurately as possible to the stimulus. Reacting to a stimulus requires preparation and it is essential to determine this preparation of an elite athlete to perform a task. Therefore, to investigate this movement a reaction time paradigm is appropriate wherein the athlete accomplishes the kick in response to a stimulus. The study investigates the processing, reaction and motor response of male and female athletes in an ecological task. The purpose of this study was to verify the authenticity of the two hypotheses: (1) that the pre-motor time, response time and motor time would the same for males and females; (2) that the magnitudes of the muscle activation would be different between males and females. Materials & Method: The main method is an analysis and comparative study of empirical data. We collected data on 13 Brazilian national calibre tae kwon do athletes (6 male and 7 female) when performing a simple reaction time kicking manoeuvre. The experimental equipment included EMG electrodes placed on six muscles and an electrogoniometer placed on the knee of the kicking limb. Results: We found that pre-motor and response times were faster for females than males for several muscles but the faster movement time for males ...


Acute Effect Of Different Minimalist Shoes On Foot Strike Pattern And Kinematics In Rearfoot Strikers During Running, Roberto Squadrone, Renato Rodano, Joseph Hamill, Ezio Preatoni Dec 2013

Acute Effect Of Different Minimalist Shoes On Foot Strike Pattern And Kinematics In Rearfoot Strikers During Running, Roberto Squadrone, Renato Rodano, Joseph Hamill, Ezio Preatoni

Joseph Hamill

Despite the growing interest in minimalist shoes, no studies have compared the efficacy of different types of minimalist shoe models in reproducing barefoot running patterns and in eliciting biomechanical changes that make them differ from standard cushioned running shoes. The aim of this study was to investigate the acute effects of different footwear models, marketed as “minimalist” by their manufacturer, on running biomechanics. Six running shoes marketed as barefoot/minimalist models, a standard cushioned shoe and the barefoot condition were tested. Foot–/shoe–ground pressure and three-dimensional lower limb kinematics were measured in experienced rearfoot strike runners while they were ...