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Articles by Morteza Shahbazi Moghaddam
Total Records ( 2 ) for Morteza Shahbazi Moghaddam
  Morteza Shahbazi Moghaddam and Fraydoon Javashi
  This study examined the velocity, acceleration, ground reaction, stopping, and take-off forces, during running in a hundred meter event. An electronic telemetry system was designed and constructed for kinematic investigations, while videography was used to analyze each stride kinetic characteristics. During the constant speed, the ground reaction force and also stopping and takeoff force, mean energy and power consumption in each stride were also estimated. The performance criterion measure was time to each 10m. We have used Microsoft Excel for tracing the variation of velocity and acceleration of each subject. Three male sprinters (top national team) volunteered as subjects for the study. The sprinter`s record was 10.8 second in 100 meter run. The study demonstrate how the velocity increases widely at the beginning, the remains constant for sometime then decreases, when the runner reaches the end of the run. On the contrary, the acceleration is, maximum, just at the take-off, then decrease to zero when the sprinter reaches to his maximum velocity, then decelerates arriving to the end of run. The results on force measurements showed that the sprinter with larger strides presents larger ground reaction, stopping, and take-off forces which agree well with what the other researchers have obtained.
  Morteza Shahbazi Moghaddam and Ross H. Sanders
  A new mathematical mode for studying hydrodynamic force was developed. The purpose of this study was to present a simple, inexpensive, reliable and less complicated methods. In order to verify the proposed model, 5 male recreational swimmers ranging in age from 20 to 25 years and in mass from 71 to 82 kg have been served in our study. They were requested to swim a 10-meter distance as fast as they could and three to five trials with enough rest in between. They have also been instructed to glide at end of 10m swim, by whistling, until still position. The time of 10m swim and the glided distance were measured with reasonable precision (10-2 Sec 10-2 m, respectively). One of the elite subjects was requested to perform swimming with different speeds in order to achieve different characteristic curves as model. The data collected were then used in proposed formulae in different approaches for achieving velocity, acceleration, propulsive or resistive forces of the subjects, The results obtained agree well with the results obtained by other researchers with complicated and expensive systems.
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