DEVELOPMENT OF SOFTWARE FOR ANALYZING STEP LENGTH COURSES IN SPRINT DASH WITH THE USE OF THE LASER VELOCITY MEASURING DEVICE AND DIGITAL VIDEO CAMERA

We have developed software (sprint-performance analyzer: SPA) for estimating step length courses in sprint dash with the use of the laser velocity measuring device and digital video camera. It gives a quick feedback to coaches and athletes and helps to evaluate performance of athletes. In this research, we compared time of analyzing by the SPA with that not utilizing the software. In addition, step length courses estimated in this measuring method were reexamined. A statistical analysis was done between estimated step length (ESL) by SPA and actual step length (ASL) by using Two-dimensional motion analysis method. Time of analyzing by SPA was 10 minutes/trial, which was shorter than 50 minutes/trial of that not utilizing the software. There were very small differences (?d) between the filtered ESL and the filtered ASL at respective trials (?d=0.00-0.04m)

KINEMATIC AND TECHNICAL FACTORS FOR ACCELERATION OF WHOLE BODY IN ROTATIONAL SHOT PUT TECHNIQUE

The aim of this study was to gain the knowledge about kinematic and technical parameters required for acceleration of whole body in rotational shot put technique, using three-dimensional motion analysis. 12 male shot putters participated this study. From the results, linear momentum during double support phase (DSP) (r = 0.64, 0.79, p \u3c 0.05, 0.01) and angular momentum during flight phase (FP) and 2nd single support phase (SSP2) (r = 0.58-0.72, p \u3c 0.05, 0.01) were closely related with throwing record, and these parameters would indicate the acceleration of whole body. In addition, path length of center of gravity at DSP related with linear momentum (r = 0.75, p \u3c 0.01). And the velocity of right toe, right elbow and left heel were closely related with angular momentum during FP and second single support phase (SSP2). These results can be concluded that enhancement these parametars will be effective techniques for acceleration of whole body

FEATURES OF INVULERSE PENDULUM MODEL USING HIGH-SPEED RUN-UP IN JAVELIN THROWING

This study uses three-dimensional motion analysis to determine features of the throwing motion in male javelin throwers. Run-up speeds were compared and features of the inverse pendulum model were determined using three-dimensional motion analysis. The results showed that run-up speed correlated with throwing distance. As run-up speed increased, the pendulum angle at L-on enlarged and tilted backwards (p < .01) after the width of the pendulum increased during the double-support phase. We presumed that the enlarged backward tilt converted a large amount of energy to increase the speed of run-up at L-on

Breath Hydrogen Gas Concentration Linked to Intestinal Gas Distribution and Malabsorption in Patients with Small-bowel Pseudo-obstruction

Background: The patient with colonic obstruction may frequently have bacterial overgrowth and increased breath hydrogen (H2) levels because the bacterium can contact with food residues for longer time. We experienced two cases with intestinal obstruction whose breath H2 concentrations were measured continuously.Case 1: A 70-year-old woman with small bowel obstruction was treated with a gastric tube. When small bowel gas decreased and colonic gas was demonstrated on the plain abdominal radiograph, the breath H2 concentration increased to 6 ppm and reduced again shortly.Case 2: A 41-year-old man with functional small bowel obstruction after surgical treatment was treated with intravenous administration of erythromycin. Although the plain abdominal radiograph demonstrated a decrease of small-bowel gas, the breath H2 gas kept the low level. After a clear-liquid meal was supplied, fasting breath H2 concentration increased rapidly to 22 ppm and gradually decreased to 9 ppm despite the fact that the intestinal gas was unchanged on X-ray. A rapid increase of breath H2 concentration may reflect the movement of small bowel contents to the colon in patients with small-bowel pseudo-obstruction or malabsorption following diet progression.Conclusions: Change in breath H2 concentration had a close association with distribution and movement of intestinal gas

Extensive Atrophic Gastritis Increases Intraduodenal Hydrogen Gas

Objective. Gastric acid plays an important part in the prevention of bacterial colonization of the gastrointestinal tract. If these bacteria have an ability of hydrogen (H2) fermentation, intraluminal H2 gas might be detected. We attempted to measure the intraluminal H2 concentrations to determine the bacterial overgrowth in the gastrointestinal tract. Patients and methods. Studies were performed in 647 consecutive patients undergoing upper endoscopy. At the time of endoscopic examination, we intubated the stomach and the descending part of the duodenum without inflation by air, and 20 mL of intraluminal gas samples of both sites was collected through the biopsy channel. Intraluminal H2 concentrations were measured by gas chromatography. Results. Intragastric and intraduodenal H2 gas was detected in 566 (87.5%) and 524 (81.0%) patients, respectively. The mean values of intragastric and intraduodenal H2 gas were 8.5 ± 15.9 and 13.2 ± 58.0 ppm, respectively. The intraduodenal H2 level was increased with the progression of atrophic gastritis, whereas the intragastric H2 level was the highest in patients without atrophic gastritis. Conclusions. The intraduodenal hydrogen levels were increased with the progression of atrophic gastritis. It is likely that the influence of hypochlorhydria on bacterial overgrowth in the proximal small intestine is more pronounced, compared to that in the stomach