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A good number for ELPF would be anything greater than 2.50 (Athletes with an ELPF less than 2.50 need to work extra hard on the quick lifts such as the Clean and Snatch). For the athletes jump height, a good performance number would be anything greater than 20 inches. <br><br>SPRINT<br> TIMER MODE<br><br>This mode is designed to accurately measure an athletes running speed. The computer is sound activated so when the coach yells  GO or blows his whistle, the time starts; and when the runner finally steps on the mat at the finish line, the time stops. <br>A feature we found impressive in this mode was it s ability to compensate for the time it takes the sound of the coach s voice (or his whistle, etc.) at the finish line, to reach the runner at the starting line. <br>The Just Jump or Run allows for a more accurate time in two ways. First, of course, is the elimination of the sound-wave, travel-time discrepancy and second, the elimination of human error due to the reaction time it takes for the coach to stop a conventional timer. <br>It is quite simple to use the Just Jump or Run for timing sprints (see illustration 3). First you need to measure the desired distance of the run (40 yards for example). Second, place the computer and mat at the finish line. Third, enter the distance of the run into the computer (this must be done in feet, so if you have 40 yards you would enter 120 feet). Now, once the runner is set, yell  GO or blow your whistle and wait for the runner to finish by stepping on the mat. <br><br>CONCLUSION<br><br>The Just Jump or Run is not just limited to the ideas presented in this article. You can make up endless drills and tests to use with it. <br>Because of it s versatility along with it s accuracy and efficiency, the Just Jump or Run is a great buy. joint.<br><br>BFS: Regarding injuries, I understand Dr. Michael Ripley works with your athletes. How has he helped your program<br>DS: I ve known Dr. Ripley for more than five years, and he is undoubtedly the best sports doctor I have had the pleasure to work with. We ve incorporated a great many of his ideas into our program; his breathing techniques for stretching are especially valuable. I would estimate some athletes I have worked with have boosted their performances by two- to three percent from following his guidelines. In my area of coaching the sprints and hurdles, that can be the difference between being first or coming in last in your event final. Dr. Ripley uses his modified active release techniques to enhance muscle functioning and also to expedite rehabilitation of injury.<br><br>BFS: What problems do you encounter with your freshman sprinters?<br>DS: A sprinter needs to have equality between their front-side and backside mechanics. What I find is that due to a lack of basic strength, our younger sprinters often have developed significantly greater backside mechanics, reducing front-side mechanics. As a result, braing action increases, severely