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He agrees with Adams that the sled is best for developing acceleration.  You seldom want to pull a heavy sled past 25 yards, because that ignores how your body works, says Greco.  Once your body goes into an upright position through the transition phase of a sprint, acceleration is basically zero. The problem with using the sled this way is that if you keep pulling it, let s say for 100 yards, you re always working to drive drive drive - it s not natural. Plus you start fatiguing, and when you fatigue, you start to see a breakdown in body mechanics -it s like doing sets of 15 in the power clean. <br><br>In addition to selecting the proper running distance, an important factor in getting the most out of sprint sled training is determining how much weight to use on the sled. Says Adams,  I vary the weight depending on the kind of feedback I want to give the athlete. If I want to force him into extension, I ll add a little more weight as this will create a longer ground contact tim. <br><br>When Greco introduces sled training to his athletes, he doesn t use any additional weight.  At first I just use the weight of the sled - I just want them to feel that something is there. He adds that during practice, he varies the weight according to how the athlete is performing that day.  This is where a coach has to watch, because you don t want to see a breakdown in technique-you don t want the athlete muscling down the track. <br><br>In addition to using the sled to improve acceleration, Greco uses it with extremely heavy weights to develop strength, as a supplement to regular weight training. However, technique is also important when using the sled for this purpose.  If you re walking with the sled, you want to make certain your walk is dynamic with a long, deep step - you want to work the muscles through a long range of motion. I weigh 180 pounds, and I ve gotten up to being able to use 200 pounds. Greco notes that the intensity involved in using the sled makes it easy to overtrain and he usually doesn t use heavy sled work for longer than three weeks straight. He adds,  Powerlifand, thankfully, I have been in a good environment. <br>Whenever an athlete like Tom has extraordinary strength, the question of steroids invariably comes up.  Steroids have never been an option, says Tom.  I never even think about it. If you uat Max. Beginners use only 45 to 95 pounds. Keep the knees locked and go straight down in a very slow and controlled manner. <br> Thirty-six and forty-eight pages of advertising were put into journaliculum.<BR><B>How does your school implement the BFS program in the curriculum?<BR><BR>The coaches teach the BFS program and they use the videos. It s like putting on a clinic, but you only have an hour. A clinic lasts eight hours, so it takes about eight class periods to teach everything and teach it correctly. They don t lift for about two weeks. The kids are so antsy after that they just can t wait to get going.<BR><BR><BR>How big is your weight room?<BR><BR>We have two weight rooms-one is 40 x 70, and the other is 30 x 50.<BR><BR>Why do you have two weight rooms?<BR><BR>We needed more weightlifting classes because the kids wanted it. Having a class every day in one room wasn t enough, so the principal, the vice-principal and I made another weight room. We called BFS and bought four more squat racks and five more benches, and platforms and dumbbells and a hip sled.