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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 tat the intensity involved in using thesled makes it easy to overtrin and he usually doesn t use heavy sled work for longer than three weeks straight. He adds,  Powerlifters can do more of the heavy sled work, because they don t run in addition t their regular training. <br>One alternative to the sprint sled is the BFS speed harness. Instead of a sled providing the resistance, a coach or training partner holds onto the end of a rope attached to the harness and provides manual resistance. <br><br><br>Sprint Chute Training Secrets<br><br>Although both Adams and Greco tend to use the sprint chute to improve maximum running velocity (r speed-endurance as some prefer to call it), there are many other benefits.<br><br>According to Greco, because the chute can move back and forth, it creates an unstable environment that can be used to improve joint stability.  I actually like it for team sports. Take the example of football running backs who are basically running and people are hitting them from the side. I think this instability helps significantly . . . and even with sprinters, beause if you re coming off a curve and there s a gust of wind that thows you to the side, your body has to get used to that. <br><br>Another advantage of the sprint chute (ad the smaller version BFS offers called the power chute) is that it can improve running technique. Greco sometimes uses a 100-meter, rhythmical type of run.  When you have some resistance you tend to fcus on your technique a little more. What happens when your technique is not sound when you use a chute is that it feels as if you re working too hard. <br><br>How you take advantage of the many uses of BFS sprint sleds and sprint chutes depends upon the types of athletes you re working with, and of course, at what level. The bottom line is these can be vluable training devices for those who are serious about fulfilling their athletic potential. There s no argument about that!o let these athletes understand what they can bring to the program," says Madden. How has he done? "Two years ago we had the number-one ay up, so when you take the chainsoff you ll just explode right through that sticking point. This is ress bar and the thought occurred to me that this might be smething I could adapt to Olympic weightlifting, says Briggs.<BR>Brigg s first thouht was how to adapt the chains so that they wouldn t get in the way of the fet or interfere withthe lift. To ensure safety, he believed it was important to have the chains attached as far as away from the inside collars of a barbell s possible. (To do this wiqVs hxs hx~.^\s~.\IFC    $ &%# #"(-90(*6+"#2D26;=@@@&0FKE>J9?@=C  =)#)======================================