[3. ACCELERATION SLED PULL Dragging 90 pounds of weight attached to a sled, Crawford does two 15-yard sprints, then removes the straps and does a 15-yard sprint with no resistance. Three sets.] I started at 70 pounds, and it took me a month to get to 90, ... Having the sled pulling me back forces me to use the correct running form for speed and acceleration.
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