Regardless of whether anyone thinks the sport of weightlifting is a strength sport or speed sport, the snatch and clean and the jerk take a specific time in motion to complete and those times must be maintained from about 80% to 100% of effort. If these times are not maintained the lift will be missed. In my opinion this makes the sport of weightlifting a speed sport. The fact that the implement used increases in mass or resistance makes no matter, because those elements of velocity must stay intact. Slower overall times (from the platform to standing up) result in the lifter not being able to lift up to their full capabilities, if those times are not as fast as the lifter is able to achieve. If the sport of weightlifting is a speed sport then it should follow that the assistance lifts should also be trained as if they were also a speed sport. If the assistance lifts are viewed as slow lifts then slow is exactly how the lifter will be training and that will be reflected in the snatch and clean and the jerk. The slower grinding squats and pulls will effect the velocity of the 1st pull and standing up with the weight out of the clean primarily. It will also effect the depth of the dip in the jerk and the amount of velocity that can be produced in the drive. Regardless of how much anyone thinks slower decelerated squats with maximal weights help the lifter, this is a grave misunderstanding of the laws of physics. All slower squats must be interpolated back to what that squat would be equivalent to in terms of the snatch and clean times in motion which is 1 second. The major difference between a 1RM back squat of 150k @ 2 seconds and a 1 second squat is 50k of non-beneficial overloading with the 150k squat and the probability that the overall time in the clean will be slower and the drive in the dip will be less effective.
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