The kneeling cable crunch is a good movement but I chose declines as the best for the following reason.
While The KCC works with the function and places resistance at the PCP, the level of resistance at the PCP is less than during Declines. This is for the following reason:
KCC has the resistance pulling you UP and out of the flexed spine position.
With declines you are being pushed out of this position as well but the torso is also being pushed DOWN and out of the seated position. The fight to hold the resistance at the PCP is greater which is important because this is the position where most fibers are recruited.
The degree of stimulation at the PCP is therefore greater with declines IMO.
KCCs are a great movement though, I’m not knocking it. Jeff Willet also also highly recommends it.
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