In Reply To:
Paulo,
I am going to have to disagree with you here. I submit that the hip based motion that you believe you are seeing is a RESULT of leveraging off of the foot.
I don't believe in anything. This is the accepted concept by swimming experts, and it agrees with principles of biological propulsion. I am just trying for you guys to learn something from this. And there's no leveraging off the foot, the kinetic chain theory does not apply to swimming.
In Reply To:
But really, his point was to debunk the notion that one should keep their feet below the surface when swimming. Do you subscribe to that notion?
Does that notion needs debunking? I've heard many coaches emphasize having the ankles breaking the surface, and most good kickers break the surface, so I don't think debunking is needed here.
In Reply To:
Furthermore, I have to disagree with your belief that body position dictates the level of foot elevation.
You can disagree all you want, but this is simple geometry. If your hips are riding 10-20cm below the surface, you'll have a hard time having your ankles breaking the surface. Where your feet end up depends on where your head/chest is.
In Reply To:
In fact, it is the connection in timing between the kick and the body rotation that dictates how well your position really is. This synchronization between the hips, the arms, and the legs REQUIRES active motion from the leg muscles. I think that it might be proper to say that the hips "initiate" or "cue" this motion, which doesn't make them an innocent bystander either, and also creates the impression that the hips are driving the kick.
You are confusing hip motion with body rotation. I would take this opportunity to remind you that elite freestylers rotate their hips along their longitudinal axis far less than most "swimming" coaches recommend.
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Let's go even further into this idea that the kick drives the propulsion. If a person is doing a 2-beat kick, you could at least hypothesize that each time the hip moves the legs are driven by this motion (but I think you would be wrong). However, I would submit that it is fundamentally impossible for this to occur if a person is doing more than a 2 beat kick. In the case of a 4 or 6 beat kick, there are 2 and 3 times as many kick beats than there are hip oscillations.
Not sure who are you talking about here, I never mentioned anything about the kick driving propulsion. Again, kinetic chain theory does not apply.
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Are there little hidden motors which would be flicking the legs up and down in opposition to the rotation of the hips?
Again, you're confusing hip rotation with hip motion.
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Dave might not be an elite swimmer, yet, but he most certainly has been an elite kicker for quite some time (able to hold his own nicely in kick sets with US Olympic Trials qualifiers). Would you submit that his leg muscles were just along for the ride there?
"Elite kicker"?! Please keep this discussion serious.
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