C******u
发帖数: 900 | 1 最近在反复看高手视频，发现孙杨除了最后100米冲刺用6次打腿外，正常巡航时用的是
4次打腿。再仔细一看，他并不是对称的2+2次，而是3+1。非呼吸一侧手臂划水时打3次
，呼吸时同侧腿只打1次。我猜这应该是高级战术了，是根据他自身特点和呼吸时的身
体不对称性制定的方案吧。 | i*********5
发帖数: 19210 | 2 是的，叫做＂signature kick＂
孙杨: In general, 孙杨 exhibits the "half-catchup" style of stroke that has
become more common in the last decade or so. This half-catchup style is also
referred to as 'front quadrant" swimming. As for his kick, Yang
demonstrates a variety of kick frequencies, alternating between a 2,4 and 6-
beat kick during recent races, although he seems to settle into a 4-beat as
the dominant rhythm through much off the middle of his races. Yang also
demonstrates a pronounced "signature kick" during his stroke cycle, whereby
a single kick in a cluster of kicks during a single arm pull is considerably
larger than the others. He will occasionally do a "double-breath" that is,
breathing on two consecutive arm pulls, although he primarily demonstrates
right-side breathing.
One of the more profound aspect of his swimming stroke is the extremely high
position of his elbow at the end of his catch (aka "Early Vertical Forearm"
). Another striking and beautiful aspects of his swimming is that Sun, like
distance great Keiren Perkins, employs a wide mixture of kick rhythms. In
one swim, you can witness Yang doing a 2, 4 and 6 beat kick. One of the more
subtle aspects of his form is the occurence, timing, and striucture of his
"signature kicks", that is, kicks within a cycle that stand out as being
larger (in amplitude) and presumably more powerful than the other kicks in
his cycle. (By Robertwb)
Early Vertical Forearm
A striking aspect of Yang's technique is his pronounced Early Vertical
Forearm, or EVF (also demonstrated by many of the other athletes in this
race). The EVF concept sees the upper arm remaining in a forward reaching
position, while the forearm rotates about the elbow to a perpendicular with
the suface of the water, hence achieving a "vertical" positioning. In an
attempt to quantify this, lines have been drawn (Figure 2) to indicate the
approximate horizontal place (the surface of the water) and the angle of the
upper and lower arm. Based on these estimates, at this stage in tthe stroke
, it appears that Yang has a bend of only 7° with an angle between the
forarm and water surface of approximately 94°. For all intents and purposes
, I think that it would be reasonable to suggest that Yang has achieved an
absolutely textbook EVF -- or perhaps, and absolutely literal interpretation
of the ideal.
Early in the race, he kick is a bit more vigorous, with a 6-beat rhythm
occuring frequently. If you look closely for the first few cycle of this
video, you can count 3 kicks coinciding with the pull of each arm. Even
though he is using a 6 beat kick, each of these 6 beats is not equal. When
using a 6-beat, both the right and the left leg can be seen to show a
distinct "signature" beat, or more powerful kick corresponding with what,
for Yang, is the optimal timing (or at least good enough!). The interesting
part here, is that these signature kicks occur very early in the pull phase,
seemingly coinciding with the moment of his forearm reaching the absolute
vertical, it is almost as if he is "kicking his way into the catch".
When swimmers use a 2-beat kick, since there is only 1 kick per arm stroke,
both kicks are the de-facto "signature" kicks. Many 4/6 beat kickers don't
necesarily exhibit a signature kick, their kicks are essentially uniform,
but some do, especially 4-beat kickers (who often have 1 "signature" beat
per 2 arm strokes). Yangs pronounced signature kicks resemble a 2-beat kick,
but with some additional small kicks added in. The timing difference
between Yang's signature beat and that of a more typical 2-beat kicker is
quite obvious. The swimmer in video 5 (at the bottom of the screen),
demonstrates a 2-beat kick with the signature kicks timed with the finish of
each arm pull.
Finding His Own Freestyle
Yang demonstrates many characteristics of top freestylers, the most striking
of which is his quintessential high elbow position. He kicks vigorously
enough to be in the segment of the elite population that is classified as "
front quadrant" - he has such a pronounced half-catchup as to make Terry
Laughlin proud indeed. But he has other subtleties that are notable as well.
His use of a signature kick is clear, and a bit different than many 4/6
beat kickers, and the timing of his signature kick is far different than
that of the overwhelming majority of 2-beat kickers. Are the oddities of his
stroke an innovation or a liability? Hard to say, but one thing is for
certain: he knows how to settle into a groove, a dynamic groove that is
composed of rhythms within rhythms, but with a consistent back-beat that is
his signature kick.
【在 C******u 的大作中提到】
: 最近在反复看高手视频，发现孙杨除了最后100米冲刺用6次打腿外，正常巡航时用的是
: 4次打腿。再仔细一看，他并不是对称的2+2次，而是3+1。非呼吸一侧手臂划水时打3次
: ，呼吸时同侧腿只打1次。我猜这应该是高级战术了，是根据他自身特点和呼吸时的身
: 体不对称性制定的方案吧。
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