Meaning of the phrase 「体幹の見切りと筋肉の凝固弛緩その隙間」


I've been reading 魔法使いの夜 and stuck with this sentence -「体幹の見切りと筋肉の凝固弛緩その隙間。」.
I completely cannot grasp the meaning from it, so I'll try to break it into
parts and translate them.

「体幹の見切り」 - the weak(見切り) part of torso

「筋肉の凝固弛緩」 - solidification and relaxation of the muscles

「その隙間」 - their weak point(opening)

Can you please tell me where I'm mistaken, and help me with translating it.
Thank you!

>
> 彼の思考には初めから、その点しか存在しない。ーー狙うは一点。意識の同一、呼吸の合致。体幹の見切りと筋肉の凝固弛緩その隙間。その地点こそ、唯一とも言える、生命の壁の亀裂である。人狼の胸に叩きつけられる、あまりにも弱い人の力。

Full scene: <http://www.youtube.com/watch?v=fU-27H4XNAc> (This part starts at
1:23)




To repeat what I stated in the comment, 「体幹の見切りと筋肉の凝固弛緩その隙間」 is NOT a sentence
by any standard. It is only a noun phrase in which everything else will
eventually end up modifying the last noun 隙間. I repeated it because so many
members here call little phrases "sentences".

隙間 is a key word here. If one thinks of a "spatial gap" just because a
dictionary says so, one will be left in the dark with the whole phrase. The
word is being used to refer to a "temporal gap" here. I shall return to this
point.

体幹の見切り might be a difficult phrase to comprehend because 見切り is being used as
a technical martial art term here rather than for a usual dictionary meaning.
It means pulling back one's upper body to parry an attack.

筋肉の凝固弛緩 means what OP stated without a twist.

Now, in order to pull back one's upper body, 筋肉の凝固 naturally must occur,
followed immediately by 筋肉の弛緩. That split second between the two sets of
muscle activities is what the author refers to as その隙間. He is saying that that
is the ultimate moment for an effective attack because that is the only moment
that the opponent is defenseless.

If it helps the Japanese-learner, try inserting a 「それに伴う」 between
「体幹の見切りと」and「筋肉の凝固弛緩」with それ referring to 体幹の見切り. It MIGHT become a little
easier to understand the phrase.




To repeat what I stated in the comment, 「体幹の見切りと筋肉の凝固弛緩その隙間」 is NOT a sentence
by any standard. It is only a noun phrase in which everything else will
eventually end up modifying the last noun 隙間. I repeated it because so many
members here call little phrases "sentences".

隙間 is a key word here. If one thinks of a "spatial gap" just because a
dictionary says so, one will be left in the dark with the whole phrase. The
word is being used to refer to a "temporal gap" here. I shall return to this
point.

体幹の見切り might be a difficult phrase to comprehend because 見切り is being used as
a technical martial art term here rather than for a usual dictionary meaning.
It means pulling back one's upper body to parry an attack.

筋肉の凝固弛緩 means what OP stated without a twist.

Now, in order to pull back one's upper body, 筋肉の凝固 naturally must occur,
followed immediately by 筋肉の弛緩. That split second between the two sets of
muscle activities is what the author refers to as その隙間. He is saying that that
is the ultimate moment for an effective attack because that is the only moment
that the opponent is defenseless.

If it helps the Japanese-learner, try inserting a 「それに伴う」 between
「体幹の見切りと」and「筋肉の凝固弛緩」with それ referring to 体幹の見切り. It MIGHT become a little
easier to understand the phrase.

