哪些球员在开球时必须lock the body，动一下就犯规

bourne

哪些球员在开球时必须lock the body，动一下就犯规 也就是false start

heraclues

进攻方允许有一名球员平行或者向后移动。如果有两名以上球员同时移动则必须静止一秒以上才可以开球。
任何佯装开球的动作都是false start。锋线上那些把手放在地上的球员需要lock the body.但是转动肩膀和头部东张西望的动作是允许的。

heraclues

NFL Rule 7, Section 4, Article 2
False Start.  It is a False Start if the ball has been placed ready for play, and, prior to the snap, an offensive player who has assumed a set position charges or moves in such a way as to simulate the start of a play, or if an offensive player who is in motion makes a sudden movement toward the line of scrimmage. Any quick abrupt movement by a single offensive player, or by several offensive players in unison, which simulates the start of the snap, is a false start.
Exceptions:
(a)  This does not apply to an offensive player under the center who turns his head or shoulders, unless the movement is an obvious attempt to draw an opponent offside.

KING_OF_SOUTH

开球线上球员允许变换姿势一次，且是由两点式变为三点式，反之不能

vinff

学习了。{:soso_e179:}

unquenchable

学习了。

Queen

原来如此，长知识了

zallen

学习了！！！

S.R.911

防守方貌似没有限制吧？