Alias · Back Position
Leg trap back
Also known as Straitjacket — the canonical term used on this site.
Descriptive — back control with leg-trapping configuration
Leg trap back is a descriptive label for the straitjacket back-control configuration — emphasising the leg-as-trap mechanic that captures the opponent’s arms and denies them defensive framing.
Etymology. “Leg trap” specifies the trapping mechanism: the attacker’s legs (not arms) close around the opponent’s arms to immobilise them. “Back” attaches the positional context. The compound phrase appears in coaching vocabulary that emphasises the leg-arm-trapping geometry over the broader “straitjacket” metaphor.
Mechanics. The leg-arm-trap removes the opponent’s primary defensive limbs from the escape kinematics — without arm framing, the opponent cannot break the attacker’s chest-to-back compression or contest the strangle threats that follow.
Cross-reference. “Straitjacket” is the canonical site label; “arm trap back control” is the broader descriptive name. Full mechanical coverage on Straitjacket.