Alias · Back Position
Harness defence
Also known as Seatbelt Defence — the canonical term used on this site.
Training background: same grip, different name
Descriptive — defence against the harness grip
Harness defence is the descriptive name for the defensive response to a harness (seatbelt) grip from back position — the bottom player’s sequence to prevent the attacker from completing the back-control hold.
Etymology. “Harness” references the over-under arm configuration that secures the attacker to the opponent’s back; “defence” attaches the bottom-player tactical category. The label is used interchangeably with “seatbelt defence” — both reference the same defensive intent and the same grip-configuration target.
Mechanics. The defence intercepts the grip before the harness closes — the attacker requires both hands to meet on the chest to lock the harness; the bottom player’s defensive priority is preventing that connection rather than fighting the grip after closure.
Cross-reference. “Seatbelt defence” is the alternate name. Full mechanical coverage on Seatbelt Defence.