Table 1.

Observational instrument of SOBJUDO-OSGU

CRITERION	CODE	DESCRIPTION
GRIP	FAGR	While performing the technique, tori (the person executing the action) grips the judogi of uke (the person who is thrown) with his/her left hand, around the midpoint of the forearm.
OFF-BALANCE	NOB	Tori does not put uke off-balance in the first part of the technique. His arms maintain the initial grip and only serve to accompany the action.
	DOB	The frontal off-balancing action and the subsequent initial displacement are performed in a discontinuous way.
POSITION OF SUPPORTING FOOT	IPSF	After the initial movement tori places his/her left foot incorrectly. The supporting foot is either too far forward or too far back. The correct position is parallel to and aligned with uke’s right foot.
INCORRECT BLOCK PLACEMENT	IBP	When tori places his right leg behind uke’s left leg, tori makes an inappropriate placement of his leg in one of the following ways: 1) it lies behind uke’s left leg (about 15 cm) without contact between the two legs; 2) he only contacts with his right ankle on uke’s left ankle; or 3) the contact that occurs between tori and uke is only in the twin.
	KN	The right knee joint of tori is flexed during blocking action.
BLOCKING ACTION	NBLC	Tori, during the execution of the technical action, does not block at any time the uke’s body on his leg.
	REAP	Tori, instead of blocking the body of uke, performs a sweeping action with his right leg.
FINAL BLOCKING PHASE	WLB	Part of the body weight of tori during the blocking action is leant on his right leg.
	BANS	The execution of the block of the leg and the arm action over uke is performed with continuity.
	SF	Tori entirely supports the sole on the ground with the foot used to carry out the blocking action, keeping also part of the body weight on it.
THROW STAGE	IAT	During the final stage of the throw, tori’s arms produce an insufficient force when throwing uke’s body to the floor.
	ITTU	Tori fails to turn his trunk enough in the guiding stage of the technique.
CONTROL STAGE	FACC	During the guiding stage tori uses his/her right arm to accompany uke’s fall to the floor.
	FNC	During the final stage of the technique tori performs no action with his/her left hand and therefore fails to control the fall of the adversary’s body.
	KTB	During the final stage of the throw tori bends his/her trunk around 90º with respect to the vertical plane, maintaining this position once the throw is complete.
REBALANCING	RRF	After performing the throw tori loses his/her balance. In order to regain it he/she steadies himself with his/her right foot.
	RLF	Upon completion of the technique tori loses his/her balance, which he/she regains by steadying him-/herself with his/her left foot.
	RRH	After throwing the adversary tori loses his/her balance in a forward direction (sagittal plane) and uses his/her right hand to correct his/her position.
	RBL	After the blocking action tori uses the leg that performed the reap to regain balance.
GLOBALITY	SLEX	The throw is executed slowly and without any continuity.