Table 1.

English Version of the Frail’BESTest: Instructions and Evaluation

System	Test	Consign	Evaluation
A Anticipations	Rise to toes	“Give me your hands, rise on your toes and come back down, 3 times”	1: optimal postural preparation (anterior pelvic shift)
	Alternated foot reaching on a step	“Put your foot on the stair and go back on the floor, and with the other foot, repeat 2 times”	1: optimal postural preparation (lateral pelvic shift)
	Half-Turn preparation	“Please go straight on and turn around in front of this wall”	1: optimal postural preparation (the last foot support is oriented on the turn direction)
	Sit-to-stand	“Please Stand-up”	1: optimal trunk tilt (around 45–60° with vertical line)
	Back-to-sit	“Please sit-down”	1: optimal trunk tilt (around 45–60° with vertical line)
B Reactions	Postural adaptation	“I look for your reaction”	1: Optimal muscular contraction with the anterior muscular plan to counteract the anteroposterior light push
	Fall avoidance reaction	“I look for your reaction”	1: Optimal back step to counteract the anteroposterior heavy push
C Locomotion	Gait speed in dual task	“Please walk on this corridor, I am just behind you”	1: No notable gait-speed decrease, or instability
	Gait speed modulation	“Please try to walk faster, and now slower”	1: Ability to walk faster and slower
	Half-turn quality	This test can be assessed during the part A	1: No more than 4 steps are necessary to finish the half-turn
	Cervical rotation when walking	“Please walk on this corridor, I am on your side … ok now please turn the head to watch me, and now turn on the other side”	1: The patient turn the head with 45° of cervical rotation without slowdown or instability
	Go down to the floor	“Please sit down on the floor, you can use this chair to help yourself”	1: The patient sit down without human help (physical or verbal), securely
	Rise from the floor	“Please standup from the floor, you can use this chair to help yourself”	1: The patient stand up without human help (physical or verbal), securely
D Sensory orientation	Feet together/eyes open	“Please stay in this stand up position for a few seconds”	1: The patient is able to stay during 15 seconds in the position without important instability
	Feet shoulder width apart/eyes closed	Please stay in this stand up position for a few seconds”	1: The patient is able to stay during 15 seconds in the position without important instability
	Feet shoulder width apart on a foam surface/eyes open	Please stay in this stand up position for a few seconds”	1: The patient is able to stay during 15 seconds in the position without important instability
E Biomechanical constraints	Effort adaptation	No specific consign	1: The patient is not short of breath when he sit down after the gait speed test
	Lower limbs muscle power	Consign of the chair test: “please stand up and sit down successively, I will say when you will stop, you can use the armchairs if you need”	1: The patient is able to stand up and sit down three times in 15 seconds
	Ankle range of motion	No specific consign, patient is sit down, with 90° hip and knee flexion	1: passive and active range of motion of more than 10° in dorsal ankle flexion
	Foot quality state	No specific consign, no shoes	1: no problem on the feet, neither cutaneous nor osteoarticular deformities
	Directional instability	No specific consign, the patient is observed during the others tests	1: no preferential instability in one direction, for example backward, or laterally.
	Anterior stability limit (Functional Reach Test)	Consigns of the FRT (Duncan at al 1990): “Please reach forward as far as you can with your index finger without moving on your feet”	1: The patient is able to reach minimum 26 cm
F Gait Symmetry	Gait symmetry	No specific consigns, gait analysis during the gait speed test	1: Equal longer of each step
	Weight bearing pain	“Do you have pain when you charge one foot?”	1: No pain neither for the right nor for the left foot charge
	Strength deficit	No specific consign	1: The therapist evaluation find no strength deficit linked with the gait asymmetry
	Range of motion deficit	No specific consign	1: The therapist evaluation find no range of motion deficit linked with the gait asymmetry