How is back height measurement taken when fitting equipment?

• A. From floor to shoulder
• B. From seat of chair to base of axilla minus 4 inches
• C. From base of neck to waist
• D. From seat to top of head

Answer: (B)

Back height measurement for equipment fitting is taken from the seat surface up to the base of the axilla, then about four inches are subtracted. ThisPlaces the backrest to support the trunk without pressing into the armpit, allowing the scapula to move freely and the wearer to use their arms comfortably. Subtracting roughly four inches helps ensure the backrest ends below the inferior angle of the scapula, giving stable support while avoiding pressure on the armpits and accommodating shoulder movement. Other measurements don’t target where the backrest should contact the torso in a seated position.