Person support apparatuses with selectively coupled foot sections

A person support apparatus comprising:

• a base frame;
• a primary support frame supported on the base frame;
• a foot section coupled to the primary support frame;
• a carriage that is freely translatable between a head end of the primary support frame and a foot end of the primary support frame, the carriage comprising a torso portion and a seat portion comprising a thigh segment and a gluteal segment;
• a selectable trunnion that selectively and severally couples the foot section to the primary support frame and the thigh segment of the seat portion;
• and
• a support surface supported on the carriage such that the support surface translates with the carriage, the support surface comprising at least one support section which is collapsible in a length direction of the support surface, wherein the at least one support section collapses as the carriage translates towards the foot end of the primary support frame;
• wherein the at least one support section comprises an air bladder and a control valve fluidly coupled to the air bladder, the control valve comprising a normally closed position and a vent position;
• and
• wherein the person support apparatus comprises an exercise configuration wherein the control valve is in the vent position and the air bladder is vented to atmosphere such that air is expelled from the air bladder when the carriage translates toward the foot end of the primary support frame regulating a rate of travel of the carriage with respect to the primary support frame.