Seating that provides comfort, facilitates healthful upright posture, has capability for exercise, and facilitates a healthful upright position, comprises a seat having left and right portions for supporting a user's left and right thighs, respectively. A seat support supports the seat. The seat support includes a pivot axis about which the seat left and right portions can pivot downwardly and upwardly relative to the seat support. A foot plate assembly comprises right and left foot support members positioned forwardly and below the seat to allow a user to exercise while seated. A connection structure links the foot plates to the seat so that the seat sections and the foot members have corresponding movement.

 
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> Bicycle pump valve

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