A chair comprising: a supporting frame (11, 17, 21); a seat portion for supporting an occupant; and a back portion for supporting the back of a seated occupant, the back portion being reclinable relative to the supporting frame (11, 17, 21) between a generally upright position and a generally reclined position; and a recline resistance mechanism that is selectively engageable to resist movement of the back portion toward the generally reclined position, the recline resistance mechanism comprising: a recess in a first chair component; a shuttle that is slidably engaged with the recess in said first chair component, at least part of the shuttle being resilient and configured such that as the shuttle slides through at least part of the recess, said at least part of the shuttle is compressed, with friction between the shuttle and the recess resisting movement of the shuttle in the recess; and an engaging member operatively connected to a second chair component, the engaging member being actuable to selectively operatively engage the shuttle or to selectively release the shuttle, wherein, when the engaging member is selectively operatively engaged with the shuttle, movement between the shuttle and the second chair component is resisted, so that upon movement of the back portion toward the generally reclined position,, the shuttle is caused to slide in the recess, with friction between the shuttle and the recess applying a resistance against movement of the back portion toward the generally reclined position; and wherein the first chair component comprises one of the supporting frame (11, 17, 21), the seat portion or the back portion, and wherein the second chair component comprises another one of the supporting frame (11, 17, 21), the seat portion or the back portion, and wherein the first chair component and the second chair component are configured to move relative to each other upon recline of the back portion. a supporting frame (11, 17, 21); a seat portion for supporting an occupant; and a back portion for supporting the back of a seated occupant, the back portion being reclinable relative to the supporting frame (11, 17, 21) between a generally upright position and a generally reclined position; and a recline resistance mechanism that is selectively engageable to resist movement of the back portion toward the generally reclined position, the recline resistance mechanism comprising: a recess in a first chair component; a shuttle that is slidably engaged with the recess in said first chair component, at least part of the shuttle being resilient and configured such that as the shuttle slides through at least part of the recess, said at least part of the shuttle is compressed, with friction between the shuttle and the recess resisting movement of the shuttle in the recess; and an engaging member operatively connected to a second chair component, the engaging member being actuable to selectively operatively engage the shuttle or to selectively release the shuttle, wherein, when the engaging member is selectively operatively engaged with the shuttle, movement between the shuttle and the second chair component is resisted, so that upon movement of the back portion toward the generally reclined position,, the shuttle is caused to slide in the recess, with friction between the shuttle and the recess applying a resistance against movement of the back portion toward the generally reclined position; and wherein the first chair component comprises one of the supporting frame (11, 17, 21), the seat portion or the back portion, and wherein the second chair component comprises another one of the supporting frame (11, 17, 21), the seat portion or the back portion, and wherein the first chair component and the second chair component are configured to move relative to each other upon recline of the back portion. a recess in a first chair component; a shuttle that is slidably engaged with the recess in said first chair component, at least part of the shuttle being resilient and configured such that as the shuttle slides through at least part of the recess, said at least part of the shuttle is compressed, with friction between the shuttle and the recess resisting movement of the shuttle in the recess; and an engaging member operatively connected to a second chair component, the engaging member being actuable to selectively operatively engage the shuttle or to selectively release the shuttle, wherein, when the engaging member is selectively operatively engaged with the shuttle, movement between the shuttle and the second chair component is resisted, so that upon movement of the back portion toward the generally reclined position,, the shuttle is caused to slide in the recess, with friction between the shuttle and the recess applying a resistance against movement of the back portion toward the generally reclined position; and wherein the first chair component comprises one of the supporting frame (11, 17, 21), the seat portion or the back portion, and wherein the second chair component comprises another one of the supporting frame (11, 17, 21), the seat portion or the back portion, and wherein the first chair component and the second chair component are configured to move relative to each other upon recline of the back portion.