A foot support system for an article of footwear, comprising: a compressor including a gas intake port and a gas outlet port; a first solenoid valve (220, 420) including a gas intake port, a first gas outlet port, and a second gas outlet port; a first fluid line connecting the gas outlet port of the compressor with the gas intake port of the first solenoid valve (220, 420); a second solenoid valve including a gas intake port and a gas outlet port; a second fluid line connecting the first gas outlet port of the first solenoid valve (220, 420) with the gas intake port of the second solenoid valve; a third solenoid valve including a gas intake port and a gas outlet port; a third fluid line connecting the second gas outlet port of the first solenoid valve (220, 420) with the gas intake port of the third solenoid valve; a first fluid-filled bladder configured to support at least a first portion of a plantar surface of a user's foot, wherein the first fluid-filled bladder includes a gas port; a fourth fluid line connecting the gas outlet port of the second solenoid valve with the gas port of the first fluid-filled bladder; a second fluid-filled bladder configured to support at least a second portion of a plantar surface of a user's foot, wherein the second fluid-filled bladder includes a gas port; a fifth fluid line connecting the gas outlet port of the third solenoid valve with the gas port of the second fluid-filled bladder, wherein the second solenoid valve and/or the third solenoid valve are configured to be changeable between (a) an inflation configuration in which gas is supplied to the first fluid-filled bladder and/or the second fluid-filled bladder, respectively, (b) a pressure maintain configuration in which gas pressure in the first fluid-filled bladder and/or the second fluid-filled bladder, respectively, is maintained substantially constant, and (c) a deflation configuration in which gas is released from the first fluid-filled bladder and/or the second fluid-filled bladder, respectively. a compressor including a gas intake port and a gas outlet port; a first solenoid valve (220, 420) including a gas intake port, a first gas outlet port, and a second gas outlet port; a first fluid line connecting the gas outlet port of the compressor with the gas intake port of the first solenoid valve (220, 420); a second solenoid valve including a gas intake port and a gas outlet port; a second fluid line connecting the first gas outlet port of the first solenoid valve (220, 420) with the gas intake port of the second solenoid valve; a third solenoid valve including a gas intake port and a gas outlet port; a third fluid line connecting the second gas outlet port of the first solenoid valve (220, 420) with the gas intake port of the third solenoid valve; a first fluid-filled bladder configured to support at least a first portion of a plantar surface of a user's foot, wherein the first fluid-filled bladder includes a gas port; a fourth fluid line connecting the gas outlet port of the second solenoid valve with the gas port of the first fluid-filled bladder; a second fluid-filled bladder configured to support at least a second portion of a plantar surface of a user's foot, wherein the second fluid-filled bladder includes a gas port; a fifth fluid line connecting the gas outlet port of the third solenoid valve with the gas port of the second fluid-filled bladder, wherein the second solenoid valve and/or the third solenoid valve are configured to be changeable between (a) an inflation configuration in which gas is supplied to the first fluid-filled bladder and/or the second fluid-filled bladder, respectively, (b) a pressure maintain configuration in which gas pressure in the first fluid-filled bladder and/or the second fluid-filled bladder, respectively, is maintained substantially constant, and (c) a deflation configuration in which gas is released from the first fluid-filled bladder and/or the second fluid-filled bladder, respectively.