A sole structure for an article of footwear, comprising: a first pump including a first inlet and a first outlet in fluid communication with a first internal pump chamber defined by the first pump, wherein the first internal pump chamber includes an open space defined, at least in part, between a first wall and a second wall located opposite the first wall, wherein at least one of the first wall or the second wall is collapsible to decrease volume of the first internal pump chamber and force fluid to exit the first internal pump chamber via the first outlet; a first fluid transfer line connected to the first inlet that moves fluid from an external fluid source into the first internal pump chamber via the first inlet; a valve provided in the first fluid transfer line to prevent fluid from flowing from the first internal pump chamber back to the external fluid source; a first sole component having a first major surface and a second major surface opposite the first major surface, wherein the second major surface includes a first pump containing region, and wherein the first pump containing region defines a first pump engaging surface configured to lie immediately adjacent an exterior side of the first wall of the first internal pump chamber; a second sole component having a third major surface and a fourth major surface opposite the third major surface, wherein the fourth major surface includes a second pump containing region, and wherein the second pump containing region defines a second pump engaging surface configured to lie immediately adjacent an exterior side of the second wall of the first internal pump chamber; a reservoir bladder in fluid communication with the first outlet of the first pump; a foot support bladder; and a fluid transfer control system, wherein the foot support bladder is in fluid communication with the reservoir bladder via the fluid transfer control system, and wherein the fluid transfer control system is adapted to control flow of fluid between the reservoir bladder and the foot support bladder to enable control and change of pressure in the foot support bladder. a first pump including a first inlet and a first outlet in fluid communication with a first internal pump chamber defined by the first pump, wherein the first internal pump chamber includes an open space defined, at least in part, between a first wall and a second wall located opposite the first wall, wherein at least one of the first wall or the second wall is collapsible to decrease volume of the first internal pump chamber and force fluid to exit the first internal pump chamber via the first outlet; a first fluid transfer line connected to the first inlet that moves fluid from an external fluid source into the first internal pump chamber via the first inlet; a valve provided in the first fluid transfer line to prevent fluid from flowing from the first internal pump chamber back to the external fluid source; a first sole component having a first major surface and a second major surface opposite the first major surface, wherein the second major surface includes a first pump containing region, and wherein the first pump containing region defines a first pump engaging surface configured to lie immediately adjacent an exterior side of the first wall of the first internal pump chamber; a second sole component having a third major surface and a fourth major surface opposite the third major surface, wherein the fourth major surface includes a second pump containing region, and wherein the second pump containing region defines a second pump engaging surface configured to lie immediately adjacent an exterior side of the second wall of the first internal pump chamber; a reservoir bladder in fluid communication with the first outlet of the first pump; a foot support bladder; and a fluid transfer control system, wherein the foot support bladder is in fluid communication with the reservoir bladder via the fluid transfer control system, and wherein the fluid transfer control system is adapted to control flow of fluid between the reservoir bladder and the foot support bladder to enable control and change of pressure in the foot support bladder.