A sole structure for an article of footwear , the sole structure comprising: a bladder defining a fluid-filled peripheral chamber and a fluid-filled heel chamber ; wherein the peripheral chamber is configured as an elongated tube, the peripheral chamber having a heel portion establishing a rear periphery of the bladder , a lateral arm portion extending from the heel portion and establishing a lateral periphery of the bladder , and a medial arm portion extending from the heel portion and establishing a medial periphery of the bladder ; wherein the bladder includes webbing connecting the heel chamber to the peripheral chamber , with the heel chamber disposed between the medial arm portion and the lateral arm portion and forward of the peripheral chamber in a heel region of the bladder ; wherein the peripheral chamber and the heel chamber are sealed and are fluidly isolated from one another; wherein the bladder defines at least two additional fluid-filled chambers fluidly isolated from the peripheral chamber , the at least two additional fluid-filled chambers including a rear midfoot chamber and a front midfoot chamber , the rear midfoot chamber disposed between and connected to the heel chamber and the front midfoot chamber by the webbing , and the rear midfoot chamber and the front midfoot chamber connected to the lateral arm portion and the medial arm portion by the webbing ; and wherein the bladder includes a groove (G1, G2) in the webbing , the groove (G1, G2) extending between the medial arm portion and the front midfoot chamber , between the medial arm portion and the rear midfoot chamber , between a rear of the rear midfoot chamber and the heel chamber , between the rear midfoot chamber and the lateral arm portion , and between the front midfoot chamber and the lateral arm portion . a bladder defining a fluid-filled peripheral chamber and a fluid-filled heel chamber ; wherein the peripheral chamber is configured as an elongated tube, the peripheral chamber having a heel portion establishing a rear periphery of the bladder , a lateral arm portion extending from the heel portion and establishing a lateral periphery of the bladder , and a medial arm portion extending from the heel portion and establishing a medial periphery of the bladder ; wherein the bladder includes webbing connecting the heel chamber to the peripheral chamber , with the heel chamber disposed between the medial arm portion and the lateral arm portion and forward of the peripheral chamber in a heel region of the bladder ; wherein the peripheral chamber and the heel chamber are sealed and are fluidly isolated from one another; wherein the bladder defines at least two additional fluid-filled chambers fluidly isolated from the peripheral chamber , the at least two additional fluid-filled chambers including a rear midfoot chamber and a front midfoot chamber , the rear midfoot chamber disposed between and connected to the heel chamber and the front midfoot chamber by the webbing , and the rear midfoot chamber and the front midfoot chamber connected to the lateral arm portion and the medial arm portion by the webbing ; and wherein the bladder includes a groove (G1, G2) in the webbing , the groove (G1, G2) extending between the medial arm portion and the front midfoot chamber , between the medial arm portion and the rear midfoot chamber , between a rear of the rear midfoot chamber and the heel chamber , between the rear midfoot chamber and the lateral arm portion , and between the front midfoot chamber and the lateral arm portion . <EOS>