Body state determination device, body support device, and body state determination method

A body state determination device comprising:

• a first mat comprised of a plurality of fluid cells, wherein the first mat has at least a head side, a foot side, a right side, and a left side;
• a sensor that is configured to detect a plurality of pressure distributions formed by a body weight of a user;
• a second mat comprised of one or more crescent-shaped fluid cells and a third mat comprised of one or more crescent-shaped fluid cells, wherein the second mat and the third mat are disposed between the first mat and the sensor, the second mat being disposed proximate the head side and the third mat being disposed proximate the foot side, wherein the second mat extends in a rightward-leftward direction of the first mat and is arranged so that a recess of the second mat faces the foot side of the first mat, and wherein the third mat extends in the head-foot direction along the first mat and is arranged so that a recess in the third mat faces inwardly from the left side of the first mat toward the right side of the first mat or faces inwardly from the right side of the first mat toward the left side of the first mat;
• and a controller configured to determine a state of a body of the user by comparing the plurality of pressure distributions detected by the sensor with each other, the state of the body of the user including a first state wherein the user has a lower limb contracture and a second state wherein the user has a kyphosis, wherein the controller is configured to inflate the second mat if the controller determines the user is in the first state, and the controller configured to inflate the third mat if the controller determines the user is in the second state.