Abstract: A keyboard 11 with the function of examining user's physical condition to make a computer 12 to be able of generating a message for reminding the user of his (her) physical condition. The keyboard comprises a plurality of keys 111, a sensing unit 112, wherein the sensing unit 112 senses keystrokes of the keys 111 and produces corresponding physical parameters, whereby the computer 12 generates the message according to the physical parameters. The keyboard 11 will make the computer 12 to be able of alarming the users when their keystroke count, rate, or force exceed a corresponding predetermined threshold.