Provided are an exercise reminder method and a smart wristband; the smart wristband obtains in real time the physiological feature parameters of a user (S101); if an abnormality in the physiological feature parameters appears, then the user's state of activity is detected (S102), and an exercise reminder is carried out according to the state of activity of the user (S103); the exercise reminder method and smart wristband carry out the exercise reminder according to the actual physiological feature parameters of the user.