The present invention relates to a protection device comprising a body having a device for cooling / heating (1) and a connecting device. The device for cooling / heating (1) comprises a pocket (11), a device for the flow (12) and a chip (13), the device of the flow (12) being connected to the pocket (11) and to the chip (13). The liquid is received in the pocket (11) and circulates inside the device of the flow (12), and the chip (13) to change the temperature of the liquid in the circulation device (12). The connecting device is attached to the user's body and the temperature of the liquid is adjusted to ensure the function of cooling or heating of the muscle of the body of the user.
