Chest straps are commonly used for heart rate monitors and the CORE sensor. However, some women find these chest straps uncomfortable or even painful. There are some alternatives to use of CORE without a chest strap:
Attach the CORE sensor to the bra band or sports bra on the side or the back of the body. The black plastic clip that helps secure the sensor may or may not be needed, depending on the width and the material of the bra band or sports bra..
Use the adhesive patches to stick the CORE sensor to the torso. Replacement patches can be purchased from our store. The patches with the blue liner are suited for everyday use while the patches with the white liner are suitable for sports use.
Keep in mind, for sports usage, CORE needs data from a heart rate monitor for its algorithm to deliver the most accurate core body temperature.
It is also possible to wear the CORE sensor on your arm using an arm strap. Please note that accuracy can be lower than when CORE is positioned on the torso.
The CORE sensor can also be worn outside of sports activity without a heart rate monitor to continually track basal body temperature. Basal temperature can help predict fertility and provide an early indicator of pregnancy.