You can use KT Tape to help hold the sensors to your body when in movement. You can buy it here on Amazon: https://amzn.to/3xQXd2f. Hold your sensor with the tree logo facing upright. Cut a 2 inch square of KT tape, and apply it to the logo side of the sensor. Using your app to guide you, place the sensor on the correct place on your body, making sure the KT tape has strong contact with your skin around the entire sensor.