Effort Belt Adjustments
To fasten and unfasten the belt, use the clip buckles located at each end of the sensor. Adjust the length of the belt to fit by pulling on the ends of the strap. Depending on your size, you may need to adjust the strap at one or both ends. Aim for a snug, but comfortable fit.
Once adjusted for size, place the belt around your upper chest and fasten the two ends in front.