They take turns doing the same challenges. While one of them is working out, the other is resting and recording her heart beat with the steth and spo2. One of the challenges is holding breath the longest while working out.
Description
They take turns doing the same challenges. While one of them is working out, the other is resting and recording her heart beat with the steth and spo2. One of the challenges is holding breath the longest while working out.