How do we assess the cardiorespiratory system function? What are the technology used and how do we interpret it? How do assess for deconditioning and recognize fitness?

You can try a multichannel monitor (blood pressure, ECG, Pulse Oximetry) that is routinely used for patients undergoing surgery, then peddle a bike to look at the various parameters of your cardiorespiratory function as you progress from a resting state to full active exercising to observe your level of fitness!