I am looking for a fitness tracker that includes most of the functions in the Move ECG except I do not see HRV. From what I understand that HRV measures the variation between heart beats and is a good indicator of the autonomic nervous system, which includes both your sympathetic nervous system (SNS, or fight-or-flight response) and parasympathetic nervous system (PNS, or your chill-out system). Meaning it is a good indicator of fatigue. For example you might have hard workout and not feel fatigue but if your HRV is low then you body has not fully recovered from that workout and you might want to consider backing off on your next workout to avoid burnout. But if your HRV is high then that is a good indicator that your body is ready for your next hard workout. By having the ECG function in this watch there should be no reason why HRV could not be programmed into the Software. Granted HRV is a huge data dump of information but upon waking up in the morning one could sample HRV to have a good indication of how to proceed during your next workout protocol. Plus allowing one to sample HRV periodically throughout the day would be beneficial both pre and post work out. Is Withings planning on incorporating at some point a HRV function into one of its watches?