When I started looking at Heart Rate Variability (HRV) as a tool to train myself I was drawing on my experience using heart rate monitors for physical training. When I went for a run I would see my heart rate in real time and adjust my exertion accordingly. I found this a powerful way to both increase my fitness and extend my training by not overdoing it.
Most of the apps today either lack context on the data they gather or give you a passive report on a past period of time. For example, the Jawbone UP tells you your steps but it is up to you to index that against other measures to see if you are improving your fitness. Multiple HRV apps will give you a coherence or stress reading after a session is complete. Two apps I am using now structure the feedback in ways that make the experience more interactive and provide good enough context for a user to take action in real time.
Stayfit by Marco Altini. I have just started using this app and really like it. It does not use HRV, but it creates very nice context by indexing resting heart rate against daily exertion. A quick measure of resting heart rate in the morning is very easy to do, then watching your exertion the rest of the day helps you work on fitness. The interface is very clean:
I find that I look at it often during the day to watch my kilocalories expended and make adjustments to my schedule and activities to increase exertion for the day. It is only available on iOS is its only drawback.
Breathe Sync by Michael Townsend Williams. I have written about this app in an earlier post and still have it as one of my go to apps. The reason is that its primary use case is to bring you back to a coherent and relaxed state very simply and quickly. It does give a measurment but that is a secondary part of the experience. The camera on your phone picks up your heart beats and then shows with a simple blue and white ring visual how your heart rate is slowing or speeding up as you see here:
Over the course of the session the ring visual will allow you to match your breath with the increase and decrease of the interval between heart beats. Very powerful and effective. I use it when I feel amped up or just prior to a meeting to get into a balanced place.
The context of indexing one measure against another in Stayfit and the very active intervention quality in Breathe Sync put them both on my daily use list. Ultimately I want to train myself to use awareness and respiration to set myself “in the zone” when it comes time to negotiate, interview and brainstorm in a professional setting. These two apps are great tools as I work on getting there.