Intermittent HR dips: cause for concern?
In keeping with the recent questions about heart rate, here's something I've noticed.
I've been riding my stationary rig regularly lately, and I've noticed that over the course of an hour, I'll have about three episodes where my HR dips about 10 bpm and then bounces back. The episodes last about 10 seconds. These show up as sharp downward spikes on the graph. These are during "off" intervals, occasionally during easy "on" intervals—in other words, when I'm not under a lot of load. This is with a chest-band HRM that I believe is maintaining good contact—I don't think it's an equipment problem.
Is this a cause for concern? Anyone else see this?