5. Irregular Heartbeat
As well as accelerating, the heartrate might also begin to become less steady and more erratic. This is of course a cause for concern although it’s actually a myth to think that the heart rate should be completely steady.
The heart rate actually varies in tempo normally as we breathe in and out. This is a sign of a good parasympathetic tone and actually suggests that you’re in a relaxed state – paradoxical though that might seem!