Originally Posted by
ankietyjoe
It's very common for your heart to pound at night with anxiety.
Fitbits aren't the best devices to accurately record heart rates though, they are notoriously inaccurate and prone to doubling the actual reading.
It's very likely that your heart rate could be anything from 50-150bpm at night depending on whether you are dreaming, rested, relaxed, anxious or having a nightmare. A fast heart rate in itself is not dangerous in any way, it's simply responding to stimulus and doing what it's designed to do.