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Having an elevated heart rate when you wake up can inspire all kinds of questions. Here's a primer on what to do when this happens.
High resting heart rate predicts heart risk in women at midlife - Harvard Health
I have 145 and sometimes higher heart rate. When does it become dangerous? My doctor says I am healthy. I have high blood pressure too. - Quora
What your heart rate is telling you - Harvard Health
Heart Rate Spike upon Waking - Fitbit Community
Resting heart rate too high? - Fitbit Community
Heart Rate Variability and Sleep - Amerisleep
How Many Times Does Your Heart Beat in a Day?
Resting Heart Rate 101: Everything You Need To Know
The heart rate secret: what it reveals about our health – from sleep and alcohol to fight or flight, Health & wellbeing
Heart Rate and Blood Pressure: Key Differences
