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Might be referring to: a normal resting heart rate should be 60–100 beats per minute, but it can vary from minute to minute. It can go up to 130–150 beats or higher per minute when you're exercising – that's normal because the body needs to pump more oxygen-rich blood around the body.7 Jul 2020.
This is a seasonal trend that repeats every December.
This trend is forecasted to be growing in the next 2 years.