What is a normal heart rate?

For a resting adult, normal is 60 to 100 beats per minute, per MedlinePlus's vital-signs table - with an important asterisk: well-trained athletes routinely rest in the 40s and 50s, because a strong heart moves more blood per beat, so lower can be fitter, not sicker. Your pulse is a live readout, not a fixed setting: it rises with exercise, stress, caffeine, fever, dehydration, and some medications (decongestants push it up; beta-blockers pull it down), so a single fast reading after climbing stairs says nothing - measure at rest, seated, after five quiet minutes. The patterns worth attention: a resting rate persistently over 100 (tachycardia) or under 60 with symptoms (dizziness, fainting, breathlessness); a rate that races or pounds without a reason; and - often more telling than speed - rhythm: a pulse that skips, flutters, or races irregularly deserves an EKG, because rhythm problems (like atrial fibrillation) matter more than rate alone. How to check yourself: two fingers on the thumb side of your wrist or on your neck, count 30 seconds, double it. And the red line: a racing pulse with chest pain, severe breathlessness, or fainting is an emergency, not a data point. Pymander is a free AI doctor, 24/7 by text, that can help you interpret your readings.