Normal Heart Rate: What Affects Your Pulse?

Normal resting heart rate for adults: 60–100 beats per minute (bpm). Well-trained endurance athletes often have resting rates of 40–60 bpm—a sign of cardiovascular efficiency, not pathology.

Factors Influencing Heart Rate

Factor	Effect on Heart Rate
Age	Children > adults; infants 100–160 bpm, gradually declining to adult range by adolescence.
Sex	Women average ~3–7 bpm higher than men, partly due to smaller heart size and hormonal influences.
Fitness level	Endurance training → lower resting HR (increased stroke volume, vagal tone).
Emotion	Anxiety, fear, excitement → sympathetic surge → ↑ HR.
Body temperature	Fever → ↑ ~10 bpm per 1°C (1.8°F) rise.
Medications	Beta-blockers, calcium channel blockers, digoxin ↓ HR; stimulants (caffeine, ADHD meds), decongestants, thyroid hormone ↑ HR.
Medical conditions	Anemia, hyperthyroidism, heart failure, sepsis, pulmonary embolism → ↑ HR. Hypothyroidism, heart block, electrolyte imbalance (high K⁺, high Ca²⁺) → ↓ HR.
Body position	Standing → transient ↑ HR (orthostatic response).
Dehydration	Reduced venous return → compensatory tachycardia.

When to Worry

• Persistent tachycardia (>100 bpm at rest) or bradycardia (<60 bpm) with symptoms (dizziness, syncope, dyspnea, chest pain, confusion, cold sweats) warrants prompt evaluation.
• Asymptomatic bradycardia in a fit athlete is usually normal.
• New-onset irregular rhythm (palpitations, skipped beats) should be assessed.

How to Measure Accurately

1. Rest quietly for 5 minutes.
2. Place index and middle fingers on the radial artery (wrist, thumb side) or carotid artery (neck).
3. Count beats for 30 seconds and multiply by 2, or count for 60 seconds.
4. Avoid checking immediately after exercise, caffeine, or stress.

Your heart rate is a vital sign—simple to measure, rich in information. Know your baseline and what influences it.