Bradycardia is slower than 60 bpm and can cause symptoms
“While tachycardia makes your heart race, bradycardia is the opposite. It is when your heart beats slower than 60 times per minute. For well-trained athletes, a slow heart rate is completely normal and even a sign of efficiency. But for others, it can cause dizziness, fatigue, and shortness of breath because the heart is not pumping enough blood to meet the body's demands. Supporting regular physical activity, quality sleep, and routine health checkups are lifestyle habits that help keep your heart rhythm balanced and your cardiovascular system running smoothly.”
Summary
Tachycardia is a fast heart rate (over 100 bpm) and bradycardia is a slow heart rate (under 60 bpm). A low resting rate is normal and often a sign of cardiovascular efficiency in well‑trained athletes, while in non‑athletes it can cause dizziness, fatigue, and shortness of breath due to insufficient blood flow. Maintaining regular exercise, good sleep, and routine medical check‑ups supports a healthy heart rhythm.
Sources 60 searched
- Bradycardia (Low Heart Rate): Symptoms, Causes, and Treatment
Bradycardia is a slower-than-usual heart rhythm, and tachycardia is a faster-than-usual heart rhythm, usually more than 100 beats a minute. Your heart has four chambers, two on the top called atria and two on the bottom called ventricles.
- Tachycardia: Symptoms, Causes, Diagnosis, Treatment
Supraventricular tachycardia (SVT): An arrhythmia causing faster heartbeats, palpitation, giddiness & breathing difficulties. Learn symptoms, causes & treatment.View now ... Written by Lori M. King, PhDMedically Reviewed by Lalitha Kadali on August 24, 2026 · Is your resting heart rate slower than normal? If it is too slow, then it could be a heart rhythm disturbance called bradycardia.View now
- Tachycardia - Symptoms and causes - Mayo Clinic
Learn more about the symptoms and treatment of this heart rhythm disorder, which causes a very fast heartbeat.
- Bradycardia - Symptoms and causes - Mayo Clinic
Find out more about the symptoms, diagnosis and treatment of a slower than typical heartbeat.
- Tachycardia vs. Bradycardia | Mass General Brigham
Bradycardia, where your resting heart rate is slow — usually less than 60 beats per minute. Tachycardia, where your resting heart rate is fast — more than 100 beats per minute.
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- AnMed | When to Be Concerned About a Racing Heartbeat
An irregular heartbeat – called an arrhythmia – occurs when your heart beats abnormally. This may mean your heart skips a beat (heart palpitations), your heart rate races (tachycardia) or your heart rate becomes too slow (bradycardia).
- Heart Rhythm Disorder | Tachy-Brady Syndrome | MedStar Health
If you have tachy-brady syndrome, also known as tachycardia-bradycardia syndrome, your heart fluctuates between beating too quickly (tachycardia) and too slowly (bradycardia).
- Bradyarrhythmia: Symptoms, Causes and Treatment
Bradyarrhythmia is a slower-than-typical heart rate due to an irregular heart rhythm. People sometimes need a pacemaker to restore a healthy heart rhythm.
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