How Nebivolol Affects Resting Heart Rate

Nebivolol blocks beta-1 receptors in the heart, slowing the sinus node and reducing how hard the heart contracts in response to adrenaline. It also releases nitric oxide in blood vessels, which lowers blood pressure without the cold hands and fatigue of older beta blockers.

What it does not change: oxygen use at a given workload. When heart rate is held down, stroke volume rises to compensate, so the muscles get the same oxygen (Joyner 1986, PMID 2871007). People training on beta blockers still improve VO2max (Svedenhag 1984, PMID 6144241).

At rest and during exercise: 5 mg lowered heart rate at rest, at submaximal and at maximal exercise in physically active people with hypertension, while maximal work was unchanged (Predel 2001, PMID 11607802).

Compared with atenolol: nebivolol lowers exercise heart rate less and does not reduce exercise tolerance (Van Bortel 1992, PMID 1353367).

User reports: about 10 bpm off resting heart rate at 5 mg is the most common report.

Timing: the effect appears within days. Stopping abruptly can cause rebound tachycardia, so taper under a doctor.

Track: morning resting heart rate and home blood pressure. Bloods are not the main monitoring tool.

Cardio: zones based on heart rate read low on nebivolol. A heart rate that was easy zone 2 before may now be above it. Set zone 2 by the talk test and a fixed speed or wattage. Cardiac rehab research treats percentage-of-peak heart rate as unreliable on beta blockers and leans on heart rate reserve, workload or effort ratings instead (Zanettini 2012, PMID 21450591).

Resting heart rate below 45 with dizziness or fatigue: the dose may be too high.

See why your zone 2 heart rate is wrong on clen, T3 and tren and lowering blood pressure on cycle.

• Use nebivolol for blood pressure or a genuinely raised resting heart rate with a doctor's input, not to hide a clenbuterol or T3 heart rate.
• If you run it with clenbuterol, the two drugs pull in opposite directions and heart rate stops telling you anything useful. Lower the stimulant instead.
• Do not stop it suddenly; taper.
• Beta blockers are prohibited in some sports; check the rules if you are tested.