Heart rate zones aren’t a perfect measure of exercise intensity, but regularly getting your heart pumping is still important for fitness

Both high- and moderate-intensity exercise provides similar overall health benefits.

Jason Sawyer, Associate Professor of Exercise and Movement Science, Bryant University • conversation
April 1, 2024 • ~8 min

How do pacemakers and defibrillators work? A cardiologist explains how they interact with the electrical system of the heart

Heart rates that are too slow or too fast can sometimes be lethal. Medical implants can help the heart get its rhythm back.

Virginia Singla, Clinical Assistant Professor of Cardiology, University of Pittsburgh • conversation
Dec. 11, 2023 • ~10 min

How signals from your body could be making you anxious

Do you get scared if you feel your heart speed up?

Kiera Louise Adams, PhD Candidate of Experimental Psychology, University of Oxford • conversation
March 1, 2023 • ~7 min

Heart rate variability – what to know about this biometric most fitness trackers measure

Tiny fluctuations in the time between each beat of your heart can provide clues about how much stress your body is experiencing.

Anne R. Crecelius, Associate Professor of Health and Sport Science, University of Dayton • conversation
Dec. 26, 2022 • ~8 min

I listened to animals' hearts to reveal their hidden emotional worlds

Measuring the heart rate of animlas can reveal their changing emotional state, even when their behaviour stays the same.

Claudia Wascher, Senior Lecturer, Animal and Environmental Biology, Anglia Ruskin University • conversation
June 28, 2021 • ~7 min

Isolating together is challenging – and relationship stresses can affect biological functioning

A study found the emotional dynamic between young heterosexual partners can have a measurable physiological effect on men, but not on women.

Hannah L. Schacter, Assistant Professor of Psychology, Wayne State University • conversation
April 13, 2020 • ~6 min

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