Smartwatches didn't launch with the first Apple Watch in 2015. The Seiko Ruputer—introduced in 1998—is generally considered the first of its kind. However, today's devices are truly next-level ...

If you wear a Fitbit, Apple Watch or a similar wearable while working out, you already know that you have a useful tool right at your fingertips. One especially helpful feature wearables like these ...

Dr. Richard Page answers the question: 'What Causes Defibrillator To Fire?' — -- Question: What kind of heart rhythm problems will cause my defibrillator to fire? Answer: Your defibrillator is ...

Milliseconds of variability, now detected by fitness watches, can improve well-being Earlier this year I got an Oura ring to track the state of my health. Soon I was obsessing over my sleep and ...

Whether due to stress or an intense cardio workout, most of us have felt our heart racing from time to time. A rise in your heart rate can be perfectly normal given outside circumstances. However, ...

Taking easy runs too fast is a common habit among runners, much to the chagrin of coaches everywhere. I know staying in the zone 2 range is critical for aerobic development, and after lowering my ...

A recent study showed that the heart rate variability of a dog and its owner adapt to each other during interaction. High heart rate variability is associated with relaxation, while low heart rate ...

Doing easy runs too fast is a common habit among runners, much to the chagrin of coaches everywhere. I know that staying in zone 2 is critical for aerobic development – and after lowering my ‘easy’ ...