All articles

What is a good HRV? An HRV chart by age and sex, and how to read your own number

Why is my HRV so low? What a low heart rate variability actually means

How to improve your HRV: what actually works, and how long it takes

Sleep apnea treatment options: CPAP, the best CPAP alternatives, and how to tell if it's working

Could I have sleep apnea? The signs to watch, and what your tracker can (and can't) tell you

Thyroid problems in women: the signs to watch, why they're so common, and when they get missed

Is it your thyroid, or something else? Sorting fatigue, brain fog, and weight change from the look-alikes

Your thyroid and your heart rate: how an underactive or overactive thyroid shows up in your pulse and HRV

Hyperthyroidism symptoms: the signs of an overactive thyroid — racing heart, weight loss, and a body stuck in fast-forward

Hypothyroidism symptoms: the signs of an underactive thyroid, and how to tell it from everything else

Low resting heart rate: athlete's heart or something to worry about? How to tell

Resting heart rate

Why is my resting heart rate so high? The real causes, when to worry, and how to bring it down

Resting heart rate