The Luna ring doesn't have any standout features, but it's a solid alternative to Oura—provided you can find one.

Background Coronary microvascular dysfunction (CMD) is associated with a poor prognosis but is difficult to diagnose non-invasively. In a recent paper, ST-segment depression on exercise-ECG was found ...

Me 🤝 wearing my ring 24/7 ...

Like many Americans, I know I need more sleep. I'm a night owl, often writing late into the night, but also a mom who gets up early with her kids. The result: I'm not getting enough rest.

Ed Carlson, CVT, VTS (Nutrition), shares how routine body and muscle scoring, quantified nutrition histories, clear calorie ...