My hair is soaked. Sweat pours down my face. Pedalling madly at my first-ever cycling class at age 63, I am exhilarated and appalled. This is what vigorous exercise feels like?

Review: Oura took our favorite smart ring and made it irresistible. For women especially, the Ring 5 is worth the splurge.

Engineers have developed a new way to monitor how tiny lab-grown human heart tissues beat—by effectively "listening" to the ...

Prime Day has officially ended, but many of our favorite, hand-picked deals are still available through the weekend.