Dear Doctors: Is it OK to go without shoes? I’ ve heard conflicting information. I wear supportive shoes for exercise and in public, but I prefer bare feet at home.

Grounding (or earthing)—essentially, the practice of making physical contact with the Earth’s surface, also known as walking barefoot—has been a thing among true wellness heads for a minute now.

Proper footwear is essential for activities like running, hiking or tennis – and lacing up a fresh pair of trainers can feel like as much of a gym flex as hitting a PB. But have you ever thought about ...