In today’s newsletter: What happens when you stop eating gluten, why running can be a superior form of exercise, and how autism differs in girls and women. 

But first: Here are the causes of frozen shoulder.

PHOTOGRAPH BY K H FUNG, SCIENCE PHOTO LIBRARY

Adhesive capsulitis, or “frozen shoulder,” is a painful affliction that can last for years. And the condition appears to strike women—particularly those entering or past menopause—more commonly than anyone else. Here's what we know about the condition, and the new treatments that may finally promise a cure. 

More stories:
— Painkillers don’t work as well for women. Here’s why.
— Could menopause be delayed? The answer could lead to longer lifespans for women.

PHOTOGRAPH BY SOPHIE CHIVET, VU/REDUX AGENCY

Autism diagnoses have climbed by 175 percent in just the past decade—with the greatest increases in girls and women. Here’s how our understanding of autism is changing.

PHOTOGRAPH BY AILEEN SON, THE NEW YORK TIMES/REDUX

PHOTOGRAPH BY SUSANNAH KAY, GUARDIAN/EYEVINE/REDUX

It’s the world’s oldest sport, dating back millennia—and today some 50 million Americans of all ages regularly engage in the activity. Here's why running is one of the best ways to exercise and how it can help you live longer.

BEFORE YOU GO: Here’s a science-backed guide to mindful breathing.

Today’s newsletter was edited and curated by Jennifer Baik and produced by Alisher Egamov. Did someone forward this to you? Sign up here to get this newsletter and more.