Hers reports on fitness trends from the 1930s to the 2020s, highlighting the evolution from gyms to modern practices like Zumba and Pilates.

I discovered spin classes a decade ago, and subsequently got certified to teach them myself. In the years since, I haven't focused on other kinds of cardio group classes—but for a time, I was obsessed ...

Aerobic exercise, such as brisk walking, running, swimming and cycling, "is strongly associated with reduced all-cause ...