Fitness

They buried it in the seventh paragraph: Tai Chi, yoga, walking, jogging.

"As the researchers had expected, people who received CBT saw significant improvements in their sleep quality and duration, as did those who practiced Tai Chi, yoga, and walking or jogging. Of these, yoga was linked to almost two hours of extra sleep compared to controls, while walking or jogging was tied to a significant reduction in the severity of people’s self-reported symptoms. And Tai Chi apparently provided the most benefits for sleep of all the exercises tested."

We have plenty of studies that exercise improves sleep, both in people with regular sleep patterns and those struggling with insomnia.

This particular study, which concludes that yoga and tai chi are even better than most exercise, seems to be based on more limited data.

Rather than chase after the type of exercise that has the best results in a particular study, it's probably better to try for the type of exercise you're most likely to stick with on a regular basis, for better adherence to the general idea of regular exercise. Then get the general benefits of exercise, including improved sleep, that have been broadly proven with many studies.