NEWS YOU CAN USE: How Exercise Can Help Us Sleep Better.

The preliminary message of these findings is heartening. If you habitually experience insomnia and don’t currently exercise, Dr. Baron said, start. Don’t, however, expect that you will enjoy or even complete workouts that occur on the day after a broken night’s sleep, or that you will sleep better hours after you’ve exercised.

The process is more gradual and less immediately gratifying than the sleep-deprived might wish. But the benefits do develop. “It took four months” in the original study, Dr. Baron said, but at that point the exercising volunteers “were sleeping at least 45 minutes more a night.” “That’s huge, as good as or better” than most current treatment options for sleep disturbances, including drugs, she said.

Not a quick fix, then.