For this study, researchers wanted to know how different types of exercise affect sleepso they designed one of the largest and longest-running sleep-exercise trials to date.
Just under 400 adults participated, and agreed to follow different types of training plans: Some did resistance exercises (weightlifting machines), some did aerobic exercises (treadmills, bikes, or ellipticals), and some did a combination of both. The groups were supervised for 60 minutes, three times a week, doing the workouts. There was also a control group with no supervised exercise plan.
During the yearlong study, participants’ sleep metrics were also tracked. They self-reported on factors such as sleep quality, sleep duration, how long it took them to fall asleep, and how much they were disturbed throughout the night.