Not only that, it says nothing about stress levels (running is a great way to relax). How hard were you working out -- low hr runs, sprint intervals, tempo runs

Not only that, it says nothing about stress levels (running is a great way to relax). How hard were you working out -- low hr runs, sprint intervals, tempo runs? Were you already a bit sleepy? Did you have established circadian rhythms? “There’s no room for exercise to improve sleep, if people are sleeping fine. [Mr. Youngstedt] said." I am skeptical of the results when the researchers say that they cannot count on the volunteers to accurately gauge their exertion levels but they can accurately gauge the quality of their sleep (remembering of course that 6hrs good sleep feels more restful than 8 on a plane). Also, gauging over-training is a pretty difficult exercise (pardon the pun) which definitely messes with a person.