I say that Dr. Michael Joyner is talking BS when he says...
"it is an old wives' tale with no data to support it.
From the NY Times article by Gina Kolata where they quote ROJO...
"Many tell athletes that what really matters is a good long sleep two nights before the event. But Dr. Michael Joyner, an exercise researcher at the Mayo Clinic, said that is an old wives’ tale with no data to support it."
What does Gina Kolata know and did she get a second or third opinion before running with the story?
The answer is, "No!"
Is she or Dr. Michael Joyner experienced marathoners?
The answer is, "No!"