MLB teams with greater circadian advantage are more likely to succeed

Jun 10, 2008

The magnitude of circadian advantage influences the outcome of Major League Baseball (MLB) games in that teams with greater circadian advantage are more likely to win, according to a research abstract that will be presented on Tuesday at SLEEP 2008, the 22nd Annual Meeting of the Associated Professional Sleep Societies (APSS).

Using the convention that for every time zone crossed, synchronization requires one day, teams were assigned a daily number indicating the number of days away the team was from resynchronization. Positive values indicate eastward travel, negative values westward, and a value of zero indicate synchronization with the current time zone.

Approximately 79.1 percent of the games analyzed (19,084 of 24,133 games) were played between teams at equal circadian times. The remaining 5,046 games featured teams with different circadian times. In these games, the team with the circadian advantage won 2,621 games (51.9 percent). However, 3,681 of these 5,046 games were also played with a home field advantage. In isolating games in which the away team held the circadian advantage (1,365 games), the away team won 619 games (45.3 percent).

“The magnitude of circadian advantage influenced success. When teams held a one-hour circadian advantage, winning percentage was 0.517, and winning percentage with a two-hour advantage was 0.517. When teams held a three-hour circadian advantage, winning percentage increased to 0.603,” said W. Christopher Winter, MD, of Martha Jefferson Hospital Sleep Medicine Center in Charlottesville, Virginia, lead author of the study.

“We began looking at the impact of travel and time zone changes on Major League Baseball teams in 2004. In that study, we evaluated the impact of travel on team performance, and showed that it did impact game outcome. We decided to expand the study to a 10-year retrospective period, and with MLB funding, recently completed this study which confirmed an impact of travel on team performance.”

It is recommended that adults get between seven and eight hours of nightly sleep.

Source: American Academy of Sleep Medicine

Explore further: Anthrax shipments came from military site in Utah desert

Related Stories

Teens, texting and the sleep connection

Sep 23, 2009

Between their crazy schedules and upside-down circadian rhythms, teens always have been somewhat sleep-deprived. Now technology is making it worse. Teens are not just texting, instant-messaging and surfing Facebook all day; ...

Recommended for you

Pentagon: Anthrax shipments broader than first thought

9 hours ago

The Pentagon said Friday that the Army's mistaken shipments of live anthrax to research laboratories were more widespread than it initially reported, prompting the Defense Department's second-ranking official ...

Anthrax shipments came from military site in Utah desert

May 29, 2015

The U.S. Army's mistaken shipment of live anthrax samples to government and commercial laboratories occurred at a military post in a desolate stretch of the Utah desert that has been testing chemical weapons ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.