Recht LD, Lew RA, Schwartz WJ
Scientific correspondence from the journal NATURE Oct 19, 1995
Study analyzing the effect of travel across multiple time zones on the win-loss record of professional baseball teams. In summary, teams traveling from west to east had a higher win loss record than teams traveling from east to west. Recht et al hypothesizes this is caused by jet lag.
Jet lag is caused by desynchronizing your internal body clock which is set by the color of light entering the eye. Jet lag can be alleviated by a simple light protocol based on time of day. An app, Time Shifter, works very well at resetting the internal body clock.