Worse sleep quality predicts early drop out from physical exercise programs.

Introduction And Objective: Sleep quality (SQ) benefits from regular physical exercise (PE) practice, but the effect of SQ over behavioral aspects of PE is not well known. In this study, we tested whether sleep variables can predict the drop out risk for PE programs during a six-week critical period for habit formation at gyms.

Material And Methods: We assessed 153 volunteers, freshly enrolled at three different gyms and from both sexes, with average age of 33.