The relationships between off-job physical activity and vigor at work across time: Testing for reciprocity

The main objective of the present study was to examine the reciprocal relationships between off-job moderate to vigorous physical activity (MVPA) and vigor at work. 128 workers (60% females) from different companies, with a mean age of 39.40 years old, comprising lower supervisory and technical employees, intermediate occupations and professional and managerial workers, completed a questionnaire twice with an interval of two months, comprising measures of vigor at work (Shirom-Melamed Vigor Measure; Shirom, 2004), and self-rated levels of off-job MVPA (International Physical Activity Questionnaire; Craig et al., 2003). Structural equation modeling revealed that the level of vigor at T1 predicted the level of off-job MVPA at T2 (β = 0.22, p