Objective: The purpose of the current study was to examine the bidirectional relationship between physical activity (PA) and purpose in life in an older adult sample using longitudinal data. Method: Data were collected from three waves (2006, 2010, and 2014) of the Health and Retirement Study. A total of 4591 participants who had complete information of PA and purpose in life at baseline were included in the current study. A series of cross-lagged models were tested separately for vigorous-intensity PA, moderate-intensity PA, and light-intensity PA. Results: While higher levels of purpose in life were associated with more frequent engagement in future vigorous-intensity PA, moderate-intensity PA, and light-intensity PA, none of the PA variables predicted subsequent purpose in life. Discussion: The results did not support a reciprocal relationship between PA and purpose in life in older adults. It is more likely that purpose in life predicts PA, rather than vice versa.
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