Information on the daily stability–variability of decision-making social cognitions has not been obtained. Two purposes were: (1) to examine the correspondence between 1-week prospective and daily measures of acute exercise thoughts, decisional struggle, coping frequency, and coping self-efficacy and (2) prediction of moderate exercise. Seventy-seven experienced exercisers (M age=22.36 years) completed a 1-week prospective and daily measures of social cognitions. Prospective and aggregated daily acute thoughts were the only non-correspondent measures. Aggregated daily acute thoughts were the only significant predictor of exercise (ßstandardized=.78, p<.01). Daily acute thoughts may be a determinant of moderate exercise in experienced exercisers due to the unpredictable nature of daily events, warranting attention to making daily exercise decisions.