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Emerging work suggests that acute, moderate-intensity aerobic exercise may help to subserve episodic memory of neutral stimuli. Less investigated, however, is whether acute exercise is associated with enhanced memory recognition of emotional stimuli, which was the purpose of this experiment. A parallel-group randomized controlled experiment was employed. Participants (mean age = 20 yr) were randomized into an exercise ( n = 17) or control group ( n = 17). The exercise group engaged in a 15-min bout of moderate-intensity treadmill walking. Emotional memory recognition was assessed via images from the International Affective Picture System, including assessments of varying degrees of valence and arousal. Memory recognition was assessed at 1 day, 7 days, and 14 days post-memory encoding. We observed a significant main effect for time (F(2) = 104.2, p &lt; 0.001, η² p = 0.77) and a significant main effect for valence⁻arousal classification (F(4) = 21.39, p &lt; 0.001, η² p = 0.40), but there was no significant time by group interaction (F(2) = 1.09, p = 0.34, η² p = 0.03), classification by group interaction (F(4) = 0.12, p = 0.97, η² p = 0.01), time by classification interaction (F(8) = 1.78, p = 0.08, η² p = 0.05), or time by classification by group interaction (F(8) = 0.78, p = 0.62, η² p = 0.02). In conclusion, emotional memory recognition decreased over the 14-day follow-up period and this rate of memory decay was not altered by acute moderate-intensity exercise engagement. We discuss these findings in the context of exercise intensity and the temporal effects of exercise.

The Experimental Effects of Acute Exercise on Long-Term Emotional Memory