Emotion regulation and affect are closely linked, but little is known about the directionality of their associations in daily life contexts, there is a particular lack of studies that include positive affect and its upregulation, and numerous methodological limitations constrain conclusions that can be drawn. We tested bidirectional associations of four emotion regulation strategies (distraction, reappraisal, rumination, savoring) with positive and negative affect, using ecological momentary assessment. Adult community participants (