Growing research converge face-to-face interaction mutually influences spontaneous postures and gestures to show. This phenomenon is referred to as motor resonance. Studies on psychotherapy sessions, reported spontaneous and mirrored body movements emerged in therapists and patients (Ramseyer & Tschacher, 2011). However, affective context may play a role in the strength motor resonance. Based on the philosophical framework by Mühlhoff (2015), we propose to test the affective resonance theory. In a face-to-face study, we used the social robot Nao to investigate the role of affective context (i.e., positive or negative) in triggering motor resonance in humans. Nao was programed to exhibit cowering (sad) or open (happy) body language; Nao moved slow or fast to exhibit energy levels. Participants attended a single experimental session during which Nao moved slow and fast, while it narrated a sad or happy stories. Concurrently, the kinematic activity of each participant was recorded using a motion-capture system. Additional measures included self-reported affect, and a questionnaire pertaining to the robot’s social attributes. Results show that more human body movements and sway were measured when Nao moved fast than when it moved slow. Additionally, movement patterns were influenced by the affective context. Overall, our results indicate that core affect can influence interaction dynamics. Future studies manipulating emotional context need to be conducted now in human-human interaction to generalize the affective resonance theory to social interaction