Flow is defined as an optimal state characterized by individuals becoming deeply absorbed in a task. Flow research typically involves collecting physiological data during a task and associating them with subsequently completed self-reports. However, this approach is limited, as self-reports provide cumulative assessment of the experience, lacking the temporal resolution required to be analysed with physiological data and failing to capture flow as it unfolds in real time. Here, we introduced a novel method that enabled the continuous and real-time collection of subjective and physiological measurements of flow. Participants continuously indicated their perceived degree of flow by pressing a custom-made foot pedal during the task (i.e., pedal-recorded flow). They (N = 40) played the video game Thumper in two conditions: one with the pedal and one without, while their heart rate was recorded using electrocardiography. After each condition, participants completed a self-report (i.e., Flow Short Scale, FSS in short). Thereby, we investigated whether pedal interfered with (a) participants’ flow experience and (b) physiological responses (i.e. heart rate variability), and whether (c) pedal-recorded flow reliably correlated with flow scores obtained through the FSS. Results indicated that the pedal did not interfere with (a) participants' flow experience or (b) heart rate variability. Moreover, (c) pedal-recorded flow during the second half of the task showed correlation with the flow measured by FSS, suggesting that pedal provided a reliable measure of flow experience.