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. Author manuscript; available in PMC: 2021 Sep 1.
Published in final edited form as: Appl Psychophysiol Biofeedback. 2020 Sep;45(3):211–220. doi: 10.1007/s10484-020-09464-1

Fig. 1. Experimental protocol.

Fig. 1

Verbal instructions regarding the mode of biofeedback and the goal for the subsequent trial were provided before each trial. For the audio biofeedback trial, the speaker symbol denotes that participants heard an audible beep when their current AGRF reached or exceeded their target AGRF. For the visual and audiovisual biofeedback trials, the visual display shown here was projected and displayed on a screen in front of the participant. The X cursor denotes the current measured AGRF during the stride cycle, and the black bar indicates the target AGRF