Figure 1 . Representation of the Target (Go) and Non-target (No-go) stimuli used in the tasks and their durations.
The experimental session included three task conditions (Figure 2) all requiring the keypress by the right index finger as a response. The conditions were executed in separated randomly intermixed blocks. In the simple Keypress condition , participants were seated in a comfortable chair facing a desk with a response pad on top at 30 cm from the body. They were asked to complete the DRT with minimal motor involvement, with the right hand always placed on the response pad, they had to press a green key just flexing the right index. In theReaching condition , participants were seated as in the Keypress condition, but the response pad was positioned at 50-55 cm away from the body requiring a full arm extension to reach and press the green key (i.e., long-range arm reaching movement). The response pad distance varied based on the length of the participant’s arm. After the keypress, the participant had to return to the resting position, with both hands on the desk close to the body. In theReaching-Stepping condition , participants stood at 75-80 cm from a 130 cm tall pod with the response pad on top. They were required to take a step and extend the right arm to reach and press the green key and then come back in the rest position with the legs slightly apart and the arms at the sides. The step consisted in bringing the right leg forward, while the left one remained stationary.