**3.1 Subjective fatigue assessment**

A total of 21 participants reached the targeted fatigue level within 30 to 60 minutes. The remaining subjects fatigued either too quickly (N = 3) or not sufficiently (N = 6) during the intervention, and hence were not included in the analysis.

The mean absolute gain in perceived muscle fatigue was the slightly lower for the SSCO compared to the CTRL (**Table 2**). Regarding the perceived impact of each insole condition, 63% of the participants experienced improvements in foot fatigue while wearing the SSCO, and 40% experienced the same effect while wearing the CTRL.
