Oxyhemoglobin comparison at baseline and 4 weeks within and between groups. Oxyhemoglobin, OxyHb; E‐Stim, electrical stimulation; HR2S, hemodynamic response to stress; min, minutes; Δ, Delta. Generalized Estimating Equations were performed to assess the group × time × effect interaction of E‐Stim over OxyHb at 0, 60, and 70 min within and between groups. Baseline (a) Absolute and (b) Normalized to 0% change ΔOxyHb values (e.g., [OxyHb at t
0 − OxyHb at t
60 or t
70]/[OxyHb at t
0] * 100) in each time point. (c) A typical case of a patient in the intervention group showing a continuous decrease of OxyHb values after stopping 1 h E‐Stim for 10 min (70 min). Four weeks (d) Absolute and (e) Normalized to 0% change ΔOxyHb values (e.g., [OxyHb at t
0 − OxyHb at t
60 or t
70]/[OxyHb at t
0] * 100) in each time point. (f) A typical case of a patient from the intervention group showing a regain of OxyHb values after stopping 1 h E‐Stim for 10 min (70 min). * Statistically significant (p ≤ 0.05).