Although an overall decrease in BDNF levels was observed post-stroke (Figure 2), stratifying post-stroke patients based on 6MWT performance displayed significantly higher BDNF levels in patients who improved most (i.e., ≥34 m) and received the intervention (Figure 4), probably signifying a beneficial role of exercise in reducing the decline in BDNF levels. The gene discussed is BDNF; the disease is Stroke.