Fig. 2

Diastolic blood pressure (DBP) changes during the 10-minute NLT. Baseline blood pressure was measured while participants rested supine, then every minute upon standing for the 10-minute NLT. All participants had a similar, sudden increase in DBP immediately after standing. (Baseline DBP: < 4 ME/CFS 76.89 SD ± 8.89, > 10 ME/CFS 76.57 SD ± 10.56, HCs 75.54 SD ± 10.18; DBP after standing 1 min: < 4 ME/CFS 86.55 SD ± 10.69, > 10 ME/CFS 84.11 SD ± 8.74, HCs 83.06 SD ± 10.38). DBP increased significantly for < 4 and > 10 ME/CFS after 3 min standing compared to HCs