The Incidence of V˙O2 plateau at V˙O2max in a Cardiac-Diseased Population

Abstract We sought to determine the incidence of V˙ O 2 plateau at V˙ O 2 max in a cardiovascular-diseased (CVD) population using 4 different sampling intervals (15-breath moving average, 15 s, 30 s, and 60 s) and 3 different V˙ O 2 plateau criteria (≤50 mL · min −1 , ≤80 mL · min −1 , and ≤150 mL · min −1 ). A total of 69 people (62±10 yrs.) with recently diagnosed CVD performed a maximal exercise test (10:07±2:24 min) on a treadmill. The test was classified as maximal (n=57, 2 430±605 mL · min −1 ) if self-terminated due to fatigue or classified as symptom-limited (n=12, 1 683±438 mL · min −1 ) if symptoms presented. Chi-square analysis revealed a significant (p