Suitability of verification testing to confirm attainment of VO₂max in middle-aged and older adults.

The aim of the present study was to test the utility of the verification testing procedure in confirming "true" VO₂max in older adults completing maximal cycle ergometry. Eighteen physically active men and women (age = 59.7 ± 6.3 yr, ht = 173.0 ± 8.8 cm, body mass = 83.2 ± 16.4 kg, VO₂max = 27.7 ± 5.0 mL/kg/min) completed incremental exercise, and returned 1 h after incremental exercise to complete a verification phase of constant load exercise at 105% peak work rate. During exercise, gas exchange data and heart rate (HR) were continuously monitored. VO₂max was similar (p > 0.05) between incremental and verification bouts (2329 ± 762 mL/min vs. 2309 ± 760 mL/min). Findings support use of the verification procedure to confirm VO₂max attainment in active, middle-aged and older adults completing incremental cycle ergometry. This is particularly relevant to interpretation of studies that have used repeated measurements of VO₂max to establish a training effect or when VO₂max is used for designing exercise prescriptions.