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Exercise intervention does not reduce the likelihood of VOmax underestimation in older adults with hypertension. | LitMetric
The present study aimed to investigate whether training status would influence the capacity of a verification phase (VER) to confirm maximal oxygen uptake (VOmax) of a previous graded exercise test (GXT) in individuals with hypertension. Twelve older adults with hypertension (8 women) were recruited. Using a within-subject design, participants performed a treadmill GXT to exhaustion followed by a multistage VER both before and after a 12-wkcombined exercise training programme. Individual VOmax, respiratory exchange ratio (RER), maximal heart rate (HR), and rating of perceived exertion (RPE) were measured during both GXT and VER tests. Absolute and relative VOmax values were higher in VER than in GXT at baseline, but only absolute VOmax differed between bouts post-intervention (all p < 0.05). Individual VOmax comparisons revealed that 75% of the participants (9/12) achieved a VO value that was ≥3% during VER both before (range: +4.9% to +21%) and after the intervention (range: +3.4% to +18.8%), whereas 91.7% (11/12) of the tests would have been validated as a maximal effort if the classic criteria were employed. A 12-wk combined training intervention could not improve the capacity of older adults with hypertension to achieve VOmax during a GXT, as assessed by VER.
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