A TEST TO ESTABLISH MAXIMUM VO2 DESPITE NO PLATEAU IN THE VO2 DATA RESPONSE.
Bibliographic record
Abstract
PURPOSE The VO2 response to ramp-incremental exercise does not consistently demonstrate plateau-like behaviour at the subject's limit of tolerance. The requirements for a VO2max are therefore not met despite apparent maximum effort. We therefore wished to determine whether a high constant-load test subsequent to the maximum ramp would provide the necessary criterion for a VO2max even when the data from the components of the test do not themselves manifest a plateau. METHODS Seven healthy male adults performed, as a single protocol, a ramp-incremental test (RI: 25–30 W/min) to the limit of tolerance on a cycle ergometer, followed by 5 min recovery at 20W and then square-wave test (SE) at 105% of the final work rate (WRmax) achieved during the ramp; the entire ramp-incremental square-wave exercise (RISE-105) test lasted ∼20 min. On a separate occasion, 5 of these subjects also performed a RISE-95 test where the RI was followed by SE at 95% WRmax. VO2 was measured breath-by-breath by turbine and mass spectrometer. VO2 data were filtered and time-averaged, and the average VO2 calculated during the final 5 s interval of each of the RI and SE tests was taken as the peak VO2. RESULTS A plateau in VO2 was not seen during any of the RI or SE tests in these subjects. The WRmax (mean (±SD)) reached on the two components of RISE-105 were 470 (41) W and 495 (42) W, respectively. Peak VO2's for this protocol were not different (p = 0.642): 4.28 (0.45) L/min (RI) and 4.31 (0.53) L/min (SE). In those subjects who also performed the RISE-95 protocol, the WRmax was sequentially 450 (45) W and 427 (43) W. No differences (p = 0.938) were found between the peak VO2's reached during either of the tests: 4.13 (0.45) L/min and 4.10 (0.49) L/min for RISE-105, and 4.09 (0.46) L/min and 4.11 (0.52) L/min for RISE-95. CONCLUSIONS The similarity between the peak VO2's established from the RISE components of our protocol provides the plateau criterion for VO2max to be established during a single test even when the data themselves do not plateau. Supported by NSERC, Canada and The Wellcome Trust, UK
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".