Acute transcutaneous CO2 exposure: A feasibility study for the future investigation of CO2-specific exercise adaptations
Bibliographic record
Abstract
Blood flow restricted (BFR) exercise induces musculoskeletal adaptations at reduced exercise loads. The role of hypercapnia during BFR remains unclear, due to difficulties in isolating this factor in vivo. We evaluated a hypercapnic model designed to raise CO 2 levels similar to low-intensity exercise, while minimizing other exercise-induced effects (e.g. hypoxia , lactate accumulation). In a crossover design, 18 participants were administered pure CO₂ (EXP) or room air (CON) transcutaneously from the neck down for 90 min. Ventilatory and blood markers (V̇CO 2 , ETCO 2 , V̇E, pH, and PCO 2 ) were measured throughout. The area under the curve of ETCO 2 was higher during EXP compared to CON (75.5 ± 83.7 vs. 32.8 ± 57.5 a.u., p = 0.05), confirming successful CO 2 administration. However, there was no significant effect on PCO 2 (p = 0.09), despite a trend toward reduced pH (p = 0.059). CONCLUSION: While transcutaneous CO 2 absorption induced a physiological response , the magnitude was small, and this model shows limited ecological validity to simulate exercise-like conditions.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| 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 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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 teacher head, 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".