Differences in Cerebral Oxygenation Following Aerobic and Resistance Exercise
Bibliographic record
Abstract
Cerebral blood flow and oxygenation are important variables to consider for concussion diagnosis and treatment. As a result, monitoring these variables throughout progressive aerobic exercise has emerged as a potential concussion management tool, as well as an indicator for return to sport, school or work. However, such a mechanism may not be specific to the sport or workplace to which the individual is returning. Understanding how a healthy brain responds to various types of exercise has the potential to create more individualized methods of concussion management. PURPOSE: To identify the differences in cerebral oxygenation recovery following bouts of maximal resistance and aerobic exercise. METHODS: Twenty-eight physically active, healthy participants aged 18-35 were recruited, each partaking in two sessions. At the first session anthropometric measures and leg press 1-RM were determined. During the second session participants completed a maximal leg press resistance training protocol, followed 30 minutes later by a maximal aerobic protocol. Participants were connected to a cerebral oximeter and metabolic cart for monitoring. As such, cerebral oxygenation and ventilatory gas exchange variables were documented throughout the duration of exercise and for 15-minutes of passive recovery post-test. RESULTS: Maximal aerobic exercise resulted in a progressive increase in cerebral oxygenation following cessation of exercise until peaking at 70.61 ± 7.41%, 300-seconds post-test. This represents a significant rise from a baseline value of 66.00 ± 5.48%. The rise in oxygenation following aerobic exercise differed from resistance exercise from 90-seconds onwards, as resistance exercise did not result in a significant change from its 66.89 ± 5.62% baseline value. CONCLUSION: While maximal aerobic exercise resulted in significant increases in cerebral oxygenation from baseline levels throughout recovery, maximal resistance exercise did not elicit the same response. This indicates that aerobic exercise results in a metabolic strain on the brain which differs from the strain experienced as a result of resistance exercise. As such, expecting equivalent outcomes and utility as concussion management tools from both exercise methods may be misguided and requires additional research.
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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 | 0.000 | 0.001 |
| 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 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 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".