Exercise temperature regulation following a 35‐day horizontal bedrest
Bibliographic record
Abstract
New Findings What is the central question of this study? Does a 35‐day horizontal bedrest impair thermoeffector responses during whole‐body submaximal exercise performed in temperate conditions? What is the main finding and its importance? Cardiovascular and muscular deconditioning ensuing from prolonged recumbency seems to augment, at least to a degree, exercise‐induced increase in body core temperature, most likely due to an impairment in non‐evaporative heat loss. The response is a function of the absolute exercise intensity imposed. Abstract We examined the effects of a 35‐day horizontal bedrest on thermoregulation during whole‐body exercise. Fifteen healthy men were randomly assigned to either a bedrest (BR; n = 10) or a control (CON; n = 5) group. Prior to bedrest, both groups performed 40‐min constant‐load upright cycling at 30% of their peak workload ( W peak ; PRE). One and 2 days after bedrest, the BR group performed, in a randomised counterbalanced order, two 40‐min trials at 30% of (i) the pre‐bedrest W peak (i.e., at a fixed absolute intensity; POST‐A) and (ii) the post‐bedrest W peak (i.e., at a fixed relative intensity; POST‐R). The CON group conducted only the POST‐A trial, at the same time intervals. During the trials, rectal ( T rec ) and skin ( sk ) temperatures, and the forehead sweating rate (SwR) were monitored. In the CON group, no differences were observed between the trials. Bedrest potentiated moderately the T rec elevation during the latter part of POST‐A (∼0.10°C; P ≤ 0.05), but not of POST‐R (∼0.04°C; P = 0.11). In both post‐bedrest trials, sk was attenuated by ∼1.5–2.0°C throughout ( P < 0.01), whereas the forehead SwR was not modulated. T rec and sk were similar in POST‐A and POST‐R, yet the forehead SwR was more dependent on the relative workload imposed ( P = 0.04). The present findings therefore suggest that the cardiovascular and muscular deconditioning ensuing from a 35‐day bedrest may aggravate the exercise‐induced increase in body core temperature when working at a given absolute intensity, most likely due to an impairment in non‐evaporative heat loss.
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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 | 0.000 | 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 | 0.000 |
| 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 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".