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Record W4409566240 · doi:10.1016/j.ergon.2025.103746

Validating the recommended cumulative rest allowance equation for use in workload management

2025· article· en· W4409566240 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.
fundA Canadian funder is recorded on the work.

Bibliographic record

VenueInternational Journal of Industrial Ergonomics · 2025
Typearticle
Languageen
FieldEngineering
TopicErgonomics and Human Factors
Canadian institutionsUniversity of Waterloo
FundersNatural Sciences and Engineering Research Council of Canada
KeywordsAllowance (engineering)WorkloadRest (music)Computer scienceEngineeringReliability engineeringOperations managementMedicineOperating system

Abstract

fetched live from OpenAlex

The Recommended Cumulative Rest Allowance (RCRA) equation estimates rest requirements based on effort intensity and duty cycle and may be important when optimizing daily workload to maintain productivity without undue muscle fatigue development; however, its validity has not been confirmed. Thus, the purpose of this study was to investigate whether muscle fatigue accumulates when rest time is insufficient according to the RCRA equation, and whether no fatigue occurs in protocols deemed to have sufficient or excess rest. Thirty-two participants performed isometric triceps extensions under three protocols: insufficient rest, sufficient rest, and excess rest for the same total work. Muscle fatigue was assessed by comparing maximum voluntary exertions (MVE) before and after each protocol and investigating amplitude and frequency changes in surface electromyography recorded from the triceps. MVE significantly decreased by an average of 2.4 % after all protocols. Participants showed significantly higher EMG amplitudes and lower mean power frequencies over time during the insufficient rest protocol, however, no changes were observed in the sufficient and excess rest protocols. This provides evidence supporting that the RCRA may be a useful tool to optimize workloads in the workplace; however, studies using longer exposure times are necessary to confirm its effectiveness. • The Recommended Cumulative Rest Allowance (RCRA) estimates rest needs based on effort intensity and duty cycle. • Muscle fatigue accumulation was observed when working at a duty cycle with insufficient rest. • No muscle fatigue occurred during protocols with sufficient or excess rest, supporting the utility of the RCRA equation. • Studies with longer exposure times are required to confirm the RCRA's long-term effectiveness in workload optimization.

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.

Full frame distilled prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: Simulation or modeling
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.238
Threshold uncertainty score0.361

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0010.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

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.

Opus teacher head0.096
GPT teacher head0.299
Teacher spread0.203 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it