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dc.contributor.authorBorg, David N
dc.contributor.authorCostello, Joseph T
dc.contributor.authorBach, Aaron J
dc.contributor.authorStewart, Ian B
dc.date.accessioned2019-12-03T01:14:43Z
dc.date.available2019-12-03T01:14:43Z
dc.date.issued2017
dc.identifier.issn0031-9384
dc.identifier.doi10.1016/j.physbeh.2016.12.009
dc.identifier.urihttp://hdl.handle.net/10072/389459
dc.description.abstractObjective: The perceptual strain index (PeSI) has been shown to overcome the limitations associated with the assessment of the physiological strain index (PSI), primarily the need to obtain a core body temperature measurement. The PeSI uses the subjective scales of thermal sensation and perceived exertion (RPE) to provide surrogate measures of core temperature and heart rate, respectively. Unfortunately, thermal sensation has shown large variability in providing an estimation of core body temperature. Therefore, the primary aim of this study was to determine if thermal comfort improved the ability of the PeSI to predict the PSI during exertional-heat stress. Methods: Eighteen healthy males (age: 23.5 years; body mass: 79.4 kg; maximal aerobic capacity: 57.2 ml·kg− 1·min− 1) wore four different chemical/biological protective garments while walking on treadmill at a low (< 325 W) or moderate (326–499 W) metabolic workload in environmental conditions equivalent to wet bulb globe temperatures 21, 30 or 37 °C. Trials were terminated when heart rate exceeded 90% of maximum, when core body temperature reached 39 °C, at 120 min or due to volitional fatigue. Core body temperature, heart rate, thermal sensation, thermal comfort and RPE were recorded at 15 min intervals and at termination. Multiple statistical methods were used to determine the most accurate perceptual predictor. Results: Significant moderate relationships were observed between the PeSI (r = 0.74; p < 0.001), the modified PeSI (r = 0.73; p < 0.001) and unexpectedly RPE (r = 0.71; p < 0.001) with the PSI, respectively. The PeSI (mean bias: − 0.8 ± 1.5 based on a 0–10 scale; area under the curve: 0.887), modified PeSI (mean bias: − 0.5 ± 1.4 based on 0–10 scale; area under the curve: 0.886) and RPE (mean bias: − 0.7 ± 1.4 based on a 0–10 scale; area under the curve: 0.883) displayed similar predictive performance when participants experienced high-to-very high levels of physiological strain. Conclusions: Modifying the PeSI did not improve the subjective prediction of physiological strain. However, RPE provided an equally accurate prediction of physiological strain, particularly when high-to-very high levels of strain were observed. Therefore, given its predictive performance and user-friendliness, the evidence suggests that RPE in isolation is a practical and cost-effective tool able to estimate physiological strain during exertional-heat stress under these work conditions.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.publisher.placeUnited States
dc.relation.ispartofpagefrom216
dc.relation.ispartofpageto223
dc.relation.ispartofjournalPhysiology & Behavior
dc.relation.ispartofvolume169
dc.subject.fieldofresearchBiological sciences
dc.subject.fieldofresearchBiomedical and clinical sciences
dc.subject.fieldofresearchClinical sciences
dc.subject.fieldofresearchPsychology
dc.subject.fieldofresearchcode31
dc.subject.fieldofresearchcode32
dc.subject.fieldofresearchcode3202
dc.subject.fieldofresearchcode52
dc.titlePerceived exertion is as effective as the perceptual strain index in predicting physiological strain when wearing personal protective clothing
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationBorg, DN; Costello, JT; Bach, AJ; Stewart, IB, Perceived exertion is as effective as the perceptual strain index in predicting physiological strain when wearing personal protective clothing, Physiology & Behavior, 2017, 169, pp. 216-223
dc.date.updated2019-12-03T01:07:10Z
gro.hasfulltextNo Full Text
gro.griffith.authorBach, Aaron J.


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