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The Lower Temperature Threshold for ...

Skutnik, Benjamin C.,

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The Lower Temperature Threshold for Open Water Swimming /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The Lower Temperature Threshold for Open Water Swimming // Benjamin C Skutnik.
作者:	Skutnik, Benjamin C.,
面頁冊數:	1 electronic resource (125 pages)
附註:	Source: Dissertations Abstracts International, Volume: 86-07, Section: B.
Contained By:	Dissertations Abstracts International86-07B.
標題:	Kinesiology. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31764449
ISBN:	9798302180759

The Lower Temperature Threshold for Open Water Swimming /
Skutnik, Benjamin C.,

The Lower Temperature Threshold for Open Water Swimming /Benjamin C Skutnik. - 1 electronic resource (125 pages)

Source: Dissertations Abstracts International, Volume: 86-07, Section: B.

World Aquatics mandates use of wetsuits during open water swimming at water temperatures ≤18°C and for competition to be cancelled when water temperature is <16°C. This competition cancelation threshold was established before the wetsuit mandate. Therefore, the safe cold-water threshold (defined as the critical cold-water temperature (Tcrit)) for open water swimming while wearing a wetsuit is unknown. Therefore, we tested the hypothesis that Tcrit while wearing a wetsuit is below the mandated 16°C water temperature threshold. Additionally, we tested the hypothesis that Tcrit would be lower in full-length wetsuits when compared to sleeveless wetsuits. Twenty competitive swimmers (8 women) completed a constant workload cold-water swim in a flume while wearing a World Aquatics approved wetsuit. Swimming intensity was determined by matching heart rate to that observed during a self-paced 3 km swim. During the experimental trial, water temperature was initially set at ~16°C and progressively decreased to a minimum of ~13°C. Core temperature was continuously recorded. Every 30 minutes, oxygen uptake and RER were measured via open circuit indirect calorimetry and used to estimate metabolic heat production (Hprod). Tcrit was defined as the water temperature at which core temperature began to decrease, as determined by segmental regression. Hprod was analyzed during the initial 30 min and final 30 min of the trial. Pearson correlations were used to compare associations between Tcrit and anthropometric variables. Tcrit was lower than 16°C (14.98°C ± 0.39°C, p < 0.0001). Tcrit did not differ between men and women (14.89°C ± 0.64°C vs. 14.99°C ± 0.42°C; p = 0.6942). There were no differences in Hprod when comparing the initial (484 ± 61 W/m2) and final (472 ± 61 W/m2; p = 0.5680) 30 min of the trial. No association between Log10Tcrit and anthropometric variables reached statistical significance. There were differences in Tcrit when wearing either the full-length or sleeveless wetsuits (15.18°C ± 0.47°C vs. 15.26°C ± 0.46°C; p = 0.7869). The safe cold-water temperature threshold for open water swimming while wearing a wetsuit is lower than 16°C and does not differ between men and women or suit type.

English

ISBN: 9798302180759Subjects--Topical Terms:

517627
Kinesiology.
Subjects--Index Terms:

Exercise testing

The Lower Temperature Threshold for Open Water Swimming /
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520 $a World Aquatics mandates use of wetsuits during open water swimming at water temperatures ≤18°C and for competition to be cancelled when water temperature is <16°C. This competition cancelation threshold was established before the wetsuit mandate. Therefore, the safe cold-water threshold (defined as the critical cold-water temperature (Tcrit)) for open water swimming while wearing a wetsuit is unknown. Therefore, we tested the hypothesis that Tcrit while wearing a wetsuit is below the mandated 16°C water temperature threshold. Additionally, we tested the hypothesis that Tcrit would be lower in full-length wetsuits when compared to sleeveless wetsuits. Twenty competitive swimmers (8 women) completed a constant workload cold-water swim in a flume while wearing a World Aquatics approved wetsuit. Swimming intensity was determined by matching heart rate to that observed during a self-paced 3 km swim. During the experimental trial, water temperature was initially set at ~16°C and progressively decreased to a minimum of ~13°C. Core temperature was continuously recorded. Every 30 minutes, oxygen uptake and RER were measured via open circuit indirect calorimetry and used to estimate metabolic heat production (Hprod). Tcrit was defined as the water temperature at which core temperature began to decrease, as determined by segmental regression. Hprod was analyzed during the initial 30 min and final 30 min of the trial. Pearson correlations were used to compare associations between Tcrit and anthropometric variables. Tcrit was lower than 16°C (14.98°C ± 0.39°C, p < 0.0001). Tcrit did not differ between men and women (14.89°C ± 0.64°C vs. 14.99°C ± 0.42°C; p = 0.6942). There were no differences in Hprod when comparing the initial (484 ± 61 W/m2) and final (472 ± 61 W/m2; p = 0.5680) 30 min of the trial. No association between Log10Tcrit and anthropometric variables reached statistical significance. There were differences in Tcrit when wearing either the full-length or sleeveless wetsuits (15.18°C ± 0.47°C vs. 15.26°C ± 0.46°C; p = 0.7869). The safe cold-water temperature threshold for open water swimming while wearing a wetsuit is lower than 16°C and does not differ between men and women or suit type.
546 $a English
590 $a School code: 0093
650 4 $a Kinesiology. $3 517627
650 4 $a Physiology. $3 518431
650 4 $a Thermodynamics. $3 517304
653 $a Exercise testing
653 $a Swimming
653 $a Thermoregulation
653 $a Triathlon
653 $a VO2max
690 $a 0575
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690 $a 0348
710 2 $a Indiana University. $b School of Public Health. $e degree granting institution. $3 3770577
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