Changes in respiratory function during a wilderness multisport endurance

I R Rogers; S Inglis; D Speedy; D Hillman; B Noffsinger; I Jacobs

doi:10.1580/1080-6032(2001)012[0013:CIRFDA]2.0.CO;2

Changes in respiratory function during a wilderness multisport endurance

I R Rogers, S Inglis, D Speedy, D Hillman, B Noffsinger, I Jacobs

UWA Medical School

Research output: Contribution to journal › Article › peer-review

10 Citations (Web of Science)

Abstract

OBJECTIVE: To document the changes in respiratory function seen in competitors during a typical wilderness multisport endurance event.

METHODS: A prospective observational cohort study measuring forced expiratory volume in 1 second (FEV1) and forced vital capacity (FVC) at baseline, midrace, and end of race in competitors in a 105-km ski/run/cycle/paddle race held midwinter in the mountains of Victoria, Australia.

RESULTS: Twenty-five adult subjects (22 men) between 20 and 42 years of age were studied. The mean decline in FEV1 was 15.1% (95% CI 10.3-19.8) and for FVC was 13.0% (95% CI 8.1-17.9). Fourteen (56%) of the 25 subjects had a >10% decline in FEV1 and FVC, and 7 (28%) of the 25 subjects had a >20% decline. In 9 control subjects, aged between 21 and 55 years, there was no significant change in FEV1 or FVC from prerace to end of race.

CONCLUSIONS: Significant declines in FEV1 and FVC are common during wilderness multisport endurance events. The focus of future research should be the etiology, which as yet remains speculative.

Original language	English
Pages (from-to)	13-16
Number of pages	4
Journal	Wilderness & Environmental Medicine
Volume	12
Issue number	1
DOIs	https://doi.org/10.1580/1080-6032(2001)012[0013:CIRFDA]2.0.CO;2
Publication status	Published - 2001

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title = "Changes in respiratory function during a wilderness multisport endurance",

abstract = "OBJECTIVE: To document the changes in respiratory function seen in competitors during a typical wilderness multisport endurance event.METHODS: A prospective observational cohort study measuring forced expiratory volume in 1 second (FEV1) and forced vital capacity (FVC) at baseline, midrace, and end of race in competitors in a 105-km ski/run/cycle/paddle race held midwinter in the mountains of Victoria, Australia.RESULTS: Twenty-five adult subjects (22 men) between 20 and 42 years of age were studied. The mean decline in FEV1 was 15.1% (95% CI 10.3-19.8) and for FVC was 13.0% (95% CI 8.1-17.9). Fourteen (56%) of the 25 subjects had a >10% decline in FEV1 and FVC, and 7 (28%) of the 25 subjects had a >20% decline. In 9 control subjects, aged between 21 and 55 years, there was no significant change in FEV1 or FVC from prerace to end of race.CONCLUSIONS: Significant declines in FEV1 and FVC are common during wilderness multisport endurance events. The focus of future research should be the etiology, which as yet remains speculative.",

keywords = "Adult, Altitude, Altitude Sickness/physiopathology, Cohort Studies, Female, Humans, Male, Middle Aged, Mountaineering/physiology, Prospective Studies, Respiration, Respiratory Function Tests",

author = "Rogers, {I R} and S Inglis and D Speedy and D Hillman and B Noffsinger and I Jacobs",

year = "2001",

doi = "10.1580/1080-6032(2001)012[0013:CIRFDA]2.0.CO;2",

language = "English",

volume = "12",

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T1 - Changes in respiratory function during a wilderness multisport endurance

AU - Rogers, I R

AU - Inglis, S

AU - Speedy, D

AU - Hillman, D

AU - Noffsinger, B

AU - Jacobs, I

PY - 2001

Y1 - 2001

N2 - OBJECTIVE: To document the changes in respiratory function seen in competitors during a typical wilderness multisport endurance event.METHODS: A prospective observational cohort study measuring forced expiratory volume in 1 second (FEV1) and forced vital capacity (FVC) at baseline, midrace, and end of race in competitors in a 105-km ski/run/cycle/paddle race held midwinter in the mountains of Victoria, Australia.RESULTS: Twenty-five adult subjects (22 men) between 20 and 42 years of age were studied. The mean decline in FEV1 was 15.1% (95% CI 10.3-19.8) and for FVC was 13.0% (95% CI 8.1-17.9). Fourteen (56%) of the 25 subjects had a >10% decline in FEV1 and FVC, and 7 (28%) of the 25 subjects had a >20% decline. In 9 control subjects, aged between 21 and 55 years, there was no significant change in FEV1 or FVC from prerace to end of race.CONCLUSIONS: Significant declines in FEV1 and FVC are common during wilderness multisport endurance events. The focus of future research should be the etiology, which as yet remains speculative.

AB - OBJECTIVE: To document the changes in respiratory function seen in competitors during a typical wilderness multisport endurance event.METHODS: A prospective observational cohort study measuring forced expiratory volume in 1 second (FEV1) and forced vital capacity (FVC) at baseline, midrace, and end of race in competitors in a 105-km ski/run/cycle/paddle race held midwinter in the mountains of Victoria, Australia.RESULTS: Twenty-five adult subjects (22 men) between 20 and 42 years of age were studied. The mean decline in FEV1 was 15.1% (95% CI 10.3-19.8) and for FVC was 13.0% (95% CI 8.1-17.9). Fourteen (56%) of the 25 subjects had a >10% decline in FEV1 and FVC, and 7 (28%) of the 25 subjects had a >20% decline. In 9 control subjects, aged between 21 and 55 years, there was no significant change in FEV1 or FVC from prerace to end of race.CONCLUSIONS: Significant declines in FEV1 and FVC are common during wilderness multisport endurance events. The focus of future research should be the etiology, which as yet remains speculative.

KW - Adult

KW - Altitude

KW - Altitude Sickness/physiopathology

KW - Cohort Studies

KW - Female

KW - Humans

KW - Male

KW - Middle Aged

KW - Mountaineering/physiology

KW - Prospective Studies

KW - Respiration

KW - Respiratory Function Tests

U2 - 10.1580/1080-6032(2001)012[0013:CIRFDA]2.0.CO;2

DO - 10.1580/1080-6032(2001)012[0013:CIRFDA]2.0.CO;2

M3 - Article

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SN - 1080-6032

VL - 12

SP - 13

EP - 16

JO - Wilderness & Environmental Medicine

JF - Wilderness & Environmental Medicine

IS - 1

ER -

Changes in respiratory function during a wilderness multisport endurance

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