Athletic performance and serial weight changes during 12- and 24-hour ultra-marathons

Wei Fong Kao, Chih Ling Shyu, Xiu Wu Yang, Teh Fu Hsu, Jin Jong Chen, Wei Chun Kao, [No Value] Polun-Chang, Yi Jen Huang, Fon Chu Kuo, Chun I. Huang, Chen Hsen Lee

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

OBJECTIVE: The principal objective of this study was to evaluate serial weight changes in athletes during 12- and 24-hour ultra-marathons and to correlate these changes with athletic performance, namely the distance covered. DESIGN: This was a prospective study. SETTING: The 2003 Soochow University international ultra-marathon. PARTICIPANTS: Fifty-two race participants. INTERVENTIONS: 12- or 24-hour ultra-marathon. MAIN OUTCOME MEASUREMENTS: Body weight changes were measured before, at 4-hour intervals during, and immediately after the 12- and 24-hour races. RESULTS: Significant overall decreases in body weight were apparent at the conclusion of both races. The mean relative body weight change after the 12-hour race was -2.89 ± 1.56%, ranging from 0 to 6.5%. The mean relative body weight change after the 24-hour race was -5.05 ± 2.28%, ranging from -0.77% to -11.40%. Of runners in the 24-hour race, 26% lost greater than 7% of baseline body weight during the race. During both the 12- and 24-hour races, the greatest weight change (decrease) occurred during the first 4 hours. Weight remained relatively stable after 8 hours, although a further decrease was apparent between 16 and 20 hours in the 24-hour participants. Weight change had no bearing on performance in the 12-hour race, whereas weight loss was positively associated with performance in the 24-hour race. CONCLUSIONS: Our findings demonstrate that the majority of weight decrease/dehydration in both the 12- and 24-hour races occurred during the first 8 hours. Hence, to maintain body weight, fluid intake should be optimized in the first 8 hours for both 12- and 24-hour runners and in 16 to 20 hours for 24-hour marathon runners.

Original languageEnglish
Pages (from-to)155-158
Number of pages4
JournalClinical Journal of Sport Medicine
Volume18
Issue number2
DOIs
Publication statusPublished - Mar 2008
Externally publishedYes

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Athletic Performance
Weights and Measures
Body Weight Changes
Body Weight
Body Fluids
Dehydration
Athletes
Weight Loss
Prospective Studies

Keywords

  • Athletic performance
  • Body weight
  • Dehydration
  • Endurance
  • Ultra-marathon

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

Kao, W. F., Shyu, C. L., Yang, X. W., Hsu, T. F., Chen, J. J., Kao, W. C., ... Lee, C. H. (2008). Athletic performance and serial weight changes during 12- and 24-hour ultra-marathons. Clinical Journal of Sport Medicine, 18(2), 155-158. https://doi.org/10.1097/JSM.0b013e31815cdd37

Athletic performance and serial weight changes during 12- and 24-hour ultra-marathons. / Kao, Wei Fong; Shyu, Chih Ling; Yang, Xiu Wu; Hsu, Teh Fu; Chen, Jin Jong; Kao, Wei Chun; Polun-Chang, [No Value]; Huang, Yi Jen; Kuo, Fon Chu; Huang, Chun I.; Lee, Chen Hsen.

In: Clinical Journal of Sport Medicine, Vol. 18, No. 2, 03.2008, p. 155-158.

Research output: Contribution to journalArticle

Kao, WF, Shyu, CL, Yang, XW, Hsu, TF, Chen, JJ, Kao, WC, Polun-Chang, NV, Huang, YJ, Kuo, FC, Huang, CI & Lee, CH 2008, 'Athletic performance and serial weight changes during 12- and 24-hour ultra-marathons', Clinical Journal of Sport Medicine, vol. 18, no. 2, pp. 155-158. https://doi.org/10.1097/JSM.0b013e31815cdd37
Kao, Wei Fong ; Shyu, Chih Ling ; Yang, Xiu Wu ; Hsu, Teh Fu ; Chen, Jin Jong ; Kao, Wei Chun ; Polun-Chang, [No Value] ; Huang, Yi Jen ; Kuo, Fon Chu ; Huang, Chun I. ; Lee, Chen Hsen. / Athletic performance and serial weight changes during 12- and 24-hour ultra-marathons. In: Clinical Journal of Sport Medicine. 2008 ; Vol. 18, No. 2. pp. 155-158.
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AU - Kao, Wei Chun

AU - Polun-Chang, [No Value]

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KW - Endurance

KW - Ultra-marathon

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