Fatigue index and fatigue rate during an anaerobic performance under hypohydrations
Naharudin MN, Yusof A
PloS one · 17 citations
How it was studied
- Design
- Randomized controlled trial (classified by our AI screen)
- Studied in
- People
- Main outcome
- Health markers and function
Who paid for it
- Funding
- Independent funding
- University or hospital
- Universiti Malaya
Based on 1 listed funder(s) and full-text disclosure statement.
Publication
- Published
- 2013-10-30 · PLoS One · vol. 8 · issue 10 · p. e77290
- Publisher
- Public Library of Science
- Cited
- 30 citations · more than 71% of similar papers · 0.7× the field average
- References
- 30 works
- Access
- Open access (journal) · CC-BY
- Research areas
- Thermoregulation and physiological responses · Muscle metabolism and nutrition · Sports Performance and Training
- Keywords
- Anaerobic exercise, Wingate test, Rating of perceived exertion, Medicine, Animal science, Mathematics, Physical therapy, Internal medicine, Heart rate, Biology, Blood pressure
- MeSH
- humans, dehydration, fatigue, exercise test, oxygen consumption, physical endurance, bicycling, male, physical exertion, young adult
2 authors
From MY
- Mohamed Nashrudin Naharudin · correspondingUniversity Malaya Medical Centre; University of Malaya
- Ashril YusofUniversity Malaya Medical Centre; University of Malaya
Abstract
Background
Since hypohydration commonly occurs in sports, studies on anaerobic exercise performance under this condition have been extensively carried out. When describing anaerobic performance, authors usually refer to a drop in anaerobic performance as fatigue index (FI) which is conventionally calculated using peak and low power data points. Meanwhile, another possible method in explaining anaerobic fatigue is using the rate constant which is derived from the exponential decline of power output known as fatigue rate (FR). Few studies have demonstrated that there was no change in anaerobic performance under mild hypohydrations.
Purpose
This study aimed to compare the kinetics of power output using FI and FR of an anaerobic performance (Wingate test) under 2, 3 and 4% state of hypohydrations.
Method
Thirty two collegiate cyclists (age = 22 ± 2 years; body weight = 71.45 ± 3.43 kg; height = 173.23 ± 0.04 cm) were matched using their baseline anaerobic peak power (APP) then randomly divided into 4 groups of EU (euhydrated), 2H, 3H and 4H respectively.
Results
As expected the, FI, APP, anaerobic lower power (ALP) and rating of perceived exertion (RPE) did not show significant differences between and within the groups. However, the FR in 3H (0.018 ± 0.005 s(-1)) and 4H (0.019 ± 0.010 s(-1)) were significantly lower than EU (0.033 ± 0.012 s(-1)). Post-test FR also showed significant reduction in 3H and 4H compared to their pre-test values (p<0.05).
Conclusion
Despite the lack of changes in APP and RPE, subjects in 3H and 4H showed evidence of lower reduction of power output over time. The findings support earlier reports which showed no change in anaerobic performance under mild hypohydrations. The relatively lower FR suggests higher drive in maintaining power output under hypohydrations of 3 and 4% body weight.
Abstract via Europe PMC. Copyright remains with the authors or publisher (CC BY).
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