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- W2055099310 abstract "Purpose: The purpose of this study was to describe the progression from acute fatigue following a single bout of exercise to the chronic fatigue evident during overreaching and to detect early markers of this condition. Methods: The training of 8 endurance cyclists was systematically controlled and monitored for 6 weeks: 2wk of normal (N), 2wk of intensified (ITP) and 2wk of recovery training. On 20 days during this period, performance was assessed in the laboratory using three different tests (a 40km time trial, a high intensity exercise test and a VO2max test). Before and during all trials, blood and saliva samples were collected and two questionnaires were completed daily (POMS and DALDA). Results: A significant decline in maximal power output at the end of the VO2max test (N = 338 ± 17W, ITP = 319 ± 17W) and time trial performance (N= 59.4 ± 1.9min, ITP= 65.3 ± 2.6min) occurred during ITP in conjunction with a 29% increase in global mood scores. Decreased performance coincided with a 9.3% reduction in maximal heart rate (HRmax) and maximal plasma lactate (14%) and an 8.6% increase in perception of effort at a submaximal workload ([email protected]). The ratio of plasma glutamine/glutamate significantly declined, while no changes were observed in plasma TNF-a, IL-6, glutamine, salivary IgA and haematological measures. Despite the dramatically decreased performance and increased RPE, no changes were observed in substrate utilisation, cycling efficiency, resting plasma urea, ammonia or catecholamine concentration. Conclusion: Fatigue was apparent initially after the onset of ITP. However, during the first days of ITP there were minimal changes in physiological and psychological responses and overreaching was not evident until Day 7 of ITP. There was no single consistent marker of overreaching but principal indicators were reduced HRmax and lactate and an elevated submaximal RPE." @default.
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- W2055099310 date "2002-05-01" @default.
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- W2055099310 title "TIME COURSE OF PERFORMANCE CHANGES AND MARKERS OF OVERREACHING IN CYCLISTS" @default.
- W2055099310 doi "https://doi.org/10.1097/00005768-200205001-01536" @default.
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