Key result
A 24h ultra-endurance swimming event significantly increased blood lactate and perceived exertion, and decreased cortical arousal, without affecting average swimming velocity.
Why the study?
Ultra-endurance events induce acute marked physiological adaptations, but no studies had investigated these responses during swimming events.
What is the psychophysiological response (rate of perceived exertion, blood lactate, swimming time, cortical arousal) of swimmers during a 24h ultra-endurance swimming event?
Observational (n=19)
What is the psychophysiological response (rate of perceived exertion, blood lactate, swimming time, cortical arousal) of swimmers during a 24h ultra-endurance swimming event?
Answers are grounded in this paper and cite their sources.
A 24-hour ultra-endurance swimming event induces significant psychophysiological stress, including increased lactate and perceived exertion, and decreased cortical arousal, while maintaining swimming performance.
BACKGROUND: Ultra-endurance events under critical environmental conditions represent unique stress, resulting in acute marked adaptations to the cardiovascular, respiratory, metabolic and neuromuscular systems of the organism. In line with this, no studies in swimming events were found thus far. METHODS: This research aimed to analyze the psychophysiological response of swimmers in an ultra-endurance swimming event. Changes in the rate of perceived exertion, blood lactate concentration, 1000m swimming time and cortical arousal were measured in 19 male volunteer swimmers (28.0±5.6 years; 175.0±7.9 cm; 70.1±7.8 kg) in 3 moments during a 24h swimming event. RESULTS: We found a significant increase in lactate concentration after series 1, decreasing the values in series 2 and series 3. Cortical arousal decreased significantly in series 3 respect the basal sample. Rate of perceived exertion significantly increased in the swimming ultra-endurance event and 1000m swimming time was maintained during the series analyzed. CONCLUSIONS: An ultra-endurance swimming event produced an increase in blood lactate concentration and rated of perceived exertion and a decrease in cortical arousal, not affecting average swimming velocity along the event.
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Sánchez-Molina et al. (2020) conducted an observational in Healthy volunteers (n=19). Ultra-endurance swimming event vs. Baseline was evaluated on Changes in rate of perceived exertion, blood lactate concentration, 1000m swimming time and cortical arousal. A 24h ultra-endurance swimming event significantly increased blood lactate and perceived exertion, and decreased cortical arousal, without affecting average swimming velocity.
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