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Short‐term resource allocation during extensive athletic competition

OBJECTIVES: Following predictions from life history theory, we sought to identify acute trade‐offs between reproductive effort (as measured by psychological arousal) and somatic maintenance (via functional measures of innate immunity) during conditions of severe energetic imbalance. METHODS: Sixty‐s...

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Autores principales: Longman, Daniel P., Prall, Sean P., Shattuck, Eric C., Stephen, Ian D., Stock, Jay T., Wells, Jonathan C. K., Muehlenbein, Michael P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5846891/
https://www.ncbi.nlm.nih.gov/pubmed/28994489
http://dx.doi.org/10.1002/ajhb.23052
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author Longman, Daniel P.
Prall, Sean P.
Shattuck, Eric C.
Stephen, Ian D.
Stock, Jay T.
Wells, Jonathan C. K.
Muehlenbein, Michael P.
author_facet Longman, Daniel P.
Prall, Sean P.
Shattuck, Eric C.
Stephen, Ian D.
Stock, Jay T.
Wells, Jonathan C. K.
Muehlenbein, Michael P.
author_sort Longman, Daniel P.
collection PubMed
description OBJECTIVES: Following predictions from life history theory, we sought to identify acute trade‐offs between reproductive effort (as measured by psychological arousal) and somatic maintenance (via functional measures of innate immunity) during conditions of severe energetic imbalance. METHODS: Sixty‐six male ultramarathon runners (ages 20 to 37 years) were sampled before and after a lengthy race. Saliva and sera were collected for testosterone and immunological analyses (hemolytic complement activity and bacterial killing ability). Lean body mass was assessed by bioelectrical impedance, and libido was measured using a slideshow of arousing and neutral images. RESULTS: Following predictions, there was a significant decrease in salivary testosterone levels (109.59 pg/mL versus 97.61 pg/mL, P < .001) and arousal scores in response to provocative images (5.40 versus 4.89, P = .001) between prerace and postrace time points. Additionally, participant bacterial killing ability (P = .035) and hemolytic complement activity (P = .021) increased between prerace and postrace. CONCLUSIONS: Decreased libido and testosterone with concomitant heightened innate immune responses suggest a shift in energetic priorities away from reproduction and toward maintenance/defense during a period of energetic stress.
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spelling pubmed-58468912018-03-20 Short‐term resource allocation during extensive athletic competition Longman, Daniel P. Prall, Sean P. Shattuck, Eric C. Stephen, Ian D. Stock, Jay T. Wells, Jonathan C. K. Muehlenbein, Michael P. Am J Hum Biol Original Research Articles OBJECTIVES: Following predictions from life history theory, we sought to identify acute trade‐offs between reproductive effort (as measured by psychological arousal) and somatic maintenance (via functional measures of innate immunity) during conditions of severe energetic imbalance. METHODS: Sixty‐six male ultramarathon runners (ages 20 to 37 years) were sampled before and after a lengthy race. Saliva and sera were collected for testosterone and immunological analyses (hemolytic complement activity and bacterial killing ability). Lean body mass was assessed by bioelectrical impedance, and libido was measured using a slideshow of arousing and neutral images. RESULTS: Following predictions, there was a significant decrease in salivary testosterone levels (109.59 pg/mL versus 97.61 pg/mL, P < .001) and arousal scores in response to provocative images (5.40 versus 4.89, P = .001) between prerace and postrace time points. Additionally, participant bacterial killing ability (P = .035) and hemolytic complement activity (P = .021) increased between prerace and postrace. CONCLUSIONS: Decreased libido and testosterone with concomitant heightened innate immune responses suggest a shift in energetic priorities away from reproduction and toward maintenance/defense during a period of energetic stress. John Wiley and Sons Inc. 2017-10-10 2018 /pmc/articles/PMC5846891/ /pubmed/28994489 http://dx.doi.org/10.1002/ajhb.23052 Text en © 2017 The Authors. American Journal of Human Biology Published by Wiley Periodicals, Inc. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research Articles
Longman, Daniel P.
Prall, Sean P.
Shattuck, Eric C.
Stephen, Ian D.
Stock, Jay T.
Wells, Jonathan C. K.
Muehlenbein, Michael P.
Short‐term resource allocation during extensive athletic competition
title Short‐term resource allocation during extensive athletic competition
title_full Short‐term resource allocation during extensive athletic competition
title_fullStr Short‐term resource allocation during extensive athletic competition
title_full_unstemmed Short‐term resource allocation during extensive athletic competition
title_short Short‐term resource allocation during extensive athletic competition
title_sort short‐term resource allocation during extensive athletic competition
topic Original Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5846891/
https://www.ncbi.nlm.nih.gov/pubmed/28994489
http://dx.doi.org/10.1002/ajhb.23052
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