2017 AJHB Short-term resource allocation during strenuous and prolonged athletic competition.pdf (772.86 kB)
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Short-term resource allocation during extensive athletic competition

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posted on 06.02.2020 by Daniel Longman, Sean P Prall, Eric C Shattuck, Ian D Stephen, Jay T Stock, Jonathan CK Wells, Michael P Muehlenbein
© 2017 The Authors. American Journal of Human Biology Published by Wiley Periodicals, Inc. 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.

History

School

  • Sport, Exercise and Health Sciences

Published in

American Journal of Human Biology

Volume

30

Issue

1

Publisher

Wiley

Version

VoR (Version of Record)

Rights holder

© the Authors

Publisher statement

This is an Open Access Article. It is published by Wiley under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/

Acceptance date

31/07/2017

Publication date

2017-10-10

Copyright date

2017

ISSN

1042-0533

eISSN

1520-6300

Language

en

Depositor

Dr Daniel Longman. Deposit date: 6 February 2020

Article number

e23052

Licence

Exports