2017 Sci Rep A trade-off between cognitive and physical performance, with relative preservation of brain function.pdf (1.02 MB)

A trade-off between cognitive and physical performance, with relative preservation of brain function

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journal contribution
posted on 06.02.2020, 14:14 by Daniel Longman, Jay T Stock, Jonathan CK Wells
Debate surrounds the issue of how the large, metabolically expensive brains of Homo sapiens can be energetically afforded. At the evolutionary level, decreased investment in muscularity, adiposity and the digestive tract allow for a larger brain. Developmentally, high neo-natal adiposity and preferential distribution of resources to the brain provide an energetic buffer during times of environmental stress. Through an experimental design, we investigated the hypothesis of a trade-off involving brain and muscle at the acute level in humans. Mental performance was measured by a free-recall test, and physical performance by power output on an indoor rowing ergometer. Sixty-two male student rowers performed the two tests in isolation, and then again simultaneously. Paired samples t-tests revealed that both power output and mental performance reduced when tested together compared to in isolation (t(61) = 9.699, p < 0.001 and t(61) = 8.975, p < 0.001). Furthermore, the decrease in physical performance was greater than the decrease in mental performance (t(61) = -2.069, p = 0.043). This is the first investigation to demonstrate an acute level trade-off between these two functions, and provides support for the selfish brain hypothesis due to the relative preservation of cognitive function over physical power output. The underlying mechanism is unclear, and requires further work.

History

School

  • Sport, Exercise and Health Sciences

Published in

Scientific Reports

Volume

7

Issue

1

Publisher

Springer Science and Business Media LLC

Version

VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an Open Access Article. It is published by Springer 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

19/09/2017

Publication date

2017-10-20

Copyright date

2017

ISSN

2045-2322

eISSN

2045-2322

Language

en

Location

England

Depositor

Dr Daniel Longman . Deposit date: 6 February 2020

Article number

13709

Licence

Exports