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Sports Medicine

, Volume 36, Issue 8, pp 705–722 | Cite as

The Role of Information Processing Between the Brain and Peripheral Physiological Systems in Pacing and Perception of Effort

  • Alan Clair St Gibson
  • Estelle V. Lambert
  • Laurie H. G. Rauch
  • Ross Tucker
  • Denise A. Baden
  • Carl Foster
  • Timothy D. Noakes
Review Article

Abstract

This article examines how pacing strategies during exercise are controlled by information processing between the brain and peripheral physiological systems. It is suggested that, although several different pacing strategies can be used by athletes for events of different distance or duration, the underlying principle of how these different overall pacing strategies are controlled is similar. Perhaps the most important factor allowing the establishment of a pacing strategy is knowledge of the endpoint of a particular event. The brain centre controlling pace incorporates knowledge of the endpoint into an algorithm, together with memory of prior events of similar distance or duration, and knowledge of external (environmental) and internal (metabolic) conditions to set a particular optimal pacing strategy for a particular exercise bout. It is proposed that an internal clock, which appears to use scalar rather than absolute time scales, is used by the brain to generate knowledge of the duration or distance still to be covered, so that power output and metabolic rate can be altered appropriately throughout an event of a particular duration or distance. Although the initial pace is set at the beginning of an event in a feedforward manner, no event or internal physiological state will be identical to what has occurred previously. Therefore, continuous adjustments to the power output in the context of the overall pacing strategy occur throughout the exercise bout using feedback information from internal and external receptors. These continuous adjustments in power output require a specific length of time for afferent information to be assessed by the brain’s pace control algorithm, and for efferent neural commands to be generated, and we suggest that it is this time lag that crates the fluctuations in power output that occur during an exercise bout. These non-monotonic changes in power output during exercise, associated with information processing between the brain and peripheral physiological systems, are crucial to maintain the overall pacing strategy chosen by the brain algorithm of each athlete at the start of the exercise bout.

Keywords

Power Output Exercise Bout Internal Clock Pace Strategy Quantal Unit 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

Funding for the work described in this review was provided by Medical Research Council of South Africa, the University of Cape Town Harry Crossley and Nellie Atkinson Staff Research Funds, Discovery Health, and the National Research Foundation of South Africa through the THRIP initiative. To the knowledge of the authors, there are no conflicts of interest that are directly or indirectly related to the contents of this manuscript.

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Copyright information

© Adis Data Information BV 2006

Authors and Affiliations

  • Alan Clair St Gibson
    • 1
    • 2
  • Estelle V. Lambert
    • 1
  • Laurie H. G. Rauch
    • 1
  • Ross Tucker
    • 1
  • Denise A. Baden
    • 3
  • Carl Foster
    • 4
  • Timothy D. Noakes
    • 1
  1. 1.Brain Sciences Research Group, MRC/UCT Research Unit of Exercise Science and Sports MedicineUniversity of Cape TownCape TownSouth Africa
  2. 2.MRC/UCT Medical Imaging Research Unit, Department of Human BiologyUniversity of Cape TownCape TownSouth Africa
  3. 3.Department of PsychologyUniversity of SouthamptonSouthamptonUK
  4. 4.Department of Exercise and Sport ScienceUniversity of WisconsinLa CrosseUSA

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