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      Using Field Based Data to Model Sprint Track Cycling Performance

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          Abstract

          Cycling performance models are used to study rider and sport characteristics to better understand performance determinants and optimise competition outcomes. Performance requirements cover the demands of competition a cyclist may encounter, whilst rider attributes are physical, technical and psychological characteristics contributing to performance. Several current models of endurance-cycling enhance understanding of performance in road cycling and track endurance, relying on a supply and demand perspective. However, they have yet to be developed for sprint-cycling, with current athlete preparation, instead relying on measures of peak-power, speed and strength to assess performance and guide training. Peak-power models do not adequately explain the demands of actual competition in events over 15-60 s, let alone, in World-Championship sprint cycling events comprising several rounds to medal finals. Whilst there are no descriptive studies of track-sprint cycling events, we present data from physiological interventions using track cycling and repeated sprint exercise research in multiple sports, to elucidate the demands of performance requiring several maximal sprints over a competition. This review will show physiological and power meter data, illustrating the role of all energy pathways in sprint performance. This understanding highlights the need to focus on the capacity required for a given race and over an event, and therefore the recovery needed for each subsequent race, within and between races, and how optimal pacing can be used to enhance performance. We propose a shift in sprint-cyclist preparation away from training just for peak power, to a more comprehensive model of the actual event demands.

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          Most cited references118

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          The Wingate anaerobic test. An update on methodology, reliability and validity.

          O. Bar-Or (1987)
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            Physiological and metabolic responses of repeated-sprint activities:specific to field-based team sports.

            Field-based team sports, such as soccer, rugby and hockey are popular worldwide. There have been many studies that have investigated the physiology of these sports, especially soccer. However, some fitness components of these field-based team sports are poorly understood. In particular, repeated-sprint ability (RSA) is one area that has received relatively little research attention until recent times. Historically, it has been difficult to investigate the nature of RSA, because of the unpredictability of player movements performed during field-based team sports. However, with improvements in technology, time-motion analysis has allowed researchers to document the detailed movement patterns of team-sport athletes. Studies that have published time-motion analysis during competition, in general, have reported the mean distance and duration of sprints during field-based team sports to be between 10-20 m and 2-3 seconds, respectively. Unfortunately, the vast majority of these studies have not reported the specific movement patterns of RSA, which is proposed as an important fitness component of team sports. Furthermore, there have been few studies that have investigated the physiological requirements of one-off, short-duration sprinting and repeated sprints (<10 seconds duration) that is specific to field-based team sports. This review examines the limited data concerning the metabolic changes occurring during this type of exercise, such as energy system contribution, adenosine triphosphate depletion and resynthesis, phosphocreatine degradation and resynthesis, glycolysis and glycogenolysis, and purine nucleotide loss. Assessment of RSA, as a training and research tool, is also discussed.
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              Recovery of power output and muscle metabolites following 30 s of maximal sprint cycling in man.

              1. The recovery of power output and muscle metabolites was examined following maximal sprint cycling exercise. Fourteen male subjects performed two 30 s cycle ergometer sprints separated by 1.5, 3 and 6 min of recovery, on three separate occasions. On a fourth occasion eight of the subjects performed only one 30 s sprint and muscle biopsies were obtained during recovery. 2. At the end of the 30 s sprint phosphocreatine (PCr) and ATP contents were 19.7 +/- 1.2 and 70.5 +/- 6.5% of the resting values (rest), respectively, while muscle lactate was 119.0 +/- 4.6 mmol (kg dry wt)-1 and muscle pH was 6.72 +/- 0.06. During recovery, PCr increased rapidly to 65.0 +/- 2.8% of rest after 1.5 min, but reached only 85.5 +/- 3.5% of rest after 6 min of recovery. At the same time ATP and muscle pH remained low (19.5 +/- 0.9 mmol (kg dry wt)-1 and 6.79 +/- 0.02, respectively). Modelling of the individual PCr resynthesis using a power function curve gave an average half-time for PCr resynthesis of 56.6 +/- 7.3 s. 3. Recovery of peak power output (PPO), peak pedal speed (maxSp) and mean power during the initial 6 s (MPO6) of sprint 2 did not reach the control values after 6 min of rest, and occurred in parallel with the resynthesis of PCr, despite the low muscle pH. High correlations (r = 0.71-0.86; P 0.05). 4. These data suggest that PCr resynthesis after 30 s of maximal sprint exercise is slower than previously observed after dynamic exercise of longer duration, and PCr resynthesis is important for the recovery of power during repeated bouts of sprint exercise.
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                Author and article information

                Contributors
                hamish.ferguson@pg.canterbury.ac.nz
                crharnish@marybaldwin.edu
                geoff.chase@canterbury.ac.nz
                Journal
                Sports Med Open
                Sports Med Open
                Sports Medicine - Open
                Springer International Publishing (Cham )
                2199-1170
                2198-9761
                16 March 2021
                16 March 2021
                December 2021
                : 7
                : 20
                Affiliations
                [1 ]GRID grid.21006.35, ISNI 0000 0001 2179 4063, Centre for Bioengineering, Department of Mechanical Engineering, , University of Canterbury, ; Private Bag 4800, Christchurch, 8140 New Zealand
                [2 ]GRID grid.419456.b, ISNI 0000 0001 0157 9761, Department of Exercise Science, College of Health, , Mary Baldwin University, ; Staunton, VA USA
                Author information
                http://orcid.org/0000-0002-3773-5241
                https://orcid.org/0000-0003-1089-8136
                https://orcid.org/0000-0001-9989-4849
                Article
                310
                10.1186/s40798-021-00310-0
                7966696
                33725208
                e32b6c3d-07ba-4b5f-9bfc-586e250134ff
                © The Author(s) 2021

                Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

                History
                : 23 August 2020
                : 28 February 2021
                Categories
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                © The Author(s) 2021

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