Glucose turn point as a marker of exercise intensity in elite swimmers

Swanwick, E and Matthews, MJ 2017, 'Glucose turn point as a marker of exercise intensity in elite swimmers' , International Journal of Sports Exercise Medecine, 3 (4) .

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Abstract

Purpose: To investigate a blood glucose profile and turn point during incremental exercise. Methods: Thirty-three national and international-level swimmers undertook a 7 × 200 m discontinuous, incremental, training set on a six-minute turnaround. Subjects were asked to be two hours post-absorptive, which resulted in a mean blood glucose level of 5.5 ± 0.57 mmol/l. After each 200 m-swim blood lactate, blood glucose, and heart rate were taken and values plotted against the velocity of each swim. A Glucose turn point (Gt) was observed and defined in this study as an upward deflection after which blood glucose continues to rise. The Dmax, Borch, and LogLog methods were used to calculate Anaerobic Threshold (AnT). Results: Significant differences were observed between Gt and all three methods of AnT for swim pace, heart rate, blood glucose, and lactate (P < 0.005). Conclusions: Blood glucose profiles and the identification of Gt are not linked to AnT. Gt may be an effective tool for the observation of exercise intensity that is independent of the mechanisms underlying AnT.

Item Type: Article
Schools: Schools > School of Health Sciences > Centre for Health Sciences Research
Journal or Publication Title: International Journal of Sports Exercise Medecine
Publisher: ClinMed International Library
ISSN: 2469-5718
Related URLs:
Depositing User: A Johnson
Date Deposited: 19 Sep 2017 09:16
Last Modified: 10 Oct 2017 07:46
URI: http://usir.salford.ac.uk/id/eprint/43802

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