The effect of astaxanthin supplementation on performance and fat oxidation during a 40 km cycling time trial

Brown, Daniel R. and Warner, Ashley R. and Deb, Sanjoy K. and Gough, Lewis A and Sparks, S. Andy and McNaughton, Lars R. (2020) The effect of astaxanthin supplementation on performance and fat oxidation during a 40 km cycling time trial. Journal of Science and Medicine in Sport. ISSN 1440-2440

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Abstract

Objectives
This study aimed to investigate whether supplementation with 12 mg⋅day−1 astaxanthin for 7 days can improve exercise performance and metabolism during a 40 km cycling time trial.

Design
A randomised, double-blind, crossover design was employed.

Methods
Twelve recreationally trained male cyclists (VO2peak: 56.5 ± 5.5 mL⋅ kg−1⋅ min−1, Wmax: 346.8 ± 38.4 W) were recruited. Prior to each experimental trial, participants were supplemented with either 12 mg⋅day−1 astaxanthin or an appearance-matched placebo for 7 days (separated by 14 days of washout). On day 7 of supplementation, participants completed a 40 km cycling time trial on a cycle ergometer, with indices of exercise metabolism measured throughout.

Results
Time to complete the 40 km cycling time trial was improved by 1.2 ± 1.7% following astaxanthin supplementation, from 70.76 ± 3.93 min in the placebo condition to 69.90 ± 3.78 min in the astaxanthin condition (mean improvement = 51 ± 71 s, p = 0.029, g = 0.21). Whole-body fat oxidation rates were also greater (+0.09 ± 0.13 g min−1, p = 0.044, g = 0.52), and the respiratory exchange ratio lower (-0.03 ± 0.04, p = 0.024, g = 0.60) between 39–40 km in the astaxanthin condition.

Conclusions
Supplementation with 12 mg day−1 astaxanthin for 7 days provided an ergogenic benefit to 40 km cycling time trial performance in recreationally trained male cyclists and enhanced whole-body fat oxidation rates in the final stages of this endurance-type performance event.

Item Type: Article
Additional Information: ** Article version: AM ** Embargo end date: 31-12-9999 ** From Elsevier via Jisc Publications Router ** History: accepted 28-06-2020; issue date 03-07-2020. ** Licence for AM version of this article: This article is under embargo with an end date yet to be finalised.
Identification Number: https://doi.org/10.1016/j.jsams.2020.06.017
Date: 3 July 2020
Uncontrolled Keywords: antioxidants, dietary supplements, substrate utilisation, sports performance, sports, nurtition
Subjects: B400 Nutrition
C600 Sports Science
Divisions: Faculty of Health, Education and Life Sciences > School of Health Sciences
REF UoA Output Collections > REF2021 UoA 03: Allied Health Professions, Dentistry, Nursing & Pharmacy
SWORD Depositor: JISC PubRouter
Depositing User: JISC PubRouter
Date Deposited: 06 Jul 2020 15:00
Last Modified: 05 Aug 2020 12:21
URI: http://www.open-access.bcu.ac.uk/id/eprint/9428

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