Intake duration of anthocyanin-rich New Zealand blackcurrant extract affects metabolic responses during moderate intensity walking exercise in adult males

Sahin, Akif, Bilgic, Pelin, Montanari, Stefano and Willems, Mark E. T. (2020) Intake duration of anthocyanin-rich New Zealand blackcurrant extract affects metabolic responses during moderate intensity walking exercise in adult males. Journal of Dietary Supplements. ISSN 1939-0211

[img] Text (This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Dietary Supplements on 24/06/2020 available online: http://www.tandfonline.com/10.1080/19390211.2020.1783421)
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Abstract

We examined effects of intake duration of anthocyanin-rich New Zealand blackcurrant (NZBC) extract on physiological and metabolic responses during moderate intensity walking. Healthy men (n=16, age: 24±6 years, body mass: 78±16 kg, BMI: 24.7±4.1 kg·m-2, body fat: 15±5%) volunteered. One metabolic equivalent (1-MET: 3.95±0.64 ml·kg-1·min-1) was measured during supine rest. Responses during the 30-min walk (n=3: 4-MET; n=13: 5-MET) (speed: 5.7±0.7 km·hr-1) were measured at 7-10, 17-20 and 27-30 min and averaged over the time periods. For intake conditions (7-days and 14-days), 2 capsules of NZBC extract (600 mg containing 210 mg of anthocyanins) were taken with breakfast (14-day washout). The final 2 capsules were ingested 2-hr before the morning walk. Intake duration of NZBC extract had no effect on heart rate, minute ventilation, oxygen uptake, and carbon dioxide production. Fat oxidation was enhanced with 7- and 14-day intake by 11±19% and 17±26% (baseline: 0.36±0.12, 7-day: 0.39±0.13, 14-day: 0.41±0.13 g·min-1, p=0.007). Only 14-day intake lowered RER (baseline: 0.852±0.046, 7-day: 0.843±0.045, 14-day: 0.837±0.037, p=0.019) and carbohydrate oxidation (baseline: 0.95±0.40, 7-day: 0.91±0.40, 14-day: 0.86±0.33 g·min-1, p=0.032). Rating of perceived exertion was lower with 7-day and 14-day intake (baseline: 11.0±2.3, 7-day: 10.5±1.8, 14-day: 10.3±2.1, p=0.002). Longer intake duration (i.e. 14 days) of New Zealand blackcurrant extract seems to enhance fat oxidation more during a 30-min moderate intensity walk than 7 days intake. The intake duration of anthocyanin-rich New Zealand blackcurrant extract may be due to an enhanced bioavailability of anthocyanin-derived metabolites that alter the mechanisms for substrate oxidation during moderate intensity exercise.

Item Type: Article
Uncontrolled Keywords: brisk walking; exercise-induced fat oxidation; respiratory exchange ratio; anthocyanins; metabolic equivalent
Subjects: Q Science > QP Physiology
Divisions: Departments > Sport and Exercise Sciences
Depositing User: Mark Willems
Date Deposited: 09 Jun 2020 08:37
Last Modified: 07 Aug 2020 10:39
URI: http://eprints.chi.ac.uk/id/eprint/5207

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