Intake duration of anthocyanin-rich New Zealand blackcurrant extract affects cardiovascular responses during moderate-intensity walking but not at rest

Sahin, Akif, Bilgic, Pelin, Montanari, Stefano and Willems, Mark E. T. (2021) Intake duration of anthocyanin-rich New Zealand blackcurrant extract affects cardiovascular responses during moderate-intensity walking but not at rest. Journal of Dietary Supplements. ISSN 1939-0211 (In Press)

[img] Text
Sahin duration effects cardiovascular JDS accepted version 2021.pdf - Accepted Version
Restricted to Repository staff only until 2 November 2022.
Available under License Creative Commons Attribution.

Download (663kB) | Request a copy

Abstract

We examined effects of intake duration of New Zealand blackcurrant (NZBC) extract on cardiovascular responses during supine rest and moderate-intensity walking. Recreationally active men (n=15, age: 24±6 yr, BMI: 24.7±4.3 kg·m-2) volunteered in a randomized, cross-over design. One metabolic equivalent (1-MET) was measured (3.97±0.66 mL·kg-1·min-1) and an incremental walking test was performed to individualize speed at 4 (n=3) or 5 (n=12) METs for the 30-min walk (5.7±0.7 km·hr-1). NZBC extract (210 mg of anthocyanins) was taken with breakfast for 7 and 14 days, with a 14-days washout. The final dose was ingested 2-hr before recording of the cardiovascular responses (Portapres Model-2). At rest, %changes at 7- and 14-days intake were observed for stroke volume (+6.8% (trend), p=0.065; +8.5%, p=0.012), cardiac output (+10.1%, p=0.007; +8.5%, p=0.013), total peripheral resistance (-12.0%, p=0.004; -13.1%, p=0.011), diastolic (-5.7%, p=0.045; -9.7%, p=0.015) and mean arterial pressure (-4.4%, p=0.040; -7.2%, p=0.029), but without intake duration effect. During walking, %changes at 7- and 14-days intake were observed for stroke volume (+7.7% (trend), p=0.063; +9.9%, p=0.006), cardiac output (+8.7%, p=0.037; +10.1%, p=0.007), diastolic blood pressure (-6.2%, p=0.042; -10.6%, p=0.001), and total peripheral resistance (-9.6%, p=0.042; -13.5%, p=0.005) but without intake duration effect. During walking, %changes at 14-days were observed only for mean arterial pressure (-6.4%, p=0.018) and arterio-venous oxygen difference (-7.9%, p=0.019). NZBC extract affects cardiovascular responses at rest and during moderate-intensity exercise with 7- and 14-day intake. Only during moderate-intensity exercise, a longer intake of NZBC extract was required for an effect on some cardiovascular responses.

Item Type: Article
Uncontrolled Keywords: Blackcurrant, blood pressure, cardiovascular responses, blood flow, anthocyanin, flavonoid, polyphenols, exercise.
Subjects: Q Science > QP Physiology
R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Departments > Sport and Exercise Sciences
Depositing User: Mark Willems
Date Deposited: 11 Nov 2021 10:07
Last Modified: 11 Nov 2021 10:07
URI: http://eprints.chi.ac.uk/id/eprint/6050

Actions (login required)

View Item View Item