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Effect of New Zealand Sujon blackcurrant on resting cardiovascular function in triathletes
Journal of the International Society of Sports Nutrition volume 11, Article number: P3 (2014)
Blackcurrant contains anthocyanin, a component known to induce vasorelaxation and vasodilation in rat aortic rings . In humans, blackcurrant intake has been reported to increase peripheral blood flow , with higher anthocyanin intake having beneficial effects on cardiovascular function in women . However, the effect of blackcurrant intake on cardiovascular function in endurance-trained athletes is unknown. We examined the effect of 1-week Sujon blackcurrant powder supplementation on resting cardiovascular function of trained triathletes.
Thirteen healthy triathletes with >3 years experience (8 men; mean±SD: age: 38±8 years, height: 174±5 cm, body mass: 71±9 kg, BMI: 23±2, BF%: 19±5%, VO2max: 49.1±6.2 mL kg-1 min-1, maximum power: 305±68 W) volunteered. Participants were tested following 7 days of Sujon blackcurrant powder (S, 6g/day) or placebo (P) intake, administered following a double-blind, crossover, randomized design with a wash-out period of 4 weeks. Cardiovascular function was recorded for 20 min in supine participants using a beat-to-beat blood pressure monitoring system (Portapres® Model 2, Finapres Medical Systems BV, Amsterdam, The Netherlands). Cardiovascular measures were averaged over 10 consecutive beats, with the lowest systolic blood pressure (BP) and associated measures analysed. Paired two-tailed t-tests were used for analysis with significance accepted at p≤.05. Consent to publish the results was obtained from all participants.
There were no differences in systolic BP (P: 121±23, S: 120±23 mmHg, p=.92), diastolic BP (P: 69±16, S: 63±14 mmHg, p=.12), mean arterial BP (P: 86±18, S: 82±18 mmHg, p=.33), and heart rate (P: 58±9, S: 59±10 beats min-1, p=.95). Stroke volume (P: 82±23, S: 99±25 mL, p<.01) and cardiac output (P: 4.8±1.6, S: 5.8±1.7 L, p<.05) were increased by 25% and 26%, respectively. There was a 16% lower total peripheral resistance (P: 20.2±8.9, S: 15.2±5.3 mmHg L-1 min-1, p=.05). The changes in resting cardiovascular function were observed in 10 participants.
Resting cardiovascular function of trained endurance athletes responds positively to 1-week intake of New Zealand Sujon blackcurrant powder. Intake of New Zealand Sujon blackcurrant powder is associated with 1) an increase in stroke volume and cardiac output, and 2) a decrease in total peripheral resistance. For resting skeletal muscles, these observations may influence the delivery of nutrients and clearance of metabolites. The effect on New Zealand Sujon blackcurrant on resting cardiovascular function may support the recovery of endurance athletes.
Ziberna L, Kim JH, Auger C, Passamonti S, Schini-Kerth V: Role of endothelial cell membrane transport in red wine polyphenols-induced coronary vasorelaxation: involvement of bilitranslocase. Food Funct. 2013, 4 (10): 1452-6. 10.1039/c3fo60160a.
Matsumoto H, Kamm KE, Stull JT, Azuma H: Delphinidin-3-rutinoside relaxes the bovine ciliary smooth muscle through activation of ETB receptor and NO/cGMP pathway. Exp Eye Res. 2005, 80 (3): 313-22. 10.1016/j.exer.2004.10.002.
Jennings A, Welch AA, Fairweather-Tait SJ: Higher anthocyanin intake is associated with lower arterial stiffness and central blood pressure in women. Am J Clin Nutr. 2012, 96 (4): 781-8. 10.3945/ajcn.112.042036.
Funding for this study and conference attendance was provided by the University of Chichester, Health Currancy Ltd (UK) and Gibb Holdings (Nelson) Ltd (NZ).
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Willems, M.E., Myers, S.D., Cook, M.D. et al. Effect of New Zealand Sujon blackcurrant on resting cardiovascular function in triathletes. J Int Soc Sports Nutr 11 (Suppl 1), P3 (2014). https://doi.org/10.1186/1550-2783-11-S1-P3
- Cardiovascular Function
- Aortic Ring
- Total Peripheral Resistance
- Endurance Athlete
- Peripheral Blood Flow