Antioxidant-rich foods and response to altitude training: A randomized controlled trial in elite endurance athletes

Scandinavian Journal of Medicine & Science in Sports
A E KoivistoS K Bøhn

Abstract

High doses of isolated antioxidant supplements such as vitamin C and E have demonstrated the potential to blunt cellular adaptations to training. It is, however, unknown whether intake of high doses of antioxidants from foods has similar effects. Hence, the aim of the study was to investigate whether intake of antioxidant-rich foods affects adaptations to altitude training in elite athletes. In a randomized controlled trial, 31 national team endurance athletes (23 ± 5 years) ingested antioxidant-rich foods (n = 16) or eucaloric control foods (n = 15) daily during a 3-week altitude training camp (2320 m). Changes from baseline to post-altitude in hemoglobin mass (Hbmass ; optimized CO rebreathing), maximal oxygen uptake (VO2max ; n = 16) or 100 m swimming performance (n = 10), and blood parameters were compared between the groups. The antioxidant group significantly increased total intake of antioxidant-rich foods (~118%) compared to the control group during the intervention. The total study population improved VO2max by 2.5% (1.7 mL/kg/min, P = .006) and Hbmass by 4.7% (48 g, P < .001), but not 100 m swimming performance. No difference was found between the groups regarding changes in Hbmass , VO2max or swimming performance. Ho...Continue Reading

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Citations

Jul 4, 2019·Current Pharmaceutical Design·Rosario Pastor, Josep A Tur
Dec 17, 2020·High Altitude Medicine & Biology·Marissa N BaranauskasRobert F Chapman
Nov 19, 2020·International Journal of Environmental Research and Public Health·Madalyn Riley HigginsMojtaba Kaviani
Dec 30, 2020·Nutrients·Aneta Otocka-Kmiecik, Aleksandra Król
Apr 29, 2021·Scandinavian Journal of Medicine & Science in Sports·Anu Elisa Koivisto-MørkGøran Paulsen
Jul 16, 2021·Medicine and Science in Sports and Exercise·Øyvind SkatteboJostein Hallén
Aug 24, 2021·The British Journal of Nutrition·Alex GriffithsOliver Michael Shannon

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