Dietary beetroot juice - effects on physical performance in COPD patients: a randomized controlled crossover trial.

ABSTRACT:

Background and objective

Dietary beetroot juice (BR) supplementation has been shown to reduce the oxygen (O₂) consumption of standardized exercise and reduce resting blood pressure (BP) in healthy individuals. However, the physiological response of BR in chronic obstructive pulmonary disease (COPD) remains controversial. The objective was to test exercise performance in COPD, supplementing with higher doses of BR for a longer duration compared to previous trials in this patient group.

Methods

Fifteen COPD patients consumed concentrated BR (2×70 mL twice daily, each containing 300 mg nitrate) or placebo (PL) (2×70 mL twice daily, nitrate-negligible) in a randomized order for 6 consecutive days. On day 7, participants consumed either BR or PL 150 min before testing.

SUBMITTER: Friis AL 

PROVIDER: S-EPMC5479267 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature