Abstract Title:

Improved lung function following dietary antioxidant supplementation in exercise-induced asthmatics.

Abstract Source:

Respir Physiol Neurobiol. 2016 Jan ;220:95-101. Epub 2015 Nov 16. PMID: 26453914

Abstract Author(s):

Stephanie P Kurti, Jill D Murphy, Christine S Ferguson, Kelly R Brown, Joshua R Smith, Craig A Harms

Article Affiliation:

Stephanie P Kurti


INTRODUCTION: Oxidative stress is a characteristic of exercise-induced asthma (EIA), however antioxidant supplementation may attenuate EIA. The purpose of this study was to determine if ascorbic (AsA) andα-tocopherol supplementation would improve airway function in subjects with EIA.

METHODS: A single-blind randomized crossover design with eight clinically diagnosed EIA subjects (22.0± 0.7 year) and five healthy control subjects (28.2 ± 1.4 year) was used. Subjects consumed vitamins (V) (AsA 500 mg; α-tocopherol 300 IU) or placebo (PLA) daily for three weeks, followed by a three week washout period and then three weeks of the alternative treatment. Ten-minute treadmill tests(90% VO2peak) were performed with pulmonary function testing (forced vital capacity (FVC), forced expiratory volume in one second (FEV1) and between 25 and 75% (FEF25-75%), and peak expiratory flow rates (PEFR)) measured pre-exercise and 1, 5, 15, and 30 min post-exercise.

RESULTS: Supplementation led to significant improvements at minute 5 and minute 15 in FVC; FEV1; PERF; FEF25-75% and minute 30 in FEV1 and FEF25-75% post-exercise.

CONCLUSION: AsA andα-tocopherol may aid the recovery of pulmonary function in subjects with EIA.

Study Type : Human Study

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Sayer Ji
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