Consumption of An Anthocyanin-Rich Antioxidant Juice Accelerates Recovery of Running Economy and Indirect Markers of Exercise-Induced Muscle Damage Following Downhill Running.

Leonardo C R Lima,Natália M Bassan,Camila C Greco,Benedito S Denadai,Renan V Barreto

doi:10.3390/nu11102274

Leonardo C R Lima, Natália M Bassan + Show 3 more

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https://doi.org/10.3390/nu11102274

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Journal: Nutrients	Publication Date: Sep 23, 2019
Citations: 14	License type: CC BY 4.0

Affiliation: Universidade Estadual Paulista (Unesp)

Abstract

This study examined the effects of anthocyanin-rich antioxidant juice (AJ) on the recovery of exercise-induced muscle damage (EIMD) and the running economy (RE) following downhill running (DHR). Thirty healthy young men were randomly divided into two blinded groups and consumed either AJ or placebo (PLA) for nine days (240 mL twice-a-day). On day 5, the participants from both groups ran downhill (−15%) for 30 min at 70% of their maximal oxygen uptake (VO2max) speeds. The changes in RE (oxygen uptake (VO2) and perceived effort (PE) during 5-min runs at 80%VO2max) and EIMD (isometric peak torque (IPT), muscle soreness (SOR) and serum creatine kinase activity (CK)) were compared over time and between the groups on the 4 days following DHR. VO2 and PE increased (p < 0.05) immediately following DHR for both groups and remained elevated for PLA until 48h post-DHR while fully recovering 24 h post-DHR for AJ. SOR was greater (p < 0.05) for PLA throughout the study. CK increased for both groups and was greater (p < 0.05) for PLA at 96 h post-DHR. IPT decreased for both groups but recovered faster for AJ (72 h) compared to PLA (no full recovery). AJ accelerated recovery of RE and EIMD and should be used in specific contexts, but not chronically.

Highlights

The running economy (RE) is an important predictor of performance in endurance events.It is defined as the amount of oxygen required to sustain running at a fixed submaximal speed [1].RE represents, how efficient athletes are during running
A growing body of literature investigated the effects of exercise-induced muscle damage (EIMD) on parameters associated with RE [3,4,5]
The present study found that antioxidant juice consumption results in faster recovery of muscle function as well as attenuated muscle soreness and serum creatine kinase (CK) activity following an exercise bout consisting of 30 min of downhill running (DHR)

Summary

Introduction

The running economy (RE) is an important predictor of performance in endurance events.It is defined as the amount of oxygen required to sustain running at a fixed submaximal speed [1].RE represents, how efficient athletes are during running. The running economy (RE) is an important predictor of performance in endurance events. It is defined as the amount of oxygen required to sustain running at a fixed submaximal speed [1]. Athletes with similar maximal oxygen consumptions (VO2 max) may present different performances in long-distance runs due to the differences in RE [2]. A growing body of literature investigated the effects of exercise-induced muscle damage (EIMD) on parameters associated with RE [3,4,5]. EIMD occurs when muscle tissue is damaged following strenuous exercise, leading to compromised force production capacity, muscle soreness and leakage of intracellular proteins to the circulation [6]

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