The influence of acute dietary nitrate supplementation on skeletal muscle fatigue and recovery in older women

Author:

Zoughaib William S.1,Hoffman Richard L.1,Yates Brandon A.2,Moorthi Ranjani N.3,Lim Kenneth3,Coggan Andrew R.12ORCID

Affiliation:

1. Department of Kinesiology, School of Health & Human Sciences Indiana University Purdue University Indianapolis Indianapolis Indiana USA

2. Indiana Center for Musculoskeletal Health Indiana University School of Medicine Indianapolis Indiana USA

3. Division of Nephrology and Hypertension, Department of Medicine Indiana University School of Medicine Indianapolis Indiana USA

Abstract

AbstractOlder individuals fatigue more rapidly during, and recover more slowly from, dynamic exercise. Women are particularly vulnerable to these deleterious effects of aging, which increases their risk of falling. We have shown that dietary nitrate (NO3), a source of nitric oxide (NO) via the NO3 → nitrite (NO2) → NO pathway, enhances muscle speed and power in older individuals in the non‐fatigued state; however, it is unclear if it reduces fatigability and/or improves recoverability in this population. Using a double‐blind, placebo‐controlled, crossover design, we studied 18 older (age 70 ± 4 years) women who were administered an acute dose of beetroot juice (BRJ) containing either 15.6 ± 3.6 or <0.05 mmol of NO3. Blood samples were drawn throughout each ~3 h visit for plasma NO3 and NO2 analysis. Peak torque was measured during, and periodically for 10 min after, 50 maximal knee extensions performed at 3.14 rad/s on an isokinetic dynamometer. Ingestion of NO3‐containing BRJ increased plasma NO3 and NO2 concentrations by 21 ± 8 and 4 ± 4 fold, respectively. However, there were no differences in muscle fatigue or recovery. Dietary NO3 increases plasma NO3 and NO2 concentrations but does not reduce fatigability during or enhance recoverability after high intensity exercise in older women.

Funder

National Institutes of Health

Publisher

Wiley

Subject

Physiology (medical),Physiology

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3