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Pre-workout Dietary Nitrate Magnifies Training-induced Benefits to Physical Function in Late Postmenopausal Women: A Randomized Pilot Study.
Carter, Stephen J; Blechschmid, Tyler H; Baranauskas, Marissa N; Long, Emily B; Gruber, Allison H; Raglin, John S; Lim, Kenneth; Coggan, Andrew R.
Afiliación
  • Carter SJ; Kinesiology, Indiana University Bloomington, Bloomington, IN, United States.
  • Blechschmid TH; Department of Kinesiology, Indiana University, Bloomington, IN, United States.
  • Baranauskas MN; Human Physiology & Nutrition, University of Colorado Colorado Springs, Colorado Springs, CO, United States.
  • Long EB; Department of Kinesiology, Indiana University Bloomington, Bloomington, IN, United States.
  • Gruber AH; Department of Kinesiology, Indiana University Bloomington, Bloomington, IN, United States.
  • Raglin JS; Department of Kinesiology, Indiana University Bloomington, Bloomington, IN, United States.
  • Lim K; Division of Nephrology & Hypertension, Indiana University School of Medicine - Lafayette, Indianapolis, IN, United States.
  • Coggan AR; Department of Kinesiology, Indiana University - Purdue University Indianapolis, Indianapolis, IN, United States.
Am J Physiol Regul Integr Comp Physiol ; 2024 Sep 09.
Article en En | MEDLINE | ID: mdl-39250543
ABSTRACT
To inform endpoints for future work, we explored the utility of pre-workout (i.e., an acute dose before training) beetroot juice (BRJ) combined with exercise (BRJ+EX) to augment indices of physical function in postmenopausal women compared to exercise only (EX). A two-arm pilot was employed to compare 24 postmenopausal women following an 8-wk, circuit-based exercise intervention. Participants were randomized to BRJ+EX (n = 12) or EX (n = 12). BRJ+EX participants consumed 140-mL of BRJ 120-180 min (only) before training for 7-wk, then discontinued during the final week to mitigate carryover effects. Physical function indices were 6-min walk test (6MWT), estimated V̇O2peak, heart rate recovery (HRR), and maximal knee extensor power (Pmax). A treadmill task was used to measure V̇O2 on-kinetics wherein mean response time (MRT) coincided with the duration to reach 63% of steady-state V̇O2. Results showed greater changes (Δ) among BRJ+EX participants for 6MWT distance (40 ± 23 m vs. 8 ± 25 m; p = 0.003, d = 1.35), ΔV̇O2peak (1.5 ± 0.9 mLꞏkg-1ꞏmin-1 vs. 0.3 ± 1.0 mLꞏkg-1ꞏmin-1; p = 0.008, d = 1.20), and ΔHRR (-10 ± 6 bpm vs. -1 ± 9 bpm; p = 0.017, d = 1.05). Large and medium effect sizes favoring BRJ+EX were detected for ΔPmax (p = 0.07, d = 0.83) and ΔMRT (p = 0.257, d = 0.50), respectively. In postmenopausal women, BRJ+EX appears to magnify some adaptive benefits to physical function including aerobic capacity and recovery beyond that of training without BRJ. Investigation into contributing mechanisms is needed.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Am J Physiol Regul Integr Comp Physiol Asunto de la revista: FISIOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Am J Physiol Regul Integr Comp Physiol Asunto de la revista: FISIOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos