PMID- 29527927
OWN - NLM
STAT- MEDLINE
DCOM- 20181126
LR  - 20181126
IS  - 1715-5320 (Electronic)
IS  - 1715-5312 (Linking)
VI  - 43
IP  - 8
DP  - 2018 Aug
TI  - Acute beetroot juice administration improves peak isometric force production in 
      adolescent males.
PG  - 816-821
LID - 10.1139/apnm-2018-0050 [doi]
AB  - The purpose of this study was to examine the effects of acute beetroot juice (BR) 
      administration on repeated sprint performance and isometric force production in 
      adolescent males. Twelve male adolescents (age, 16.8 +/- 1.0 years; height, 178.8 +/- 
      9.2 cm; mass, 74.8 +/- 12.5 kg; peak height velocity, 2.53 +/- 1.2 years) 
      participated in this double-blind, placebo-controlled, crossover designed study. 
      Participants consumed 2 x 70 mL of BR ( approximately 12.9 mmol NO(3)(-); Beet It Sport) or a 
      nitrate-depleted placebo (PL) at 2.5 h prior to performing isometric mid-thigh 
      pulls (IMTP) and 4 repeated 20-s Wingate sprints interspersed with 4 min of rest. 
      Sprint data were analyzed by a 2 x 4 (group x time) repeated-measures ANOVA while 
      a dependent t test was used to compare conditions for IMTP peak force. A 
      significant main effect for time (p < 0.05) was observed for peak power (PP), 
      average power (P(avg)), and fatigue index (FI) across sprints. Compared with 
      sprint 1, sprint 4 resulted in significant decreases in PP (p < 0.000; -16.6%) 
      and P(avg) (p = 0.000; -21.8%) and FI was significantly elevated (p < 0.000; 
      15.2%). No significant group x time interactions were observed between conditions 
      for PP (p = 0.402), P(avg) (p = 0.479), or FI (p = 0.37). IMTP peak force was 
      significantly higher (p = 0.004; 13.9%) following BR consumption compared with 
      PL. The repeated sprint protocol resulted in significant fatigue while BR did not 
      influence sprint performance. However, it appears BR administration may improve 
      peak force production in adolescent males.
FAU - Bender, David
AU  - Bender D
AD  - a Exercise and Nutrition Science Graduate Program, Lipscomb University, 
      Nashville, TN 37204, USA.
FAU - Townsend, Jeremy R
AU  - Townsend JR
AD  - a Exercise and Nutrition Science Graduate Program, Lipscomb University, 
      Nashville, TN 37204, USA.
FAU - Vantrease, William C
AU  - Vantrease WC
AD  - a Exercise and Nutrition Science Graduate Program, Lipscomb University, 
      Nashville, TN 37204, USA.
FAU - Marshall, Autumn C
AU  - Marshall AC
AD  - a Exercise and Nutrition Science Graduate Program, Lipscomb University, 
      Nashville, TN 37204, USA.
FAU - Henry, Ruth N
AU  - Henry RN
AD  - a Exercise and Nutrition Science Graduate Program, Lipscomb University, 
      Nashville, TN 37204, USA.
FAU - Heffington, Stephen H
AU  - Heffington SH
AD  - b School of Physician Assistant Studies, Lipscomb University, Nashville, TN 
      37204, USA.
FAU - Johnson, Kent D
AU  - Johnson KD
AD  - a Exercise and Nutrition Science Graduate Program, Lipscomb University, 
      Nashville, TN 37204, USA.
LA  - eng
PT  - Journal Article
PT  - Randomized Controlled Trial
DEP - 20180310
PL  - Canada
TA  - Appl Physiol Nutr Metab
JT  - Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition 
      et metabolisme
JID - 101264333
RN  - 0 (Nitrates)
SB  - IM
MH  - Adolescent
MH  - Age Factors
MH  - *Beta vulgaris
MH  - Cross-Over Studies
MH  - Double-Blind Method
MH  - Exercise Test
MH  - *Fruit and Vegetable Juices
MH  - Humans
MH  - Isometric Contraction/*drug effects
MH  - Male
MH  - Muscle Fatigue/drug effects
MH  - Muscle Strength/*drug effects
MH  - Muscle, Skeletal/*drug effects/physiology
MH  - Nitrates/*administration & dosage/adverse effects
MH  - *Plant Roots
MH  - Running
MH  - Sex Factors
MH  - Tennessee
MH  - Time Factors
MH  - Treatment Outcome
OTO - NOTNLM
OT  - anaerobic exercise
OT  - dietary nitrates
OT  - entrainement par intervalle d'intensite elevee
OT  - exercice anaerobie
OT  - high-intensity interval training
OT  - jeunesse
OT  - nitrate alimentaire
OT  - nitric oxide
OT  - oxyde nitrique
OT  - youth
EDAT- 2018/03/13 06:00
MHDA- 2018/11/27 06:00
CRDT- 2018/03/13 06:00
PHST- 2018/03/13 06:00 [pubmed]
PHST- 2018/11/27 06:00 [medline]
PHST- 2018/03/13 06:00 [entrez]
AID - 10.1139/apnm-2018-0050 [doi]
PST - ppublish
SO  - Appl Physiol Nutr Metab. 2018 Aug;43(8):816-821. doi: 10.1139/apnm-2018-0050. 
      Epub 2018 Mar 10.