scholarly journals The Effect of Dietary Nitrate Supplementation on Isokinetic Torque in Adults: A Systematic Review and Meta-Analysis

Nutrients ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 3022
Author(s):  
Ángel Lago-Rodríguez ◽  
Raúl Domínguez ◽  
Juan José Ramos-Álvarez ◽  
Francisco Miguel Tobal ◽  
Pablo Jodra ◽  
...  
Keyword(s):  
Systematic Review ◽  
Muscular Strength ◽  
Meta Analysis ◽  
Peak Torque ◽  
Gold Standard Method ◽  
Dietary Nitrate ◽  
Angular Velocities ◽  
Isokinetic Torque ◽  
Nitrate Supplementation ◽  
Isokinetic Peak Torque

Dietary nitrate (NO3−) supplementation, which can enhance performance in exercise settings involving repeated high-intensity efforts, has been linked to improved skeletal muscle contractile function. Although muscular strength is an important component of explosive movements and sport-specific skills, few studies have quantified indices of muscular strength following NO3− supplementation, particularly isokinetic assessments at different angular velocities. We performed a systematic review and meta-analysis to determine whether dietary NO3− supplementation improves peak torque, as assessed by the gold standard method of isokinetic dynamometry, and if this effect was linked to the angular velocity imposed during the assessment. Dialnet, Directory of Open Access Journals, MEDLINE, PubMed, SciELO, Scopus, and SPORTDiscus were searched for articles using the following search strategy: (nitrate OR beet*) AND (supplement* OR nutr* OR diet*) AND (isokinetic OR strength OR “resistance exercise” OR “resistance training” OR “muscular power”). The meta-analysis of data from 5 studies with 60 participants revealed an overall effect size of −0.01 for the effect of nitrate supplementation on isokinetic peak torque, whereas trivial effect sizes ranging from −0.11 to 0.16 were observed for independent velocity-specific (90°/s, 180°/s, 270°/s, and 360°/s) isokinetic peak torque. Four of the five studies indicated that dietary NO3− supplementation is not likely to influence voluntary knee extensor isokinetic torque across a variety of angular velocities. These results suggest that NO3− supplementation does not influence isokinetic peak torque, but further work is required to elucidate the potential of NO3− supplementation to influence other indices of muscular strength, given the dearth of experimental evidence on this topic.

Effect of dietary nitrate supplementation on metabolic rate during rest and exercise in human: A systematic review and a meta-analysis

Nitric Oxide ◽  
2016 ◽  
Vol 53 ◽  
pp. 65-76 ◽  
Author(s):  
Mehdi Pawlak-Chaouch ◽  
Julien Boissière ◽  
François X. Gamelin ◽  
Grégory Cuvelier ◽  
Serge Berthoin ◽  
...  
Keyword(s):  
Systematic Review ◽  
Metabolic Rate ◽  
Meta Analysis ◽  
Dietary Nitrate ◽  
Nitrate Supplementation ◽  
Rest And Exercise

scholarly journals Impact of dietary nitrate supplementation on exercise capacity and cardiovascular parameters in chronic respiratory disease: a systematic review and meta-analysis

2021 ◽  
Vol 8 (1) ◽  
pp. e000948
Author(s):  
Abdullah S Alsulayyim ◽  
Ali M Alasmari ◽  
Saeed M Alghamdi ◽  
Michael I Polkey ◽  
Nicholas S Hopkinson
Keyword(s):  
Systematic Review ◽  
Respiratory Disease ◽  
Exercise Capacity ◽  
Pulmonary Rehabilitation ◽  
Meta Analysis ◽  
Mean Difference ◽  
Short Term ◽  
Cardiovascular Parameters ◽  
Dietary Nitrate ◽  
Nitrate Supplementation

BackgroundDietary nitrate supplementation, usually in the form of beetroot juice, may improve exercise performance and endothelial function. We undertook a systematic review and meta-analysis to establish whether this approach has beneficial effects in people with respiratory disease.MethodsA systematic search of records up to March 2021 was performed on PubMed, CINAHL, MEDLINE (Ovid), Cochrane and Embase to retrieve clinical trials that evaluated the efficacy of dietary nitrate supplementation on cardiovascular parameters and exercise capacity in chronic respiratory conditions. Two authors independently screened titles, abstracts and full texts of potential studies and performed the data extraction.ResultsAfter full-text review of 67 papers, eleven (two randomised controlled trials and nine crossover trials) involving 282 participants met the inclusion criteria. Three were single dose; seven short term; and one, the largest (n=122), done in the context of pulmonary rehabilitation. Pooled analysis showed that dietary nitrate supplementation reduced systolic blood pressure (BP), diastolic BP and mean arterial pressure (mean difference (95% CI), −3.39 mm Hg (−6.79 to 0.01); p=0.05 and –2.20 mm Hg (−4.36 to −0.03); p=0.05 and −4.40 mm Hg (−7.49 to −1.30); p=0.005, respectively). It was associated with increased walk distance in the context of pulmonary rehabilitation (standardised mean difference (95% CI), 0.47 (0.11 to 0.83), p=0.01), but no effect was identified in short-term studies (0.08 (−0.32 to 0.49).ConclusionDietary nitrate supplementation may have a beneficial effect on BP and augment the effect of pulmonary rehabilitation on exercise capacity. Short-term studies do not suggest a consistent benefit on exercise capacity.PROSPERO registration numberCRD42019130123.

scholarly journals Worldwide Prevalence of Small Ruminant Lentiviruses in Sheep: A Systematic Review and Meta-Analysis

Animals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 784
Author(s):  
Ricardo de Miguel ◽  
Marta Arrieta ◽  
Ana Rodríguez-Largo ◽  
Irache Echeverría ◽  
Raúl Resendiz ◽  
...  
Keyword(s):  
Systematic Review ◽  
Small Ruminant ◽  
Meta Analysis ◽  
Geographical Area ◽  
Small Ruminants ◽  
Strong Positive Correlation ◽  
Scientific Publications ◽  
Serological Tests ◽  
Gold Standard Method ◽  
Small Ruminant Lentiviruses

Small Ruminant Lentiviruses (SRLV) are highly prevalent retroviruses with significant genetic diversity and antigenic heterogeneity that cause a progressive wasting disease of sheep called Maedi-visna. This work provides a systematic review and meta-analysis of the last 40 years (1981–2020) of scientific publications on SRLV individual and flock prevalence. Fifty-eight publications and 314 studies were included. Most articles used a single diagnostic test to estimate prevalence (77.6%), whereas articles using three or more tests were scarce (6.9%). Serological tests are more frequently used than direct methods and ELISA has progressively replaced AGID over the last decades. SRLV infection in sheep is widespread across the world, with Europe showing the highest individual prevalence (40.9%) and being the geographical area in which most studies have been performed. Africa, Asia, and North America show values between 16.7% to 21.8% at the individual level. South and Central America show the lowest individual SRLV prevalence (1.7%). There was a strong positive correlation between individual and flock prevalence (ρ = 0.728; p ≤ 0.001). Despite the global importance of small ruminants, the coverage of knowledge on SRLV prevalence is patchy and inconsistent. There is a lack of a gold standard method and a defined sampling strategy among countries and continents.

scholarly journals Effects of Sodium Bicarbonate Supplementation on Muscular Strength and Endurance: A Systematic Review and Meta-analysis

2020 ◽  
Vol 50 (7) ◽  
pp. 1361-1375 ◽  
Author(s):  
Jozo Grgic ◽  
Ramon F. Rodriguez ◽  
Alessandro Garofolini ◽  
Bryan Saunders ◽  
David J. Bishop ◽  
...  
Keyword(s):  
Systematic Review ◽  
Sodium Bicarbonate ◽  
Muscular Strength ◽  
Meta Analysis

scholarly journals Systematic Review and Meta-Analysis on Proximal-to-Distal Sequencing in Team Handball: Prospects for Talent Detection?

2018 ◽  
Vol 63 (1) ◽  
pp. 9-21 ◽  
Author(s):  
Ben Serrien ◽  
Jean-Pierre Baeyens
Keyword(s):  
Systematic Review ◽  
Internal Rotation ◽  
Meta Analysis ◽  
Small Sample ◽  
Trunk Rotation ◽  
Elbow Extension ◽  
Trunk Flexion ◽  
Team Handball ◽  
Angular Velocities ◽  
Pelvis Rotation

Abstract The proximal-to-distal sequence has previously been discussed in the light of performance and injury prevention. Sports biomechanics literature in general, and in team handball in specific, has claimed to be of importance to inform coaches on what constitutes a ‘good’ technical performance. However, hitherto no prospective studies exist on how this information may be used and this may in part be due to the general small sample sizes. We therefore performed a systematic review and meta-analysis of proximal-to-distal sequencing in team handball throwing motions. A total of fourteen articles were included in the systematic review. Meta-analyses were performed for the timing of maximal angles and angular velocities as well as initiation of joint angular velocities in the penalty throw, the standing throw with run-up and the jump shot of experienced team handball players. For the initiation of joint angular velocities, the overall sequence was estimated to start with pelvis rotation, followed by trunk rotation, trunk flexion, shoulder internal rotation and elbow extension. For maximal velocities, the sequence started with pelvis rotation, followed by trunk rotation, trunk flexion, elbow extension, and shoulder internal rotation (post ball release). The obtained results were discussed in the light of talent identification purposes. Limitations to individual study methodology and of the present meta-analysis were also discussed. Much more research will be necessary, but at the very least, this review can provide a starting point for evidence-based discussions between movement scientists and team handball coaches to include proximal-to-distal sequencing as a measure of coordination to gauge early onset of talent.

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