The effect of New Zealand blackcurrant on sport performance and related biomarkers: a systematic review and meta-analysis

There is a growing interest in knowing the relationship between biological maturation and sport performance-related variables of young athletes. The objective of this study is to analyze the relationship between biological maturation, physical fitness, and kinanthropometric variables of athletes during their growing period, according to their sex. The systematic review and meta-analysis followed the Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) statement and the search protocol was registered in PROSPERO, code: CRD42020208397. A search through the PubMed, Web of Sciences, and EBSCO databases was performed. A total of 423 studies were screened and 13 were included in the meta-analysis. The meta-analysis was completed by using the mean and standard deviation of each variable according to each maturation status (early, on time, or late). Differences depending on maturation were found on physical fitness, with better results in the advanced maturational groups in the male population (standard mean difference (SMD) = 0.17–2.31; p < 0.001–0.05). Differences depending on maturation were found for kinanthropometric variables in males (SMD = 0.37–2.31; p < 0.001–0.002) and height and body mass in females (SMD = 0.96–1.19; p < 0.001). In conclusion, the early maturation group showed higher values in kinanthropometric variables and better results in physical fitness, highlighting the importance of the maturational process in the talent selection programs. Despite that, more research is needed to clarify the relationship of maturation with the other variables on female populations and the changes in the muscle and bone variables during the maturation processes of both sexes.

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Effects of Arginine Supplementation on Athletic Performance Based on Energy Metabolism: A Systematic Review and Meta-Analysis

Nutrients ◽

10.3390/nu12051300 ◽

2020 ◽

Vol 12 (5) ◽

pp. 1300 ◽

Cited By ~ 2

Author(s):

Aitor Viribay ◽

José Burgos ◽

Julen Fernández-Landa ◽

Jesús Seco-Calvo ◽

Juan Mielgo-Ayuso

Keyword(s):

Systematic Review ◽

Meta Analysis ◽

Sport Performance ◽

Aerobic Performance ◽

Anaerobic Performance ◽

Performance Tests ◽

Physiological Demands ◽

Mean Differences ◽

Meta Analyses ◽

Aerobic And Anaerobic

Nitric oxide related ergogenic aids such as arginine (Arg) have shown to impact positively on sport performance through several physiological and metabolic mechanisms. However, research results have shown to be controversial. The great differences regarding required metabolic pathways and physiological demands between aerobic and anaerobic sport disciplines could be the reasons. The aim of this systematic review and meta-analysis was to evaluate the effects of Arg supplementation on aerobic (≤VO2max) and anaerobic (>VO2max) performance. Likewise, to show the effective dose and timing of this supplementation. A structured search was carried out in accordance with PRISMA® (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) statement and PICOS guidelines in PubMed/MEDLINE, Web of Science (WOS), and Scopus databases from inception to January 2020. Eighteen studies were included which compare Arg supplementation with placebo in an identical situation and testing its effects on aerobic and anaerobic performance tests. Trials analyzing supplementation with other supplements were removed and there was not athlete’s level, gender, ethnicity, or age filters. The performed meta-analysis included 15 studies and random effects model and pooled standardized mean differences (SMD) were used according to Hedges’ g. Results revealed that Arg supplementation could improve aerobic (SMD, 0.84; 95% CI, 0.12 to 1.56; magnitude of SMD (MSMD), large; I2, 89%; p = 0.02) and anaerobic (SMD, 0.24; 95% CI, 0.05 to 0.43; MSMD, small; I2, 0%; p = 0.01) performance tests. In conclusion, acute Arg supplementation protocols to improve aerobic and anaerobic performance should be adjusted to 0.15 g/kg of body weight ingested between 60–90 min before. Moreover, chronic Arg supplementation should include 1.5–2 g/day for 4–7 weeks in order to improve aerobic performance, and 10–12 g/day for 8 weeks to enhance anaerobic performance.

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The impact of lamb and ewe mortality associated with dystocia on Australian and New Zealand sheep farms: A systematic review, meta-analysis and bio-economic model

Preventive Veterinary Medicine ◽

10.1016/j.prevetmed.2021.105478 ◽

2021 ◽

Vol 196 ◽

pp. 105478

Author(s):

Mieghan Bruce ◽

John M. Young ◽

David G. Masters ◽

Gordon Refshauge ◽

Andrew N. Thompson ◽

...

Keyword(s):

Systematic Review ◽

New Zealand ◽

Economic Model ◽

Meta Analysis ◽

The Impact

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The Association of Sport Performance with ACE and ACTN3 Genetic Polymorphisms: A Systematic Review and Meta-Analysis

PLoS ONE ◽

10.1371/journal.pone.0054685 ◽

2013 ◽

Vol 8 (1) ◽

pp. e54685 ◽

Cited By ~ 97

Author(s):

Fang Ma ◽

Yu Yang ◽

Xiangwei Li ◽

Feng Zhou ◽

Cong Gao ◽

...

Keyword(s):

Systematic Review ◽

Genetic Polymorphisms ◽

Meta Analysis ◽

Sport Performance

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Relative risk of cervical cancer in indigenous women in Australia, Canada, New Zealand, and the United States: A systematic review and meta-analysis

Journal of Public Health Policy ◽

10.1057/jphp.2012.8 ◽

2012 ◽

Vol 33 (2) ◽

pp. 148-164 ◽

Cited By ~ 25

Author(s):

Marija Vasilevska ◽

Stephanie A Ross ◽

Dionne Gesink ◽

David N Fisman

Keyword(s):

United States ◽

Systematic Review ◽

Cervical Cancer ◽

New Zealand ◽

Relative Risk ◽

Meta Analysis ◽

The United States ◽

Indigenous Women

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Inspiratory Muscle Training Program Using the PowerBreath®: Does It Have Ergogenic Potential for Respiratory and/or Athletic Performance? A Systematic Review with Meta-Analysis

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18136703 ◽

2021 ◽

Vol 18 (13) ◽

pp. 6703

Author(s):

Diego Fernández-Lázaro ◽

David Gallego-Gallego ◽

Luis A Corchete ◽

Darío Fernández Zoppino ◽

Jerónimo J González-Bernal ◽

...

Keyword(s):

Systematic Review ◽

Meta Analysis ◽

Sport Performance ◽

Inspiratory Muscle ◽

Inspiratory Muscle Training ◽

Inspiratory Pressure ◽

Cochrane Library ◽

Resistive Load ◽

Muscle Training ◽

Maximum Inspiratory Pressure

This systematic review and meta-analysis aim to provide scientific evidence regarding the effects of training on respiratory muscle training’s impact with the PowerBreath®. A systematic analysis based on the PRISMA guides and a conducted research structured around the bases of Web of Science, Scopus, Medline/PubMed, SciELO y Cochrane Library Plus. Six articles published before January 2021 were included. The documentation and quantification of heterogeneity in every meta-analysis were directed through Cochran’s Q test and the statistic I2; additionally, a biased publication analysis was made using funnel plots, whose asymmetry was quantified Egger’s regression. The methodological quality was assessed through McMaster’s. PowerBreath® administering a ≥ 15% resistive load of the maximum inspiratory pressure (PIM) achieves significant improvements (54%) in said pressure within 4 weeks of commencing the inspiratory muscle training. The maximal volume of oxygen (VO2max) considerable enhancements was achieved from the 6 weeks associated with the maximum inspiratory pressure ≥ 21.5% post inspiratory muscle training onwards. Conversely, a significant blood lactate concentration decrement occurred from the 4th week of inspiratory muscle training, after a maximum inspiratory pressure ≥ 6.8% increment. PowerBreath® is a useful device to stimulate sport performance and increase pulmonary function.

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