scholarly journals Is power training effective to produce muscle hypertrophy in older adults? A systematic review and meta-analysis

2020 ◽  
Vol 45 (9) ◽  
pp. 1031-1040
Author(s):  
Lucas B.R. Orssatto ◽  
Ewertton S. Bezerra ◽  
Anthony J. Shield ◽  
Gabriel S. Trajano
Keyword(s):  
Systematic Review ◽  
Older Adults ◽  
Resistance Training ◽  
Analytical Approach ◽  
Muscle Hypertrophy ◽  
Meta Analysis ◽  
Significant Heterogeneity ◽  
Power Training ◽  
Similar Extent ◽  
High Quality

Power training has been suggested to be effective in improving strength, power, and functional capacity in older adults. However, there is still a lack of systematic investigations reporting its effectiveness for muscle hypertrophy. Thus, this study investigated the effect of power training on muscle hypertrophy and compared its magnitude with traditional moderate-velocity resistance training in older adults. A systematic search was conducted to identify clinical trials investigating the effect of power training on muscle hypertrophy (power training vs. control) and/or comparing the effect of power training versus moderate-velocity resistance training for a meta-analytical approach. Ten studies comparing power training to control conditions and 9 studies comparing power training to moderate-velocity resistance training were selected. Three studies were classified as high quality and 2 were preregistered. The meta-analysis showed that power training was superior for muscle hypertrophy compared with control condition (n = 8 studies; standardised mean difference (SMD) = 0.31; 95% confidence interval (CI) = 0.04, 0.58; p = 0.029), and resulted in similar hypertrophy compared with moderate-velocity resistance training (n = 7 studies; SMD = 0.07; 95% CI = –0.18, 0.32; p = 0.50). No significant heterogeneity was observed (p = 0.46 and 0.54, and I2 = 0% and 0%, respectively). Our data suggest that power training is effective for muscle hypertrophy in older adults, with similar effectiveness as moderate-velocity resistance training. (PROSPERO registration no.: CRD42019128951.) Novelty It is known that power training might be superior to moderate-velocity resistance training for function improvements in older adults, but there was no meta-analysis investigating its effect on muscle hypertrophy. Power training is effective to induce muscle hypertrophy in older adults to a similar extent as moderate-velocity resistance training.

scholarly journals Resistance Training with Blood Flow Restriction Compared to Traditional Resistance Training on Strength and Muscle Mass in Non-Active Older Adults: A Systematic Review and Meta-Analysis

2021 ◽  
Vol 18 (21) ◽  
pp. 11441
Author(s):  
Darío Rodrigo-Mallorca ◽  
Andrés Felipe Loaiza-Betancur ◽  
Pablo Monteagudo ◽  
Cristina Blasco-Lafarga ◽  
Iván Chulvi-Medrano
Keyword(s):  
Systematic Review ◽  
Older Adults ◽  
Blood Flow ◽  
Resistance Training ◽  
Muscle Mass ◽  
High Intensity ◽  
Meta Analysis ◽  
Small Sample ◽  
Blood Flow Restriction ◽  
Flow Restriction

Low-intensity training with blood flow restriction (LI-BFR) has been suggested as an alternative to high-intensity resistance training for the improvement of strength and muscle mass, becoming advisable for individuals who cannot assume such a load. The systematic review aimed to determine the effectiveness of the LI-BFR compared to dynamic high-intensity resistance training on strength and muscle mass in non-active older adults. A systematic review was conducted according to the Cochrane Handbook and reportedly followed the PRISMA statement. MEDLINE, EMBASE, Web of Science Core Collection, and Scopus databases were searched between September and October 2020. Two reviewers independently selected the studies, extracted data, assessed the risk of bias and the quality of evidence using the GRADE approach. Twelve studies were included in the qualitative synthesis. Meta-analysis pointed out significant differences in maximal voluntary contraction (MVC): SMD 0.61, 95% CI [0.10, 1.11], p = 0.02, I2 71% p < 0.0001; but not in the repetition maximum (RM): SMD 0.07, 95% CI [−0.25, 0.40], p = 0.66, I2 0% p < 0.53; neither in the muscle mass: SMD 0.62, 95% CI [−0.09, 1.34], p = 0.09, I2 59% p = 0.05. Despite important limitations such as scarce literature regarding LI-BFR in older adults, the small sample size in most studies, the still differences in methodology and poor quality in many of them, this systematic review and meta-analysis revealed a positive benefit in non-active older adults. LI- BFR may induce increased muscular strength and muscle mass, at least at a similar extent to that in the traditional high-intensity resistance training.

scholarly journals Left-Sided Atrial Septal Pouch as a Risk Factor of Cryptogenic Stroke: A Systematic Review and Meta-Analysis

2018 ◽  
Vol 46 (5-6) ◽  
pp. 223-229 ◽  
Author(s):  
Mateusz K. Hołda ◽  
Mateusz Koziej
Keyword(s):  
Systematic Review ◽  
Risk Factor ◽  
Analytical Approach ◽  
Meta Analysis ◽  
Univariate Analysis ◽  
Cryptogenic Stroke ◽  
Significant Heterogeneity ◽  
Stroke Patients ◽  
Control Data ◽  
Pooled Prevalence

Background: Despite some evidence of left-sided septal pouch (LSSP) involvement in the pathogenesis of cardioembolic stroke, the question of LSSP clinical significance still remains unsolved. In this study, we aimed to determine the association between the LSSP presence and cryptogenic stroke using meta-analytical approach. Methods: We performed a systematic review of electronic databases for studies that compared the presence of LSSP in subjects with cryptogenic stroke and non-stroke control. Data were extracted and pooled into a meta-analysis. Results: Seven studies (400 cryptogenic stroke patients and 1,456 non-stroke controls) were included in the meta-analysis. A total of 138 LSSPs were identified among the cryptogenic stroke patients, with a pooled prevalence of 29.8% (95% CI 17.5–43.7%), and 268 LSSPs were identified in the non-stroke controls, with a pooled prevalence of 21.0% (95% CI 13.7–29.5%). After meta-analysis, the risk of cryptogenic stroke was higher in patients with an LSSP than in patients without LSSP (OR 1.52; 95% CI 1.15–2.00; p < 0.001). No significant heterogeneity was detected across the included studies (p > 0.05). Conclusion: Our meta-analysis demonstrated association between LSSP and cryptogenic stroke. In our univariate analysis, the risk of cryptogenic stroke is higher among patients with LSSP than in cases without the LSSP.

Effects of Protein Supplementation in Older Adults Undergoing Resistance Training: A Systematic Review and Meta-Analysis

2014 ◽  
Vol 45 (2) ◽  
pp. 245-255 ◽  
Author(s):  
Débora Finger ◽  
Fernanda Reistenbach Goltz ◽  
Daniel Umpierre ◽  
Elisabeth Meyer ◽  
Luis Henrique Telles Rosa ◽  
...  
Keyword(s):  
Systematic Review ◽  
Older Adults ◽  
Resistance Training ◽  
Meta Analysis ◽  
Protein Supplementation

scholarly journals Effectiveness of Olympic Combat Sports on Balance, Fall Risk or Falls in Older Adults: A Systematic Review

Biology ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 74
Author(s):  
Pablo Valdés-Badilla ◽  
Rodrigo Ramirez-Campillo ◽  
Tomás Herrera-Valenzuela ◽  
Braulio Henrique Magnani Branco ◽  
Eduardo Guzmán-Muñoz ◽  
...  
Keyword(s):  
Systematic Review ◽  
Older Adults ◽  
Fall Risk ◽  
Meta Analysis ◽  
Combat Sports ◽  
High Quality ◽  
Grade Scale ◽  
Falls In Older Adults ◽  
Final Manuscript ◽  
Meta Analyses

This systematic review and meta-analysis aimed to assess the available body of published peer-reviewed articles related to the effects of Olympic combat sports (OCS), compared with active/passive controls, on balance, fall risk, or falls in older adults. The TESTEX and GRADE scales assessed the methodological quality and certainty of the evidence. The protocol was registered in PROSPERO (code: CRD42020204034). From 1496 records, eight studies were included, involving 322 older adults (64% female; mean age = 71.1 years). The TESTEX scale revealed all studies with a score ≥ 60% (moderate-high quality). The GRADE scale indicated all studies with at least some concerns, up to a high risk of bias (i.e., was rated very low). Meta-analyses were planned, although the reduced number of studies precluded its incorporation in the final manuscript. Only two from six studies that assessed balance found improvements after OCS compared to controls. No differences were found between OCS vs. control groups for fall risk or falls. The available evidence does not allow a definitive recommendation for or against OCS interventions as an effective strategy to improve balance and reduce the fall risk or falls in older adults. Therefore, more high-quality studies are required to draw definitive conclusions.

Muscle hypertrophy and strength gains after resistance training with different volume matched loads: a systematic review and meta-analysis.

2022 ◽  
Author(s):  
Leonardo Henrique Fernandes Carvalho ◽  
Roberto Moriggi Junior ◽  
Júlia Barreira ◽  
Brad Jon Schoenfeld ◽  
John Orazem ◽  
...  
Keyword(s):  
Systematic Review ◽  
Resistance Training ◽  
Muscle Hypertrophy ◽  
Meta Analysis ◽  
Dynamic Strength ◽  
Pooled Analysis ◽  
High Load ◽  
Mean Difference ◽  
Volume Load ◽  
Standardized Mean Difference

The purpose of this paper was to conduct a systematic review and meta-analysis of studies that compared muscle hypertrophy and strength gains between resistance training protocols employing very low (VLL<30% of 1RM or >35 RM), low (LL30%-59% of 1RM, or 16–35 RM), moderate (ML60%-79% of 1RM, or 8 -15RM) and high load (HL≥80% of 1RM, or ≤7 RM) with matched volume loads (sets x reps x weight). A pooled analysis of the standardized mean difference for 1RM strength outcomes across the studies showed a benefit favoring HL vs. LL and vs. ML; and favoring ML vs. LL. Results from LL and VLL indicated little difference. A pooled analysis of the standardized mean difference for hypertrophy outcomes across all studies showed no differences between the training loads. Our findings indicate that, when volume load is equated between conditions, the highest loads induce superior dynamic strength gains. Alternatively, hypertrophic adaptations are similar irrespective of the magnitude of load. NOVELTY BULLETS: • Training with higher loads elicits greater gains in 1RM muscle strength when compared to lower loads, even when volume load is equated between conditions. • Muscle hypertrophy is similar irrespective of the magnitude of load, even when volume load is equated between conditions.

scholarly journals Effects of linear and daily undulating periodized resistance training programs on measures of muscle hypertrophy: a systematic review and meta-analysis

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3695 ◽  
Author(s):  
Jozo Grgic ◽  
Pavle Mikulic ◽  
Hrvoje Podnar ◽  
Zeljko Pedisic
Keyword(s):  
Systematic Review ◽  
Resistance Training ◽  
Muscle Hypertrophy ◽  
Web Of Science ◽  
Training Programs ◽  
Meta Analysis ◽  
Future Studies ◽  
The Difference ◽  
Intervention Trials ◽  
Theses And Dissertations

BackgroundPeriodization is an important component of resistance training programs. It is meant to improve adherence to the training regimen, allow for constant progression, help in avoiding plateaus, and reduce occurrence and severity of injuries. Previous findings regarding the effects of different periodization models on measures of muscle hypertrophy are equivocal. To provide a more in-depth look at the topic, we undertook a systematic review of the literature and a meta-analysis of intervention trials comparing the effects of linear periodization (LP) and daily undulating periodization (DUP) resistance training programs on muscle hypertrophy.Materials and MethodsA comprehensive literature search was conducted through PubMed/MEDLINE, Scopus, Web of Science, SPORTDiscus, Networked Digital Library of Theses and Dissertations (NDLTD) and Open Access Theses and Dissertations (OATD).ResultsThe pooled standardized mean difference (Cohen’s d) from 13 eligible studies for the difference between the periodization models on muscle hypertrophy was −0.02 (95% confidence interval [−0.25, 0.21],p = 0.848).ConclusionsThe meta-analysis comparing LP and DUP indicated that the effects of the two periodization models on muscle hypertrophy are likely to be similar. However, more research is needed in this area, particularly among trained individuals and clinical populations. Future studies may benefit from using instruments that are more sensitive for detecting changes in muscle mass, such as ultrasound or magnetic resonance imaging.

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