scholarly journals Does Acute Caffeine Supplementation Improve Physical Performance in Female Team-Sport Athletes? Evidence from a Systematic Review and Meta-Analysis

Nutrients ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 3663
Author(s):  
Alejandro Gomez-Bruton ◽  
Jorge Marin-Puyalto ◽  
Borja Muñiz-Pardos ◽  
Angel Matute-Llorente ◽  
Juan Del Coso ◽  
...  
Keyword(s):  
Physical Performance ◽  
Perceived Exertion ◽  
Female Athletes ◽  
Handgrip Strength ◽  
Meta Analysis ◽  
Team Sports ◽  
Team Sport ◽  
Risk Of Bias ◽  
Caffeine Intake ◽  
Original Research

Introduction: Recent original research and meta-analyses suggest that acute caffeine supplementation improves exercise performance in team-sport athletes (TSA). Nonetheless, most of the studies testing the effects of caffeine on TSA included samples of male athletes, and there is no meta-analysis of the performance-enhancing effects of caffeine on female TSA. The aim of the present study was to synthesize the existing literature regarding the effect of caffeine supplementation on physical performance in adult female TSA. Methods: A search was performed in Pubmed/Medline, SPORTDiscus and Scopus. The search was performed from the inception of indexing until 1 September 2021. Crossover randomized controlled trials (RCT) assessing the effects of oral caffeine intake on several aspects of performance in female TSA were selected. The methodological quality and risk of bias were assessed for individual studies using the Physiotherapy Evidence Database scale (PEDro) and the RoB 2 tool. A random-effects meta-analysis of standardized mean differences (SMD) was performed for several performance variables. Results: The search retrieved 18 articles that fulfilled the inclusion/exclusion criteria. Overall, most of the studies were of excellent quality with a low risk of bias. The meta-analysis results showed that caffeine increased performance in specific team-sport skills (SMD: 0.384, 95% confidence interval (CI): 0.077–0.691), countermovement jump (SMD: 0.208, CI: 0.079–0.337), total body impacts (SMD: 0.488; 95% CI: 0.050, 0.927) and handgrip strength (SMD: 0.395, CI: 0.126–0.665). No effects were found on the ratings of perceived exertion, squat jumps, agility, repeated sprint ability or agility tests performed after fatigue. Conclusions: The results of the meta-analysis revealed that acute caffeine intake was effective in increasing some aspects of team-sports performance in women athletes. Hence, caffeine could be considered as a supplementation strategy for female athletes competing in team sports.

scholarly journals Examination of Cognitive Flexibility Levels of Young Individual and Team Sport Athletes

2018 ◽  
Vol 6 (8) ◽  
pp. 149 ◽  
Author(s):  
Şehmus Aslan
Keyword(s):  
High School Students ◽  
Cognitive Flexibility ◽  
Female Athletes ◽  
Team Sports ◽  
Team Sport ◽  
Study Data ◽  
Validity And Reliability ◽  
School Students ◽  
The Individual ◽  
Individual Sports

The purpose of this study was to compare the level of cognitive flexibility of individual and team athletes who are students. The study included a total of 237 volunteer athletes, comprising 140 males (59.1%) and 97 females (40.9%) with a mean age of 18.98 ± 2.18 years (range, 16-26 years) who were licensed to participate in individual and team sports. Study data were collected using the Cognitive Flexibility Scale developed by Martin and Rubin (1995), which consists of 12 items in total. International validity and reliability studies were conducted by Martin and Rubin, and Turkish validity and reliability studies were conducted by Çelikkaleli on high school students (Çelikkaleli, 2014). The scores of the Cognitive Flexibility Scale were found to be higher in the team sports athletes compared with the individual sports athletes (p<0.05). No difference was determined between the levels of cognitive flexibility in male and female athletes. The results indicated that the cognitive flexibility levels of team athletes are higher than those of individual athletes.

scholarly journals Sarcopenic is associated with hypertension in older adults: a systematic review and meta-analysis

2020 ◽  
Author(s):  
Tingting Bai ◽  
Fang Fang ◽  
Feika Li ◽  
Yan Ren ◽  
Jiaan Hu ◽  
...  
Keyword(s):  
Systematic Review ◽  
Older Adults ◽  
Confidence Interval ◽  
Handgrip Strength ◽  
Meta Analysis ◽  
Cochrane Library ◽  
Original Research ◽  
Inclusion Criteria ◽  
Asian Group ◽  
Research Studies

Abstract BackgroundBoth sarcopenia and handgrip strength have been observed association with hypertension. However, the results in different studies were inconsistent. In the current study, we conducted a systematic review and meta-analysis to reveal the association between sarcopenia, handgrip strength, and hypertension in older adults.MethodsPubMed, MEDLINE, Cochrane Library, and EMBASE databases were searched from inception to 15 November, 2019for original research studies. The studies that addressed the association between sarcopenia, handgrip strength, and hypertension were included and summarized.Results19 studies met the inclusion criteria and a total of 21301 were included in the meta-analysis. Eight eligible studiesreported the odd ratios (ORs) of hypertension and the ORs ranged from 0.41 to 4.38. When pooled the ORs together, the summarized ORs was 1.29 [95% confidence interval (CI) =1.00-1.67]. The summarized ORs for the Asian group 1.50 (95% CI=1.35-1.67) was significantly higher than that of Caucasian group 1.08 (95% CI=0.39-2.97). Eleven studies provided the data on association between handgrip strength and hypertension. The overall ORs and 95% CI was 0.99 (95% CI=0.80-1.23), showing no association.ConclusionSarcopenia was associated with hypertension but no correlation was found between handgrip strength and hypertension in older adults.

scholarly journals The relationship between pregnancy intentions and diet or physical activity behaviours in the preconception and antenatal periods: A systematic review and meta-analysis

2019 ◽  
Author(s):  
Isaac Nkrumah ◽  
Madelon North ◽  
Emily Jane Kothe ◽  
Tze Lin Chai ◽  
Stephanie Pirotta ◽  
...  
Keyword(s):  
Physical Activity ◽  
Systematic Review ◽  
Meta Analysis ◽  
Pregnancy Intention ◽  
Risk Of Bias ◽  
Folate Intake ◽  
Caffeine Intake ◽  
Pregnancy Intentions ◽  
Diet And Physical Activity ◽  
Meta Analyses

Introduction: Healthy preconception and antenatal diet and physical activity behaviours are crucial to prevent adverse maternal and offspring outcomes. These behaviours are thought to be linked to pregnancy intentions. The aim of this study was to conduct a systematic review and meta-analysis to determine the association between women’s pregnancy intentions and diet or physical activity behaviours in the preconception and antenatal periods. Methods: Medline Complete, PsycINFO, CINAHL Complete, Global Health, Embase, and INFORMIT: Health Subset were searched in September 2018 for studies that evaluated relationships between pregnancy intentions and dietary and physical activity behaviours. Risk of bias was assessed and random effects meta-analyses were conducted for dietary (food groups; energy and macronutrients; diet quality; and caffeine, iodine and folate intake) and physical activity outcomes.Results: Of 2623 screened records, 19 eligible studies were identified. Overall risk of bias was moderate to high. Twelve studies measured diet/physical activity behaviours during preconception, 5 during pregnancy, and 2 across both periods. Eleven studies measured pregnancy intention retrospectively, and 8 prospectively measured pregnancy intention. The number of studies available for meta-analyses of individual dietary and physical activity outcomes ranged from 2 to 5. Pregnancy intentions were not associated with preconception fruit, vegetable, or caffeine intake or physical activity. Antenatally, women with intended pregnancies were more likely to report healthier diets, lower caffeine intake and higher physical activity. Insufficient studies were available to conduct subgroup comparisons for prospective/retrospective assessment.Discussion: Pregnancy intentions were not associated with preconception diet or physical activity behaviours. In contrast, antenatally, women with intended pregnancies demonstrated better diet and physical activity behaviours. Given the small number of studies available for meta-analyses, further research is needed to consolidate our findings. Meanwhile, health professionals can assess women’s pregnancy intentions during preconception and pregnancy and encourage a healthy lifestyle.PROSPERO registration number CRD42018107854.

Effects of Caffeine Supplementation on Physical Performance of Soccer Players: Systematic Review and Meta-Analysis

2021 ◽  
pp. 194173812199871
Author(s):  
Raphael Einsfeld Simões Ferreira ◽  
Rafael Leite Pacheco ◽  
Carolina de Oliveira Cruz Latorraca ◽  
Rachel Riera ◽  
Ricardo Guilherme Eid ◽  
...  
Keyword(s):  
Systematic Review ◽  
Methodological Quality ◽  
Perceived Exertion ◽  
Randomized Clinical Trials ◽  
Data Extraction ◽  
Meta Analysis ◽  
Risk Of Bias ◽  
Rating Of Perceived Exertion ◽  
Soccer Players ◽  
Meta Analyses

Context: Caffeine is 1 of the most popular supplements consumed by athletes, and the evidence for improving soccer performance remains limited. Objective: To investigate and update the effects (benefits and harms) of caffeine to improve performance on soccer players. Data Sources: Electronic search in Medline (via PubMed), CENTRAL, Embase, SPORTDiscus, and LILACS, from inception to March 28, 2020. Study Selection: Randomized clinical trials (RCTs) assessing the effects of caffeine on the performance of soccer players. Study Design: Systematic review with meta-analysis. Level of Evidence: Level 1. Data Extraction: Data extraction was conducted independently by 2 authors using a piloted form. We assessed methodological quality (Cochrane risk-of-bias [RoB] table) and the certainty of the evidence (GRADE [Grading of Recommendations Assessment, Development and Evaluation] approach). Results: Sixteen RCTs were included. Overall methodological quality was classified as unclear to low risk of bias. When assessing aerobic endurance, meta-analyses did not demonstrate the differences between caffeine and placebo (mean difference [MD], 44.9 m; 95% confidence interval [CI], −77.7 to 167.6). Similarly, no difference was observed during time to fatigue test (MD, 169.8 seconds; 95% CI, −71.8 to 411.6). Considering anaerobic power, meta-analyses also did not find differences for vertical jump (MD, 1.01 cm; 95% CI, −0.68 to 2.69) and repeated sprint tests (MD, −0.02 seconds; 95% CI, −0.09 to 0.04), as well as reaction time agility test (MD, 0.02 seconds; 95% CI, −0.01 to 0.04) and rating of perceived exertion (MD, 0.16 points; 95% CI, −0.55 to 0.87). Regarding safety, a few minor adverse events were reported. Based on the GRADE approach, the certainty of this evidence was classified as very low to low. Conclusions: We found no significant improvement in soccer-related performance with caffeine compared with placebo or no intervention. However, caffeine appears to be safe.

Physique Anxiety and Disordered Eating Correlates in Female Athletes: Differences in Team and Individual Sports

2009 ◽  
Vol 3 (3) ◽  
pp. 218-231 ◽  
Author(s):  
Anne M. Haase
Keyword(s):  
Disordered Eating ◽  
Female Athletes ◽  
Team Sports ◽  
Team Sport ◽  
Social Physique Anxiety ◽  
Social Evaluation ◽  
Bulimic Symptoms ◽  
Sport Type ◽  
Bulimic Symptom ◽  
Individual Sports

As female athletes participating in physique-salient sports report similar levels of social physique anxiety (SPA) and disordered eating symptoms compared with those in nonphysique salient sports, alternative factors contributing to disordered eating require consideration, specifically participation in sport type (team vs. individual). This study examined SPA and disordered eating correlates in female athletes (N= 137) in two sport types (team sports and individual sports). Individual sport athletes exhibited higher SPA,F(1, 135) = 22.03,p< .001; dieting, Brown and Forsythe’sF(1, 57.05) = 43.79,p< .001; and bulimic behavior, Brown and Forsythe’sF(1, 59.92) = 13.45,p= .001 than team sport athletes. SPA and sport type together predicted 44% of dieting and 22% of bulimic symptom variance, suggesting that individual-sport athletes with higher SPA experienced greater disordered eating. Involvement in individual sports where physique is more open to social evaluation may contribute to dieting and bulimic symptoms among female athletes.

scholarly journals The Effect of Chair-Based Exercise on Physical Function in Older Adults: A Systematic Review and Meta-Analysis

2021 ◽  
Vol 18 (4) ◽  
pp. 1902
Author(s):  
Natalie Klempel ◽  
Nicole E. Blackburn ◽  
Ilona L. McMullan ◽  
Jason J. Wilson ◽  
Lee Smith ◽  
...  
Keyword(s):  
Physical Activity ◽  
Systematic Review ◽  
Older Adults ◽  
Physical Function ◽  
Handgrip Strength ◽  
Meta Analysis ◽  
Later Life ◽  
Risk Of Bias ◽  
Exercise Programmes ◽  
The Impact

Physical activity is an important determinant of health in later life. The public health restrictions in response to COVID-19 have interrupted habitual physical activity behaviours in older adults. In response, numerous exercise programmes have been developed for older adults, many involving chair-based exercise. The aim of this systematic review was to synthesise the effects of chair-based exercise on the health of older adults. Ovid Medline, EMBASE, CINAHL, AMED, PyscInfo and SPORTDiscus databases were searched from inception to 1 April 2020. Chair-based exercise programmes in adults ≥50 years, lasting for at least 2 weeks and measuring the impact on physical function were included. Risk of bias of included studies were assessed using Cochrane risk of bias tool v2. Intervention content was described using TiDieR Criteria. Where sufficient studies (≥3 studies) reported data on an outcome, a random effects meta-analysis was performed. In total, 25 studies were included, with 19 studies in the meta-analyses. Seventeen studies had a low risk of bias and five had a high risk of bias. In this systematic review including 1388 participants, results demonstrated that chair-based exercise programmes improve upper extremity (handgrip strength: MD = 2.10; 95% CI = 0.76, 3.43 and 30 s arm curl test: MD = 2.82; 95% CI = 1.34, 4.31) and lower extremity function (30 s chair stand: MD 2.25; 95% CI = 0.64, 3.86). The findings suggest that chair-based exercises are effective and should be promoted as simple and easily implemented activities to maintain and develop strength for older adults.

scholarly journals Sarcopenia is associated with hypertension in older adults: a systematic review and meta-analysis

2020 ◽  
Author(s):  
Tingting Bai ◽  
Fang Fang ◽  
Feika Li ◽  
Yan Ren ◽  
Jiaan Hu ◽  
...  
Keyword(s):  
Systematic Review ◽  
Older Adults ◽  
Confidence Interval ◽  
Old Age ◽  
Handgrip Strength ◽  
Meta Analysis ◽  
Cochrane Library ◽  
Original Research ◽  
Inclusion Criteria ◽  
Asian Group

Abstract Background: Sarcopenia and handgrip strength have been observed and correlated in association with hypertension among the old-age people. However, the results reported in different studies were inconsistent. In the current study, we conducted a systematic review and meta-analysis to reveal the significant association between sarcopenia, handgrip strength, and hypertension in older adults. Methods: PubMed, MEDLINE, Cochrane Library, and EMBASE databases were searched from inception to 15 November, 2019 to retrieve the original research studies that addressed the association between sarcopenia, handgrip strength, and hypertension. All the relevant data were retrieved, analyzed, and summarized. Results: 19 studies met the inclusion criteria and a total of 21301 participants were included in the meta-analysis. Eight eligible studies have reported the odd ratios (ORs) of hypertension and the ORs ranged from 0.41 to 4.38. When pooled the ORs together, the summarized ORs was 1.29 [95% confidence interval (CI) =1.00-1.67]. The summarized ORs for the Asian group 1.50 (95% CI=1.35-1.67) was significantly higher than that of Caucasian group 1.08 (95% CI=0.39-2.97). Eleven studies have provided the data on association between handgrip strength and hypertension. The overall ORs and 95% CI was 0.99 (95% CI=0.80-1.23), showing no significant association. Conclusion: Sarcopenia was associated with hypertension, but no correlation was found between handgrip strength and hypertension in older adults.

scholarly journals Combined but Not Isolated Ingestion of Caffeine and Taurine Improves Wingate Sprint Performance in Female Team-Sport Athletes Habituated to Caffeine

Sports ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 162
Author(s):  
Raci Karayigit ◽  
Alireza Naderi ◽  
Bryan Saunders ◽  
Scott C. Forbes ◽  
Juan Del Coso ◽  
...  
Keyword(s):  
Heart Rate ◽  
Body Mass ◽  
Perceived Exertion ◽  
Female Athletes ◽  
Team Sport ◽  
Mean Power ◽  
Wingate Anaerobic Test ◽  
Double Blind ◽  
Experimental Trials ◽  
Anaerobic Test

Previous studies have investigated caffeine (CAF) and taurine (TAU) in isolation and combined during exercise in males. However, the potential synergistic effect during high-intensity exercise remains unknown in female athletes. Seventeen female team-sport athletes participated (age: 23.4 ± 2.1 years; height: 1.68 ± 0.05 m; body mass: 59.5 ± 2.2 kg). All participants were habitual caffeine consumers (340.1 ± 28.6 mg/day). A double-blind randomized crossover design was used. Participants completed four experimental trials: (i) CAF and TAU (6 mg/kg body mass of CAF + 1 g of TAU), (ii) CAF alone; (iii) TAU alone; and (iv) placebo (PLA). Supplements were ingested 60 min before a 30-s Wingate Anaerobic Test (WAnT). Heart rate and blood lactate (BL) were measured before and immediately after the WAnT; and ratings of perceived exertion (RPE) were recorded immediately after the WAnT. Peak power (PP) was significantly higher following co-ingestion of CAF+TAU compared to PLA (p = 0.03) and TAU (p = 0.03). Mean power (MP) was significantly higher following co-ingestion of CAF+TAU compared to PLA (p = 0.01). No other differences were found between conditions for PP and MP (p > 0.05). There were also no observed differences in fatigue index (FI), BL; heart rate; and RPE between conditions (p > 0.05). In conclusion, compared to PLA the combined ingestion of 6 mg/kg of CAF and 1 g of TAU improved both PP and MP in female athletes habituated to caffeine; however; CAF and TAU independently failed to augment WAnT performance.

scholarly journals Postmatch recovery of physical performance and biochemical markers in team ball sports: a systematic review

2018 ◽  
Vol 4 (1) ◽  
pp. e000264 ◽  
Author(s):  
Steven H Doeven ◽  
Michel S Brink ◽  
Silke J Kosse ◽  
Koen A P M Lemmink
Keyword(s):  
Systematic Review ◽  
Physical Performance ◽  
Biochemical Markers ◽  
Recovery Time ◽  
Team Sports ◽  
Current Evidence ◽  
Original Research ◽  
Eligibility Criteria ◽  
Increased Risk ◽  
Time Courses

BackgroundInsufficient postmatch recovery in elite players may cause an increased risk of injuries, illnesses and non-functional over-reaching.ObjectiveTo evaluate postmatch recovery time courses of physical performance and biochemical markers in team ball sport players.Study designSystematic review.Data sourcesPubMed and Web of Science.Eligibility criteria for selecting studiesThis systematic review was conducted according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. The Critical Review Form for Quantitative Studies was used to evaluate quality. Studies were included if they met the following criteria: (1) original research evaluated players’ physical recovery postmatch; (2) team/intermittent sports; and (3) at least two postmeasurements were compared with baseline values.ResultsTwenty-eight studies were eligible. Mean methodological quality was 11.2±1.11. Most used performance tests and biochemical markers were the countermovement jump test, sprint tests and creatine kinase (CK), cortisol (C) and testosterone (T), respectively.Summary/conclusionsThe current evidence demonstrates that underlying mechanisms of muscle recovery are still in progress while performance recovery is already reached. CK recovery time courses are up to ≥72 hours. Soccer and rugby players need more time to recover for sprint performance, CK and C in comparison to other team ball sports. There are more high-quality studies needed regarding recovery in various team sports and recovery strategies on an individual level should be evaluated.Clinical relevanceOngoing insufficient recovery can be prevented by the use of the presented recovery time courses as specific practical recovery guidelines.

scholarly journals Caffeine Supplementation and Physical Performance, Muscle Damage and Perception of Fatigue in Soccer Players: A Systematic Review

Nutrients ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 440 ◽  
Author(s):  
Juan Mielgo-Ayuso ◽  
Julio Calleja-Gonzalez ◽  
Juan Del Coso ◽  
Aritz Urdampilleta ◽  
Patxi León-Guereño ◽  
...  
Keyword(s):  
Systematic Review ◽  
Muscle Damage ◽  
Physical Performance ◽  
Perceived Exertion ◽  
Serum Markers ◽  
Soccer Players ◽  
Caffeine Intake ◽  
Moderate Dose ◽  
Jump Performance ◽  
The Impact

Soccer is a complex team sport and success in this discipline depends on different factors such as physical fitness, player technique and team tactics, among others. In the last few years, several studies have described the impact of caffeine intake on soccer physical performance, but the results of these investigations have not been properly reviewed and summarized. The main objective of this review was to evaluate critically the effectiveness of a moderate dose of caffeine on soccer physical performance. A structured search was carried out following the Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) guidelines in the Medline/PubMed and Web of Science databases from January 2007 to November 2018. The search included studies with a cross-over and randomized experimental design in which the intake of caffeine (either from caffeinated drinks or pills) was compared to an identical placebo situation. There were no filters applied to the soccer players’ level, gender or age. This review included 17 articles that investigated the effects of caffeine on soccer-specific abilities (n = 12) or on muscle damage (n = 5). The review concluded that 5 investigations (100% of the number of investigations on this topic) had found ergogenic effects of caffeine on jump performance, 4 (100%) on repeated sprint ability and 2 (100%) on running distance during a simulated soccer game. However, only 1 investigation (25%) found as an effect of caffeine to increase serum markers of muscle damage, while no investigation reported an effect of caffeine to reduce perceived fatigue after soccer practice. In conclusion, a single and moderate dose of caffeine, ingested 5–60 min before a soccer practice, might produce valuable improvements in certain abilities related to enhanced soccer physical performance. However, caffeine does not seem to cause increased markers of muscle damage or changes in perceived exertion during soccer practice.

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