Functional and cognitive responses to caffeine intake in middle-aged women are dose depending

Waer, Fatma Ben; Laatar, Rabeb; Jouira, Ghada; Srihi, Selim; Rebai, Haithem; Sahli, Sonia

doi:10.1016/j.bbr.2020.112956

Cited by 15 publications

(16 citation statements)

References 70 publications

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“…In the primary search, there was a total of 1214 results; 1184 documents were excluded after reading the title or abstract ( Figure 1 ). After reading 30 full-text papers, 7 studies were found that satisfied the inclusion criteria [ 7 , 10 , 11 , 15 , 16 , 17 , 18 ]. In the secondary search, there were 669 search results, and one study was additionally included [ 19 ].…”

Section: Resultsmentioning

confidence: 99%

“…In the secondary search, there were 669 search results, and one study was additionally included [ 19 ]. Therefore, we included a total of 8 studies in the present review [ 7 , 10 , 11 , 15 , 16 , 17 , 18 , 19 ].…”

Section: Resultsmentioning

confidence: 99%

“…For one study [ 15 ] that presented the data in the form of figures, the Web Plot Digitizer software ( , accessed on 26 May 2021) was used to extract the necessary data. Standard errors (SEs) presented in one study [ 18 ] were converted to standard deviation (SD).…”

Section: Methodsmentioning

confidence: 99%

“…The included studies did not present inter-trial correlation, and therefore, correlation values were estimated as suggested in the Cochrane Handbook [ 25 ]. Some studies evaluated performance under multiple caffeine conditions [ 10 , 15 , 18 , 19 ]. To account for these correlated effects within the same study, we first calculated SMDs and variances for each comparison and then used the average values in the main analysis.…”

Section: Methodsmentioning

confidence: 99%

“…However, out of the 10 studies included in that review, only 3 and 2 studies focused on muscular strength and muscular endurance outcomes, respectively. In recent years, the interest in determining the ergogenic effect of caffeine in women has increased and several primary studies examined the effects of caffeine on muscular endurance and muscular strength in this population [ 15 , 16 , 17 , 18 , 19 ]. Accordingly, it is an opportune time to summarize their findings in a meta-analysis.…”

Section: Introductionmentioning

confidence: 99%

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Ergogenic Effects of Acute Caffeine Intake on Muscular Endurance and Muscular Strength in Women: A Meta-Analysis

Grgić

Coso

2021

IJERPH

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This meta-analysis aimed to explore the effects of caffeine ingestion on muscular endurance and muscular strength in women. Five databases were searched to find relevant studies. A random-effects meta-analysis of standardized mean differences (SMD) was performed for data analysis. Subgroup meta-analyses explored the effects of caffeine on upper-body and lower-body muscular endurance and muscular strength. Eight crossover placebo-controlled studies were included in the review. In the main meta-analysis that considered data from all included studies, there was a significant ergogenic effect of caffeine on muscular endurance (SMD = 0.25; p = 0.027) and muscular strength (SMD = 0.18; p < 0.001). In a subgroup analysis that considered only upper-body exercises, there was a significant ergogenic effect of caffeine on muscular endurance (SMD = 0.20; p = 0.007) and muscular strength (SMD = 0.17; p < 0.001). In a subgroup analysis that considered only lower-body exercises, there was no significant difference between caffeine and placebo for muscular endurance (SMD = 0.43; p = 0.092) or muscular strength (SMD = 0.16; p = 0.109). The main finding of this meta-analysis is that caffeine ingestion has a significant ergogenic effect on muscular endurance and muscular strength in women. The effects reported in this analysis are similar to those previously observed in men and suggest that women may use caffeine supplementation as an ergogenic aid for muscular performance. Future research is needed to explore the effects of caffeine on lower-body muscular endurance and muscular strength in this population.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Ergogenic Effects of Acute Caffeine Intake on Muscular Endurance and Muscular Strength in Women: A Meta-Analysis

Grgić

Coso

2021

IJERPH

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Effects of Caffeine on Resistance Exercise: A Review of Recent Research

Grgić

2021

Sports Med

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In the last few years, a plethora of studies have explored the effects of caffeine on resistance exercise, demonstrating that this field of research is growing fast. This review evaluates and summarizes the most recent findings. Given that toxic doses of caffeine are needed to increase skeletal muscle contractility, the binding of caffeine to adenosine receptors is likely the primary mechanism for caffeine's ergogenic effects on resistance exercise. There is convincing evidence that caffeine ingestion is ergogenic for (i) one-repetition maximum, isometric, and isokinetic strength; and (ii) muscular endurance, velocity, and power in different resistance exercises, loads, and set protocols. Furthermore, there is some evidence that caffeine supplementation also may enhance adaptations to resistance training, such as gains in strength and power. Caffeine ingestion is ergogenic for resistance exercise performance in females, and the magnitude of these effects seems to be similar to that observed in men. Habitual caffeine intake and polymorphisms within CYP1A2 and ADORA2A do not seem to modulate caffeine's ergogenic effects on resistance exercise. Consuming lower doses of caffeine (e.g., 2-3 mg/kg) appears to be comparably ergogenic to consuming high doses of caffeine (e.g., 6 mg/kg). Minimal effective doses of caffeine seem to be around 1.5 mg/kg. Alternate caffeine sources such as caffeinated chewing gum, gel, and coffee are also ergogenic for resistance exercise performance. With caffeine capsules, the optimal timing of ingestion seems to be 30-60 min before exercise. Caffeinated chewing gums and gels may enhance resistance exercise performance even when consumed 10 min before exercise. It appears that caffeine improves performance in resistance exercise primarily due to its physiological effects. Nevertheless, a small portion of the ergogenic effect of caffeine seems to be placebo-driven.

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Can sensors be used to measure the Arm Curl Test results? a systematic review

Matos,

Vornicoglo,

Coelho

et al. 2024

Discov Appl Sci

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There is growing interest in the automated measurement of physical fitness tests, such as the Arm Curl Test, to enable more objective and accurate assessments. This review aimed to systematically analyze the types of sensors and technological methods used for automated Arm Curl Test measurement and their benefits for different populations. The search consisted of the search related to the possibilities to measure the Arm Curl Test results with sensors in scientific databases, including PubMed Central, IEEE Explore, Elsevier, Springer, MDPI, ACM, and PMC, published from January 2010 to October 2022. The analysis included 30 studies from 15 nations with diverse populations analyzed. According to data extraction, the most prevalent sensors were chronometers, accelerometers, stadiometers, and dynamometers. In the investigations, statistical analysis predominated. The study shows how automated sensor technologies can objectively measure the Arm Curl Test. The detected sensors combined with statistical analysis techniques can enhance assessments. Applications for the Arm Curl Test may be improved even more with more research on cutting-edge sensors and algorithms. This evaluation offers insightful information about utilizing sensor-based automation to enhance Arm Curl Testing.

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Functional and cognitive responses to caffeine intake in middle-aged women are dose depending

Cited by 15 publications

References 70 publications

Ergogenic Effects of Acute Caffeine Intake on Muscular Endurance and Muscular Strength in Women: A Meta-Analysis

Ergogenic Effects of Acute Caffeine Intake on Muscular Endurance and Muscular Strength in Women: A Meta-Analysis

Effects of Caffeine on Resistance Exercise: A Review of Recent Research

Can sensors be used to measure the Arm Curl Test results? a systematic review

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