FitProven
Evidence Breakdown
Based on 3 studies
Evidence map
For & against, at a glance
Meta-Analysis
Pro
Grgic J et al. · 2020British Journal of Sports MedicineUmbrella review of 21 meta-analyses covering endurance, strength, power, and sport-specific performance. Caffeine was found to improve muscle strength (ES: 0.20), muscle endurance (ES: 0.28), aerobic endurance (ES: 0.22-0.45), and anaerobic power. The evidence was consistent across meta-analyses, establishing caffeine as one of the most well-supported ergogenic supplements.
0.95
Umbrella review of 21 meta-analyses covering endurance, strength, power, and sport-specific performance. Caffeine was found to improve muscle strength (ES: 0.20), muscle endurance (ES: 0.28), aerobic endurance (ES: 0.22-0.45), and anaerobic power. The evidence was consistent across meta-analyses, establishing caffeine as one of the most well-supported ergogenic supplements.
Design Meta-Analysis (1.0) × quality 0.95 = impact 0.95
View sourceMeta-Analysis
Pro
Southward K et al. · 2018British Journal of Sports MedicineMeta-analysis of 46 studies examining caffeine's effects on endurance performance. Caffeine improved endurance time-trial performance by 2.22% (95% CI: 0.98-3.45%) and mean power output by 2.92%. Effects were consistent across cycling, running, and rowing modalities. The optimal dose was identified as 3-6 mg/kg body weight consumed 30-75 minutes before exercise.
0.92
Meta-analysis of 46 studies examining caffeine's effects on endurance performance. Caffeine improved endurance time-trial performance by 2.22% (95% CI: 0.98-3.45%) and mean power output by 2.92%. Effects were consistent across cycling, running, and rowing modalities. The optimal dose was identified as 3-6 mg/kg body weight consumed 30-75 minutes before exercise.
Design Meta-Analysis (1.0) × quality 0.92 = impact 0.92
View sourceMeta-Analysis
Pro
Grgic J et al. · 2019Journal of the International Society of Sports NutritionMeta-analysis of 10 studies examining caffeine's effects on maximal muscle strength (1RM). Caffeine supplementation produced significant improvements in upper body strength (ES: 0.21) and lower body strength (ES: 0.15). The authors concluded that caffeine is an effective ergogenic aid for maximal strength performance, though the effect size is small to moderate.
0.90
Meta-analysis of 10 studies examining caffeine's effects on maximal muscle strength (1RM). Caffeine supplementation produced significant improvements in upper body strength (ES: 0.21) and lower body strength (ES: 0.15). The authors concluded that caffeine is an effective ergogenic aid for maximal strength performance, though the effect size is small to moderate.
Design Meta-Analysis (1.0) × quality 0.90 = impact 0.90
View sourceMeta-Analysis
Pro
Grgic J et al. · 2020British Journal of Sports MedicineUmbrella review of 21 meta-analyses covering endurance, strength, power, and sport-specific performance. Caffeine was found to improve muscle strength (ES: 0.20), muscle endurance (ES: 0.28), aerobic endurance (ES: 0.22-0.45), and anaerobic power. The evidence was consistent across meta-analyses, establishing caffeine as one of the most well-supported ergogenic supplements.
0.95
Umbrella review of 21 meta-analyses covering endurance, strength, power, and sport-specific performance. Caffeine was found to improve muscle strength (ES: 0.20), muscle endurance (ES: 0.28), aerobic endurance (ES: 0.22-0.45), and anaerobic power. The evidence was consistent across meta-analyses, establishing caffeine as one of the most well-supported ergogenic supplements.
Design Meta-Analysis (1.0) × quality 0.95 = impact 0.95
View sourceMeta-Analysis
Pro
Southward K et al. · 2018British Journal of Sports MedicineMeta-analysis of 46 studies examining caffeine's effects on endurance performance. Caffeine improved endurance time-trial performance by 2.22% (95% CI: 0.98-3.45%) and mean power output by 2.92%. Effects were consistent across cycling, running, and rowing modalities. The optimal dose was identified as 3-6 mg/kg body weight consumed 30-75 minutes before exercise.
0.92
Meta-analysis of 46 studies examining caffeine's effects on endurance performance. Caffeine improved endurance time-trial performance by 2.22% (95% CI: 0.98-3.45%) and mean power output by 2.92%. Effects were consistent across cycling, running, and rowing modalities. The optimal dose was identified as 3-6 mg/kg body weight consumed 30-75 minutes before exercise.
Design Meta-Analysis (1.0) × quality 0.92 = impact 0.92
View sourceMeta-Analysis
Pro
Grgic J et al. · 2019Journal of the International Society of Sports NutritionMeta-analysis of 10 studies examining caffeine's effects on maximal muscle strength (1RM). Caffeine supplementation produced significant improvements in upper body strength (ES: 0.21) and lower body strength (ES: 0.15). The authors concluded that caffeine is an effective ergogenic aid for maximal strength performance, though the effect size is small to moderate.
0.90
Meta-analysis of 10 studies examining caffeine's effects on maximal muscle strength (1RM). Caffeine supplementation produced significant improvements in upper body strength (ES: 0.21) and lower body strength (ES: 0.15). The authors concluded that caffeine is an effective ergogenic aid for maximal strength performance, though the effect size is small to moderate.
Design Meta-Analysis (1.0) × quality 0.90 = impact 0.90
View sourceTap any node to expand its detail.
Evidence
PRO (3)
PRO Meta-Analysis 0.95 Grgic J, Grgic I et al. (2020)
Umbrella review of 21 meta-analyses covering endurance, strength, power, and sport-specific performance. Caffeine was found to improve muscle strength (ES: 0.20), muscle endurance (ES: 0.28), aerobic endurance (ES: 0.22-0.45), and anaerobic power. The evidence was consistent across meta-analyses, establishing caffeine as one of the most well-supported ergogenic supplements.
British Journal of Sports Medicine
PRO Meta-Analysis 0.92 Southward K, Rutherfurd-Markwick KJ et al. (2018)
Meta-analysis of 46 studies examining caffeine's effects on endurance performance. Caffeine improved endurance time-trial performance by 2.22% (95% CI: 0.98-3.45%) and mean power output by 2.92%. Effects were consistent across cycling, running, and rowing modalities. The optimal dose was identified as 3-6 mg/kg body weight consumed 30-75 minutes before exercise.
British Journal of Sports Medicine
PRO Meta-Analysis 0.90 Grgic J, Trexler ET et al. (2019)
Meta-analysis of 10 studies examining caffeine's effects on maximal muscle strength (1RM). Caffeine supplementation produced significant improvements in upper body strength (ES: 0.21) and lower body strength (ES: 0.15). The authors concluded that caffeine is an effective ergogenic aid for maximal strength performance, though the effect size is small to moderate.
Journal of the International Society of Sports Nutrition