A review of several studies looked at how taking caffeine right before a game affects rugby players. The researchers analyzed factors like sprinting speed, passing accuracy, and how hard the athletes felt they were working during their performance.
The findings showed that caffeine led to small improvements in sprint performance and a large improvement in passing accuracy. It also helped players feel less exhausted by lowering their perceived exertion levels. However, the study did not find any significant changes in jumping performance, strength, or metabolic and hormonal markers.
It is important to note that the evidence for these results is considered low to very low certainty. Some findings regarding passing accuracy were based on a diverse range of studies with high variability. Because the data is limited, these results should be viewed as preliminary rather than a definitive rule for all athletes.
Common questions
Does caffeine help with rugby performance?
The study found that acute caffeine supplementation can lead to small improvements in sprint performance and a large improvement in passing accuracy. It also helped reduce the rating of perceived exertion, meaning players may feel like they are working less hard during intense physical activity.
Does caffeine improve strength or jumping?
The analysis did not find any significant effects on jumping performance or strength performance for rugby players. Additionally, no significant changes were observed in metabolic markers or hormonal markers following caffeine intake.
How reliable are these findings?
The certainty of the evidence is currently rated as low to very low. Some results, specifically regarding passing accuracy, showed high heterogeneity and potential small-study effects. These factors mean the results should be viewed with caution by athletes and coaches.
