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The benefits of caffeine in rugby

Richard Chessor
Article written by Richard Chessor

Date published 18 July 2019

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Caffeine is a popular work-enhancing supplement that has been widely researched in the sport and exercise environment.

Caffeine is an adenosine antagonist, meaning it blocks the action of adenosine in the central nervous system (CNS). Adenosine has the impact of increasing pain perception and inducing sedation and relaxation, which are generally counter-productive to exercise performance.

Through its adenosine antagonist action, caffeine has been shown to support exercise performance via reduced perception of the effort, fatigue or pain associated with exercise.

One of the key areas of interest to athletes is perhaps caffeine's effect on cognitive function. Research indicates improvements in a range of cognitive tests, including memory tests, psychomotor tasks (e.g. decision making and reaction tasks) and attention tasks following strenuous exercise.

If cognitive function in these areas can be maintained under fatigue, this is of clear relevance to the athlete, where critical decision making is important for success late in an event or game. Further to cognitive function, skill execution under fatigue may also be maintained with use of caffeine.

Another benefit of caffeine is a reduction in perception of effort during exercise. This reduction may allow athletes to work at a greater intensity or prolong the duration of exercise, which may be especially important in endurance exercise.

Read more: Caffeine for athletes: all you need to know

Performance Nutritionist Nigel Mitchell discusses the use of caffeine in sport, covering the benefits, recommended dosage and any precautions to take.


Read more

Ergogenic (performance-enhancing) effects have been demonstrated from a wide range of dosages (~3-9mg/kg body mass) and across different forms (e.g. anhydrous powder, coffee, energy drinks, gels, gum…). This provides the user considerable flexibility with their protocol.

However, it should be noted that there is significant individual variability in caffeine metabolism and this should be acknowledged when trialling caffeine use to ensure the optimal protocol can be established. Over consumption of caffeine may not only negate the ergogenic effect but also cause gastrointestinal upset, nervousness, mental confusion and an inability to focus.

At Scottish Rugby, we regularly use caffeine to support and enhance both training and match performances. Caffeine in different formats is made available prior to key training sessions (typically afternoon rugby sessions) and before matches. The nutrition team works with the players to identify their optimal caffeine strategy.

Intakes <3mg/kg are generally recommended but this is individualised as best as possible with consideration of the players habitual caffeine intake (e.g. through coffee and tea) and performance feedback. Caffeine tablets/capsules are often the preferred format as they allow for fast absorption without unwanted tastes or the requirement of gastric load that accompanies energy drinks and caffeine gels.

For more information on caffeine and exercise performance see:

Elite caffeine range on black background

From tablets to effervescent drinks to energy gels and gum, the Elite caffeine range has plenty of convenient ways to get your caffeine dose.

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Richard Chessor

About Richard Chessor

Richard Chessor MSc became a performance nutritionist for British Swimming in 2016, following eight years as lead nutritionist for Scottish Rugby.