What is a significant effect of caffeine on physical performance?

Caffeine is known to significantly enhance physical performance, particularly in endurance activities. This stimulant works by elevating adrenaline levels in the body, which can lead to improved energy availability and better physical output. It also promotes greater fat oxidation, allowing the body to use fat as a source of energy more efficiently during prolonged exercise.

Additionally, caffeine can enhance focus and concentration, which is vital for both training and competitive scenarios. This cognitive boost can result in better decision-making, improved reaction times, and overall mental alertness, helping athletes push through challenges and perform at their best.

The other options do not align with the established effects of caffeine. For instance, it does not generally lead to a significant decrease in heart rate; rather, it can temporarily increase it due to its stimulating effects. Caffeine is also not linked to excessive fatigue; in fact, it is often used to combat feelings of tiredness and fatigue during workouts. Lastly, while recovery is a complex process, caffeine does not interfere negatively with muscle recovery; instead, some studies suggest that it may even aid in the recovery process when consumed strategically.