Creatine acts directly on cellular energy production by increasing phosphocreatine reserves in the muscle, which allows for faster resynthesis of ATP, the central molecule involved in energy production. In fact, ATP can be considered the body’s “fuel.”
This mechanism therefore improves the ability to perform short, intense, and repeated efforts with a daily intake of 3g of creatine, by facilitating the immediate availability of energy and limiting the accumulation of muscle fatigue associated with hydrogen ions. This increase in work capacity is reflected in particular by improved tolerance to variations in intensity and intermittent exertion. Furthermore, creatine supplementation over several weeks is associated with faster muscle recovery after exercise, along with improved strength, range of motion, and a reduction in the muscle changes observed after exercise.
Additional effects have also been suggested, such as a decrease in oxidative stress, a reduction in certain inflammatory processes, and a potential impact on mitochondrial function, although these mechanisms remain secondary to its primary role in energy production.