Alcohol consumption can negatively affect fitness performance in multiple ways. It can lead to dehydration, impair recovery, and decrease strength and endurance. Alcohol also interferes with the body's ability to metabolize nutrients, which can hinder muscle repair and growth. Additionally, excessive alcohol intake can disrupt sleep patterns, affecting recovery and overall energy levels. Even moderate consumption can have detrimental effects on coordination and reaction time, increasing the risk of injury during workouts. Therefore, monitoring alcohol intake is vital for maintaining optimal fitness performance.