Protein needs differ significantly between sedentary individuals and athletes due to activity levels and muscle repair requirements. Sedentary individuals typically require around 0.8 grams of protein per kilogram of body weight to maintain bodily functions. In contrast, athletes need higher amounts, generally ranging from 1.2 to 2.0 grams per kilogram, depending on their specific training intensity and goals. Increased protein intake supports muscle recovery, growth, and adaptation to physical demands. Ensuring adequate protein consumption from diverse sources helps athletes optimize performance and maintain muscle health while reducing the risk of injury.