Processed foods can have negative effects on overall fitness and health due to their typically high content of added sugars, unhealthy fats, and sodium. These components can lead to weight gain and increase the risk of chronic conditions such as heart disease and diabetes. Additionally, processed foods often lack essential nutrients and fiber, which are vital for maintaining energy levels and digestive health. Regular consumption of these foods can disrupt metabolism and leave individuals feeling less satiated, making it harder to manage weight effectively.