Different types of diets can affect energy levels during workouts, depending on their macronutrient distribution. Diets high in carbohydrates generally provide readily accessible energy for endurance activities, while those emphasizing protein may enhance recovery and strength training performance. Low-carb or ketogenic diets might initially lead to reduced energy during high-intensity workouts, as glycogen is limited. Adequate hydration and nutrient timing are also critical factors in maintaining energy levels. Ultimately, the best diet for an individual may vary based on personal preferences, activity levels, and specific fitness goals.