Tag: Carbs vs fats

A single gram of fat contains about 9 calories, more than twice the 4 calories found in a gram of carbohydrate or protein. This significant caloric difference is a fundamental distinction, reflecting their differing roles as immediate energy sources versus long-term energy storage within the body.

A gram of fat provides more than double the calories of a gram of carbohydrates—9 calories compared to 4 calories, respectively. However, this simple fact is just the beginning of understanding how your body actually uses these macronutrients for fuel, and the truth is far more nuanced.

Research indicates that carbohydrates are the body's primary fuel source for high-intensity exercise, with most runners needing 50-65% of their daily calories from carbs. So, should runners eat carbs or fats to maximize their performance? This debate is a cornerstone of sports nutrition, with implications for every runner's training and race day.