ACE Personal Trainer Practice Exam

How many calories does protein provide per gram?

1. 4 calories

2. 7 calories

3. 9 calories

4. 2 calories

The correct answer is: 4 calories

Protein provides 4 calories per gram, which is a fundamental principle in nutrition. This energy value is crucial for personal trainers and nutritionists as they develop dietary recommendations and meal plans for their clients. Understanding the caloric contribution of protein is essential when considering macronutrient distribution. While fats provide 9 calories per gram and carbohydrates also offer 4 calories per gram, protein's role extends beyond just providing energy; it is vital for muscle repair, growth, and overall bodily functions. The other options represent different macronutrients: fats contribute the highest calorie content, and carbohydrates match protein in terms of caloric content per gram. However, the distinct energy provision of protein at 4 calories is a key aspect in designing balanced diets that support various fitness goals, particularly those centered around muscle maintenance and bodybuilding.