All of the following factors can increase resting metabolic rate, EXCEPT:

Resting metabolic rate (RMR) refers to the number of calories the body burns while at rest, which is influenced by various factors including muscle mass, age, gender, and dietary habits.

Eating fibrous vegetables can increase RMR due to their high thermic effect, as digesting and metabolizing food generally requires energy. This thermogenic effect slightly boosts metabolism.

High-intensity exercise is known to significantly elevate RMR. Not only does it increase calorie expenditure during activity, but it also contributes to afterburn effects, whereby the body continues to burn calories at an elevated rate post-exercise.

Eating small meals can also help boost RMR. Consuming smaller, more frequent meals may keep the metabolic rate elevated more consistently throughout the day, in part because the body uses energy to digest, absorb, and metabolize food.

In contrast, while increasing carbohydrate intake can be beneficial for energy levels and performance, it does not inherently increase RMR. The body will burn carbohydrates for energy efficiently, but the direct impact on resting metabolic rate is minimal compared to factors like exercise intensity or meal frequency. Therefore, increasing carbohydrate intake does not actively enhance the metabolic rate at rest as the other factors do.