Impact of Dietary Fat and Endurance Running on Intramuscular Lipid Stores

This study focuses on understanding how diet and endurance running affect fat stores within muscles, using a technique called 1 H Magnetic Resonance Spectroscopy (MRS). The research involves endurance-trained athletes and aims to explore how a prolonged running session impacts these fat stores, and how they replenish afterwards when following either a low-fat or moderate-fat diet. The importance of this study lies in its potential to shed light on how dietary fat influences the health and performance of individuals engaged in intense physical training. The findings could also contribute to obesity research, helping to understand relationships between muscle fat stores, insulin resistance, and obesity. Participants in this study are endurance athletes who will undergo a 2-hour training run. After this, they will follow two different diets - one with very low fat content (10% of energy from fat) and another with moderate fat content (35% of energy from fat). The order of the diets is randomly assigned. The study measures the change in muscle fat stores after the run and during recovery, while following each diet. The researchers believe that prolonged exercise will decrease muscle fat stores, and that a low-fat diet may slow down their replenishment compared to a moderate-fat diet.