Youth athletes tend to show a higher oxidation of what substrate compared to adults?

Youth athletes tend to exhibit a higher oxidation of fatty acids compared to adults due to several physiological factors. One key reason is that younger individuals generally have a higher proportion of slow-twitch muscle fibers, which are more efficient at using fat as a fuel source during exercise. This is particularly evident during low to moderate intensity activities, where fatty acids become the preferred substrate for energy.

Additionally, the metabolic systems in youth athletes are often better equipped to mobilize and oxidize fat, resulting in an enhanced ability to use this substrate effectively. As youth athletes develop, their metabolic responses adapt, allowing for a more balanced use of carbohydrates and fats as they grow and become more conditioned.

In contrast, adults tend to rely more on carbohydrates, especially during high-intensity activities, due to their greater availability and quicker conversion to energy. This fundamental difference in substrate utilization underscores the unique metabolic characteristics of youth athletes as they engage in sports and physical activities.