What outcome does low-glycogen training have on mitochondria?

Low-glycogen training is known to create a physiological environment that promotes adaptations in muscle tissues, specifically regarding mitochondria. When glycogen stores are low, the body adapts by increasing mitochondrial biogenesis, which essentially refers to the growth and division of pre-existing mitochondria. This process enhances the muscle's capacity to produce energy through aerobic metabolism, as more mitochondria mean that muscle cells can generate ATP more efficiently during prolonged exercise, especially in endurance activities.

The outcome of increased size often correlates with the increased function of mitochondria, as larger mitochondria can have more enzymatic activity and are better equipped to support energy needs during activity. This adaptive response is beneficial for endurance athletes, as it supports improved stamina and overall performance.

Consequently, the option that identifies increased size as an outcome of low-glycogen training correctly captures the essence of how low-energy availability can stimulate the growth of mitochondria, setting the stage for enhanced endurance and performance adaptations over time.