Fats providing a sustained energy source are described as being what?

Fats are characterized as a slow-burning energy source due to their composition and metabolic process. Unlike carbohydrates, which can be rapidly metabolized to provide quick energy, fats undergo a more complex digestion and conversion process. This slower metabolic rate allows fats to release energy gradually over a longer period, making them an ideal fuel source for endurance activities and sustained energy needs.

In endurance sports or prolonged physical activities, the body efficiently uses fat reserves once glycogen stores (the quicker source of energy from carbohydrates) are depleted. This characteristic of fats helps maintain energy levels and keeps the body fueled without the spikes and crashes associated with faster-burning energy sources. Hence, describing fats as "slow-burning" accurately reflects their role in providing a steady and prolonged energy supply.