Which substrate(s)is/are primarily used to fuel exercise below 60% VO2 max?

Question

Which substrate(s)is/are primarily used to fuel exercise below 60% VO2 max?​

Quizplus · Accepted Answer

During exercise below 60% VO2 max, the body primarily uses fatty acids as the substrate for fuel. This is because the intensity of the exercise is relatively low and the body is able to rely on its slower but more efficient aerobic energy system to supply energy to the muscles. Fatty acids are also a plentiful source of energy, with the body having stores of fat that can be broken down and used by the muscles for fuel. While glucose is still used during exercise, it is not the primary fuel source during low-intensity exercise. Creatine phosphate is used as an immediate energy source for high-intensity activities like weight lifting or sprinting, but is not the primary fuel source for lower intensity activities.

Which Substrate(s)is/are Primarily Used to Fuel Exercise Below 60% VO2