Fatty acids Fatty acids are the primary energy source during low-intensity activity. With fat reserves in the body being almost unlimited, low-intensity activities are able to continue for a long time.
What energy system is used during low intensity exercise?
The aerobic system The aerobic system provides energy for low to medium-intensity activities that last anywhere from two minutes to a few hours. Any sport that has repeated shifts, rallies, events, or sustained exercise, such as long distance swimming, crew (rowing) and kayaking rely on the aerobic system.
What provides the majority of energy at very low intensity exercise?
During low intensity exercise, glycogen breakdown and thus glycolysis is not markedly stimulated, so the increased availability of fatty acids allows their oxidation to serve as the predominant energy source.
What is the main source of ATP during low intensity workouts?
The oxidative system, the primary source of ATP at rest and during low-intensity activities, uses primarily carbohydrates and fats as substrates. Following the onset of activity, as the intensity of exercise increases, there is a shift in substrate preference from fats to carbohydrates.
What source of fuel is used by the body during low intensity exercise quizlet?
During low-intensity exercise, plasma free fatty acids are the primary source of fat energy. Furthermore, as the duration of the exercise increases, there is a progressive rise in the role of plasma free fatty acids as a fuel source.
What is the energy source for intensity exercise?
Physical Activity Intensity and Fuel Use
|30 sec – 3 min
|3 min – 20 min
|Low to moderate