Question

Briefly explain any two factors determining endurance.

Answer 1

Endurance is the ability to sustain an activity for extended periods of time and usually refers to aerobic ability.

Two factors which determine endurance are:

1. Aerobic capacity: The muscles require energy to perform an activity continuously which can be supplied in the presence of oxygen. The aerobic capacity depends on the following factors:
   1. Oxygen intake
   2. Oxygen transport
   3. Oxygen uptake
   4. Energy reserves
2. Lactic acid tolerance: Lactic acid is produced by muscles during intense exercise. It is a metabolic byproduct that has no bearing on how well you work out. It results in difficulty and muscle tiredness after activity. The capacity to tolerate higher lactic acid concentrations can aid in enhancing endurance performance.
3. Movement economy: The movements that are made should be limited if the endurance performance is to be notable. Running at a set speed for a longer period of time requires less energy. An effective strategy can help save energy in endurance sports. For instance, swimming can save 20–30% of energy if the actions are done correctly. Good runners lower their centre of gravity for efficient mobility, which reduces their superfluous movements.
4. Muscle composition: The slow response fibres are best used for aerobic or endurance exercises. They produce little force over long periods of time, making them ideal for endurance activities.