Final answer:
Exercise aimed at reducing stress should be enjoyable and aerobic, allowing for a sustained activity that uses oxygen efficiently without competitive pressure.
Step-by-step explanation:
To reduce stress, exercise should be enjoyable, aerobic, and devoid of competition, predictable, and have repetitive cadence. Aerobic exercise requires plenty of oxygen. It is physical exercise of low to high intensity that relies primarily on the aerobic energy-generating process, meaning it uses oxygen to meet energy demands during exercise.
When aerobic exercise is performed at a light-to-moderate intensity, it can be sustained for extended periods. Popular forms of such exercise include running, jogging, swimming, cycling, and walking. The goal is for all carbohydrate to be aerobically turned into energy without generating lactate, also known as lactic acid.