The structured movement process that individuals consciously and voluntarily engage in for the purpose of improving or maintaining fitness and health is called:

Exercise

Explanation:

Exercise -

It is the type of physical activity , which is done , in order to maintain the physical fitness and health of an organism , is referred to as exercise .

This physical activity is done to have many health benefits like , improving cardiovascular system , maintaining posture , weight loss , developing muscles , prevent the process of aging .

The exercise can be done indoor as we as outdoor in the fresh airs to have better effect on the body.

Hence , from the given statement of the question, the correct term is exercise.

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hope this .