CSSD Practice Exam 2026 – Complete Study Resource

The typical percentage of energy output attributed to physical activity generally falls within the range of 20-53%. This includes all forms of physical movement, encompassing both structured exercise and unstructured activities such as walking, gardening, or even household chores. The energy expenditure from physical activity can vary significantly among individuals based on factors such as body composition, metabolism, the type and intensity of activities performed, and daily lifestyle choices.

In contrast to this range, lower percentages would not adequately reflect the contribution of physical activity in a person's overall energy expenditure, given that a significant portion of energy is indeed used during various activities throughout the day. The upper extreme is also unlikely because it would suggest that physical activity accounts for a disproportionate amount of energy expenditure compared to other factors such as basal metabolic rate and thermogenesis, which also play crucial roles in total energy balance. Thus, focusing on a more accurate range of 20-53% highlights the significant role that physical activity plays in overall energy expenditure.