The combination of frequency, duration, and intensity is often referred to as the dose or volume of physical activity and reflects the total amount of movement performed within a specific time period. Activities are also operationally characterized according to their frequency (i.e., number of movements per day), duration (i.e., recorded minutes of actual movement), intensity (i.e., associated effort to perform the movement), and type (i.e., nature of movement as being, for example, aerobic or bone-strengthening related activities). For youth, the movement captured in this behavioral definition can be categorized as either structured (i.e., repetitive, organized activity, often led by an adult and performed in physical education class) or unstructured (i.e., play, unsupervised, activity performed during recess or school breaks). This captures the volitional nature of physical activity and the various physiologic, psychosocial, and environmental factors that influence it. previously described physical activity as “Any bodily movement produced by skeletal muscles that result in caloric expenditure.” 15 This definition has been widely accepted but a more recent conception, developed through a consensus conference on physical activity research, 6,9 provides an operational definition to avoid subjectivity and facilitate assessment: "behavior that involves human movement, resulting in physiological attributes including increased energy expenditure and improved physical fitness."Ī critical element in the new definition is the labeling of physical activity as a behavior. Physical activity can be quantified and interpreted in a variety of ways.
Energy cost of physical activity definition how to#
These sections provide the foundation for understanding how to assess behavior and movement and estimate energy expenditure in youth. Emphasis is then placed on the unique challenges of assessing physical activity and sedentary behavior in youth, as that population is NCCOR’s focus. The fundamental definitions and distinctions related to both physical activity and sedentary behavior are described first, followed by summaries of physical activity and sedentary behavior recommendations. This section describes concepts that are important for understanding the remaining sections of the Guide.
There are obvious limitations with using MET’s, and hence why it shouldn’t be used exclusively to determine energy expenditure, but it does give you a good idea on how activities compare.Key Concepts for Understanding Individual Physical Activity
Have a look at just a few physical activities and compare the estimate energy expenditures. Please bare in mind that this is only a guide and is unable to take in to account: gender, age, stature, movement efficiency, fitness levels, geography or environmental conditions, but MET’s do give you a pretty good idea that you can quickly estimate energy expenditures for a given activity.
0 kommentar(er)
