2026 ex phys human energy expenditure at rest and physical activity

what is oxygen consumption?

defined as the uptake and utilization of oxygen by the cells

what is a MET?

the energy expended at quiet rest in supine after a period of fasting and not exercising

1 MET= ?

3.5mL*kg ^-1 min

what is the MET goal for health

7.5-15 MET -hrs/week

what is exercise intensity?

curvilinear relationship btwn work rate and energy expenditure

which mm fiber type are more efficient in using atp? type 1 or type 2

slow type 1

how much amount of heat (atwater) is produced for every gram of lipids metabolized?

9 kcal/g

how much amount of heat (atwater) is produced for every gram of CHOS metabolized?

4 kcal/g

how much amount of heat (atwater) is produced for every gram of protein metabolized?

4 kcal/g

what are the 3 components of our total daily energy expenditure? TDEE

thermic effect of feeding, thermic effect of physical activity, and resting metabolic rate (basal metabolism)

the metabolic rate is affected by what things?

body size!!

physical activity

dietary induced thermogenesis

climate

pregnancy

**how many mets is low physical activity?

1.1-2.9mets

**how many mets is moderate physical activity?

3-5.9 mets

**how many mets is vigorous physical activity?

greater than or equal to 6 mets

**low intensity = how much of max hr?

< 50% of max hr

**moderate intensity = how much of max hr?

50-75% of max hr

**heavy intensity = how much of max hr?

76-85% of max hr

**very heavy intensity = how much of max hr?

86-100% of max hr

**severe intensity = how much of max hr?

> 100% of max hr

**what is the number one thing that influences testing?

body composition + amount of hemoglobin (men have 10-14% more than women)

**womens vo2max is __%-__% below the scores of men

15-30% below

**how much is the decline of vo2max after the age of 25?

1% per year or 10% per decade

true or false? trained individuals have a higher mm and blood lactic acid level as well as greater depletion of mm glycogen?

true

what is vo2max?

the maximum amount of oxygen your body can use during intense exercise.

what would be the best testing mode for an athlete?

whatever activity theyre trained in

why can one use HR in the clinic as an estimate of vo2max?

bc hr has a predictable relationship with oxygen consumption

what is the most important factor that influences vo2max?

body composition and amount of hemoglobin

If Mr. G (age 38) and Mrs. J (age 48)  are both sedentary. In general, who do you expect to have a higher VO_{2 max}  and why?

mr. g bc men have higher vo2max due to less body fat than women and greater oxygen carrying capacity due to higher amount of hemoglobin

What are the Atwater factors for fat, CHO and protein?

fat 9 kcal/g

chos 4 kcal/g

protein 4 kcal/g

What are the 4 domains of Exercise Intensity?

moderate, heavy, very heavy, and severe