Physical Activity Flashcards
Physical activity:
bodily movement generated by skeletal muscles resulting in energy expenditure (heat production)
EE divisions:
- non-exercise activity thermogenesis (NEAT)
- voluntary PA
Metabolic energy (heat) =
kcal = energy required to heat 1 kg of water 1 degree C
1 kcal =
200-250 mL O2
Metabolic cart measures…
oxygen uptake (use) and carbon dioxide production
What type of calorimetry is metabolic cart?
indirect
Metabolic chamber measures…
- oxygen uptake (use) and carbon dioxide production
OR - heat production
What type of calorimetry is metabolic chamber?
- can be direct
- If they measure heat production, it is direct
- If they measure how much oxygen is used overtime, it is indirect
Doubly labelled water technique measures…
Accurately measures oxygen uptake (use) and carbon dioxide production
What type of calorimetry is doubly labelled water technique?
- indirect
- Long term measure estimate of O2 and CO2
2 ways to classify EE:
- METs
- FIT
MET:
- metabolic equivalent of task
- amount of oxygen consumed at rest
METs normalizes…
the metabolic demand of a given activity/across activities
1 MET =
~ 3.5 mL O2/kg/min
FIT stands for:
- frequency
- intensity
- time
FIT is used to calculate/tally….
TEE over time
PA is a complex construct, with ____ hours and many different ____ ____.
- 24 hours
- movement behaviours
Sitting:
a position in which one’s weight is supported by one’s buttocks rather than one’s feet, and in which one’s back is upright
Passive sitting:
< or equal to 1.5 METs
Active sitting:
> 1.5 METs
Lying:
being in a horizontal position on a supporting surface
Passive lying:
< or equal to 1.5 METs
Active lying:
> 1.5 METs
Standing:
a position in which one has or is maintaining an upright position while supported by one’s feet