7) Energy Expenditure

Question 1

At what age does running economy improve?

Answer 1

10-18y/o

Question 2

At what exercise level will those w/greater running economy consume less energy?

Answer 2

Sub-max

Question 3

Kids require what percent more O2/body mass unit than adults to run at a given speed and why?

Answer 3

20-30% → Kids are growing and producing more hormones

Question 4

MET

Answer 4

Measure of activity intensity; Represents an avg person’s resting metabolism or VO2

Question 5

How do you calculate a MET?

Answer 5

X x resting or 10.5ml/kg/min

Question 6

How many METs do ADL’s require?

Answer 6

3-5

Question 7

Are METs used for kids?

Answer 7

No

Question 8

What three things influence TEE?

Answer 8

• RMR (60-75%) → Change by incr muscle mass
  
  • Fat-Free Body Mass
  • Gender
  • Thyroid
  • Hormones
  • Protein Turnover
• Thermal Effect of Feeding (10%)→ Changes based on foods you eat
  
  • Food Intake
  • Cold
  • Stress
  • Thermogenic rugs
• Thermic Effect of PA (15-30%) → Changes w/exertion
  
  • Duration & Intensity
  • Work
  • Home
  • Recreation/Sport

Question 9

Non-Exercise Activity Thermogenesis (NEAT)

Answer 9

ADL’s, Fidgeting, Maintaining Posture

Question 10

What is the avg daily TEE for males and females?

Answer 10

• Males = 2,900 - 3,000kcal
• Females = 2,200kcal

Question 11

Direct Calorimetry

Answer 11

Measures heat production

• How cals are determined by setting food on fire in an airtight, thermally-insulated chamber
  
  • Each incr in water temp of 1°C/kg/H20 = 1kcal of energy

Question 12

Can you use direct calorimetry for moving activities?

Answer 12

No

Question 13

Indirect Calorimetry

Answer 13

Measures O2 consumption; Quantitative measurement of max capacity for aerobic ATP resynthesis

• Much simpler and cheaper than a metabolic cart
• Results are comparable to direct calorimetry