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Metabolism - PowerPoint PPT Presentation


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Metabolism. Definitions…. Metabolism – the sum of all the chemical processes whereby _______ is made available and used by the cells of the body Energy – the ability to do work. Catabolic Metabolism. Anabolic Metabolism. Two Types of Metabolism. Energy is used for….

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Presentation Transcript
definitions
Definitions…
  • Metabolism – the sum of all the chemical processes whereby _______ is made available and used by the cells of the body
  • Energy – the ability to do work
energy balance equation
Energy Balance Equation
  • Resting Metabolic Rate (55-75%)

+

  • Thermal Effect of Food (5-15%)

+

  • Physical Activity (10-40%)

=

  • Total Energy Expenditure (100%)
energy cal body weight
Energy (cal.) & Body Weight
  • 1st Law of Thermodynamics
  • Weight gain
  • Weight loss
  • Weight maintenance
resting metabolic rate
Resting Metabolic Rate
  • The number of calories the body burns in a 24-hour period while at rest and fasting.
  • Liver ___% of total calories burned
  • Brain ___%
  • Heart ___%
  • Lungs ___%
  • Kidneys ___%
  • ________ ___%
  • At rest approx. ____% of energy is derived from stored body fat
resting metabolic rate gender
Resting Metabolic Rate & Gender
  • Resting metabolic rate (energy expenditure) is approximately 10% lower in women than men
  • RMR is essentially the same when expressed per unit of “fat-free mass”
  • Therefore, not a true gender difference
effects of strength training on resting metabolic rate
Effects of Strength Training on Resting Metabolic Rate
  • 24 weeks strength training = increase RMR 6% - 9%
  • Each additional pound of muscle tissue = ____ kcal/day increase in metabolism
effects of severe caloric restriction dieting on rmr
Effects of Severe Caloric Restriction (Dieting) on RMR
  • _____% decline in RMR with severe caloric restriction

- Result of:

1. ___________________

2. ___________________

set point theory adaptive thermogenesis
Set Point “Theory” & Adaptive Thermogenesis
  • Hypothalamus establishes a “set point” or body weight that it will work to maintain
  • Adaptive Thermogenesis – the body will speed up or slow down metabolism to maintain the set point
  • If consume fewer calories…
  • If consume more calories…
  • To reset the set point
thermal effect of food
Thermal Effect of Food
  • Calories burned to digest, absorb, and transport the nutrients in food we consumed.
  • Protein: 15-25% (of food calories)
  • Carbohydrate: 8-12%
  • Fat: 5%
physical activity thermal effect
Physical Activity (thermal effect)
  • Calories burned to support physical activity
  • Activities of daily living

- ________ Factor

  • Planned exercise

- Intensity and duration

post exercise thermogenesis
Post Exercise Thermogenesis
  • The increased metabolic rate (calories burned) above resting metabolism (Resting Metabolic Rate) that follows cessation of exercise.
  • approx. 15% of total exercise caloric burn