Energy needs

  • Created by: ZR1
  • Created on: 14-06-17 15:58

Functions of Energy

  • Growth
  • Movement
  • Body warmth
  • Production of sound
  • Brain function
  • Chemical reactions
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Main sources of Energy

  • Carbohydrate:50%
  • Fat:35% or less
  • Protein:15%
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Deficiency of Energy

  • Body loses weight as fat stores are used up.
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Excess of Energy

  • Energy stored as fat.
  • Weight of body increases.
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Basal Metabolic Rate

  • Amount of energy needed to keep us alive and working.
  • Varies according to age, gender, body size, Physical Activity Level.
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Energy Balance

  • Amount of energy consumed in food must be used up by BMR and PAL.
  • Too much energy consumed leads to weight gain.
  • Too little energy consumed leads to weight loss.
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Physical Activity Level

  • Physical activity reduces the risk of developing a range of diet-related diseases.
  • Improves strength of skeleton and muscles.
  • Keeps brain alert.
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