Height and weight charts

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  • Created by: Kathryn
  • Created on: 13-12-12 22:09

Height and weight charts

  •  Used to show a normal range of weight of people of any particular height
  •   Overweight people for their height are unlikely to be very fit
  • Some people who are  underweight for their height could be fit e.g. marathon runners although people who are very underweight are unlikely to be fit as they have too little muscle tissue
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Strengths of height and weight charts

  •  Based on standardised data  
  • Easy to use
  • Can be done in your own home
  • Can be used to monitor progress over time
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weaknesess of Height and weight charts

  •  Takes no account of body build  
  • Takes no account of the proportion of fat in a person’s body compared with muscle
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Body mass index (BMI)

  •  Indicates a person’s body weight in relation to height
  • Calculated by finding the person’s weight in kilograms and dividing it by the square of his/her height in metres  
  • BMI= weight (kg)/height (m)2
  •  Range between 18.5 and 24.9kg/m2 is normal
  • Less than 18.5 kg/m2 is underweight Range between 25 and 29.9kg/m2 is overweight
  • More than 30kg/m2 is obese
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Strengths of BMI

  •  Standardised measure so an individual’s score can be compared with population norms  
  • Shows progress as a result of an exercise programme for example
  • Quick and easy
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Weaknesses of BMI

  • Takes no account of body build  
  • Takes no account of the proportion of fat in a person’s body compared with muscle
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Exercise Pulse Rates

  •  Pulse rate is a measure of how fast the heart is beating  
  • Gives an indication of aerobic fitness  
  • Pulse rate must be measured at rest to establish a base line measure
  • People who have a lower resting pulse rate are generally fitter aerobically
  • This is because in a fit person, the heart’s stroke volume is likely to be higher, so the heart can deliver enough oxygen to tissues without having to beat as frequently as that of an unfit person 
  • Average resting pulse rate for an adult ranges from 60bpm to 80bpm
  • A fit person is likely to range from 40bpm to 60bpm
  • Children and elderly people have higher resting pulse rates
  •  Pulse rate can be an indication of fitness during exercise  
  • If 2 people are doing the same amount of exercise and one person’s pulse rate is lower than the other then this person is likely to be aerobically fitter. This is partly due to a greater stroke volume
  •   Recovery rate is also a good indicator of someone's fitness
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Strengths of exercise pulse rate

  •  Standardised data on average resting and exercise pulse rates are available for different age groups and sexes, so comparisons can be made  
  • The pattern of pulse rate before, during and after exercise is one of the best indicators of aerobic fitness
  • Pulse rate usually taken at radial or carotid pressure points
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Weaknesses of Exercise pulse rate

  •  Difficult to measure during exercise so can use pressure sensors on the wrist  
  • Electrocardiography- electrical sensors attached to skin on chest. These give more detail about what is happening in different parts of the heart and circulatory system. This is specialised equipment and not widely available
  • Can be affected by other factors such as anxiety
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