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RDA per Kg

  • 27-08-2011 9:35am
    #1
    Mr Marri
    Closed Accounts Posts: 266 ✭✭


    Quick question. What weight/lean body mass are the RDA's based on and can I just divide down to get an RDA for my lean body mass.


Comments

  • #2
    EileenG
    Registered Users, Registered Users 2 Posts: 5,775 ✭✭✭EileenG


    Try the Katch McArdle calculator to work out this http://www.cordianet.com/calculator.htm


  • #3
    opinion guy
    Closed Accounts Posts: 11,001 ✭✭✭✭opinion guy


    Mr Marri wrote: »
    Quick question. What weight/lean body mass are the RDA's based on and can I just divide down to get an RDA for my lean body mass.

    Why would you want to do this ?

    RDA's are derived from aggregate data of over a population. As such they are useful for describing and comparing populations only....not individuals.
    Their application to an individual in the manner you suggest is a prime example of the ecological fallacy http://en.wikipedia.org/wiki/Ecological_fallacy.


  • #4
    Mr Marri
    Closed Accounts Posts: 266 ✭✭Mr Marri


    opinion guy wrote: »
    Why would you want to do this ?

    RDA's are derived from aggregate data of over a population. As such they are useful for describing and comparing populations only....not individuals.
    Their application to an individual in the manner you suggest is a prime example of the ecological fallacy http://en.wikipedia.org/wiki/Ecological_fallacy.

    :eek: really, so I should just ignore the RDA values as they can't be applied to individauls.....If this is the case then I'm really confused :confused:


  • #5
    EileenG
    Registered Users, Registered Users 2 Posts: 5,775 ✭✭✭EileenG


    They're a starting point. Probably 70-80% of the population will do perfectly well if they use those calories. Some old or inactive people will need less, some athletes will need more.

    Personally, I'm not happy with the distribution of the protein, fat and carbs in the RDA but that's a different issue from the calorie requirements.


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