[Health] select the hardness of the bed trick

Important when choosing a bed is firmness.
A place to spend one day 1/3 beds Choose the hardness of the mattress of the bed trick introduces even for health.

Weight is estimated

Weight [estimate]
    Weight is
    Less than 45 kg is a soft mattress

40 To 75 kg about who is regular if somewhat stiffer More than 75 kg, and choosing a mattress for stiffer is nice.


Weight at take place when people are sleeping

It is a “waist”.
When choosing a mattress, heavy weight who try to pick hard things possible.
Wrong selection of mattresses, will cause the back.

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