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Why do you feel hot after lifting weights?

  1. Mar 17, 2005 #1
    Can someone help me. The questions are in bold and my anwsers are not. Can someone explain it to me.

    1. Why do you feel hot after lifting weight?
    Does it have something to do with cellular respiration..
    2. Can you tell when your muscles went into anaerobic respiration? What evidence was there?
    3. How many more times powerful were you during aerobic exercise than during anaerobic exercise?
  2. jcsd
  3. Mar 17, 2005 #2


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    Excercising, or in general, using muscles requires chemical energy, which produces heat.

    Buildup of lactic acid which causes pain -

    from Lactic acid

    Not sure about what is being asked.

    Anaerobic metabolism/respiration kicks in when the body performs an activity during which the circulatory system (including cardio-pulmonary system) cannot delivery oxygen to the muscles fast enough. The oxygen deficiency then causes anaerobic respiration.

    One can for instance lift heavy weight slowly, or a lighter weight with rapid repetitions. In the latter, one is likely to initiate anaerobic respiration.

    Interesting discussion on muscle development - http://home.hia.no/~stephens/hypplas.htm [Broken] Has the debate been settled?
    Last edited by a moderator: May 1, 2017
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