5 ms·

Just walk around with a 3 pound weight strapped to your arm and tell me how it feels afterwards.

by pineaux 6y ago

neolog 6y ago
That's a bit heavier than a large water bottle. 1 liter water is 1 kg = 2.2 lbs. Definitely wouldn't make me sweat.
- cosmodisk 6y ago
  1 liter of water can be very, very heavy for your arm. Here's an experiment for you: take a bottle of water, lift it up so your arm would make 90° angle and hold it for 3 minutes without lowering your arm. When you carry a bottle, you keep passing it from one hand to another: inability to do so will make it very challenging in probably less than 20min.
  - neolog 6y ago
    That assumes all the weight is at the end of the arm, which it isn't in this case. I do have a weight on my shoulder: my arm. Holding your arm up for a long time is hard anyway. A human arm weights 8 pounds. > When you carry a bottle, you keep passing it from one hand to another That's a good point. > inability to do so will make it very challenging in probably less than 20min That seems a bit extreme. Anyway grip is the part that fails, not the shoulder strength.
    - pineaux 6y ago
      Put your money where your mouth is. Get a 3 pound weight, strap it to your arm. See how comfy you are with it. Or don't, but don't assume you know better without an experiment.
      - deleted 6y ago
        [deleted]
      - neolog 6y ago
        "don't assume you know better" than what? Why is it assumed that I'm wrong by default? Anybody who has an opinion about this can test it themselves.
        pineaux 6y ago
        Because you make a claim that is based on nothing against a claim based on evidence.
        neolog 6y ago
        I didn't see evidence in either direction. Maybe I missed it?
      - deleted 6y ago
        [deleted]
    - cosmodisk 6y ago
      >very challenging?? Yes, challenging. It's not the weight of the bottle per se that'd make it difficult but the fact that muscle groups responsible for gripping the bottle can't be relaxed,even for a short period, compared to when changing hands from time to time. I had situations where as simple action as using a screwdriver can make your body sweat like a pig if you overdo it for too long.
      - neolog 6y ago
        > groups responsible for gripping the bottle The prosthetic user isn't required to grip the arm though. It's strapped on.
        cosmodisk 6y ago
        Correct. However, a well functioning shoulder is a pretty complex mechanism. If any part of it is removed,the others struggle or fail altogether. A removal of the entire arm, offloads all the work onto the edge of a shoulder that would normally receive help from the arm and its connected muscles. I did break humerus in my left arm,which resulted in functional degradation of my arm: I can't lift heavier things in a certain way, some movements are restricted, the arm gets stiff if I sleep on it,etc.) All in all it's not too bad but that's the result of some muscle damage,so try to imagine how bad it is when the whole arm is missing.

Just walk around with a 3 pound weight strapped to your arm and tell me how it feels afterwards.

neolog 6y ago

That's a bit heavier than a large water bottle. 1 liter water is 1 kg = 2.2 lbs. Definitely wouldn't make me sweat.

cosmodisk 6y ago
1 liter of water can be very, very heavy for your arm. Here's an experiment for you: take a bottle of water, lift it up so your arm would make 90° angle and hold it for 3 minutes without lowering your arm. When you carry a bottle, you keep passing it from one hand to another: inability to do so will make it very challenging in probably less than 20min.
- neolog 6y ago
  That assumes all the weight is at the end of the arm, which it isn't in this case. I do have a weight on my shoulder: my arm. Holding your arm up for a long time is hard anyway. A human arm weights 8 pounds. > When you carry a bottle, you keep passing it from one hand to another That's a good point. > inability to do so will make it very challenging in probably less than 20min That seems a bit extreme. Anyway grip is the part that fails, not the shoulder strength.
  - pineaux 6y ago
    Put your money where your mouth is. Get a 3 pound weight, strap it to your arm. See how comfy you are with it. Or don't, but don't assume you know better without an experiment.
    - deleted 6y ago
      [deleted]
    - neolog 6y ago
      "don't assume you know better" than what? Why is it assumed that I'm wrong by default? Anybody who has an opinion about this can test it themselves.
      - pineaux 6y ago
        Because you make a claim that is based on nothing against a claim based on evidence.
        neolog 6y ago
        I didn't see evidence in either direction. Maybe I missed it?
    - deleted 6y ago
      [deleted]
  - cosmodisk 6y ago
    >very challenging?? Yes, challenging. It's not the weight of the bottle per se that'd make it difficult but the fact that muscle groups responsible for gripping the bottle can't be relaxed,even for a short period, compared to when changing hands from time to time. I had situations where as simple action as using a screwdriver can make your body sweat like a pig if you overdo it for too long.
    - neolog 6y ago
      > groups responsible for gripping the bottle The prosthetic user isn't required to grip the arm though. It's strapped on.
      - cosmodisk 6y ago
        Correct. However, a well functioning shoulder is a pretty complex mechanism. If any part of it is removed,the others struggle or fail altogether. A removal of the entire arm, offloads all the work onto the edge of a shoulder that would normally receive help from the arm and its connected muscles. I did break humerus in my left arm,which resulted in functional degradation of my arm: I can't lift heavier things in a certain way, some movements are restricted, the arm gets stiff if I sleep on it,etc.) All in all it's not too bad but that's the result of some muscle damage,so try to imagine how bad it is when the whole arm is missing.