4 ms·
> It was only three pounds or so, but three pounds feels like a ton to a limb that typically carries no weight, and the heft of the prosthetic hand pulled hard
by neolog 6y ago
> It was only three pounds or so, but three pounds feels like a ton to a limb that typically carries no weight, and the heft of the prosthetic hand pulled hard on the socket and made me sweat. In order to open and close, myoelectric hands require that you flex your muscles where sensors inside of the socket can detect your movement.
I wonder how much of the problem is because those muscles are underdeveloped.
- pineaux 6y agoJust walk around with a 3 pound weight strapped to your arm and tell me how it feels afterwards.
- neolog 6y agoThat'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 ago1 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 agoThat 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 agoPut 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.
- 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.