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Forum ยป Why is it easier to do single arm isolations vs. both arms?
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Thread: Why is it easier to do single arm isolations vs. both arms?

post 1637131893 04-26-2021, 11:36 AM
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  1. CTTK
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Why is it easier to do single arm isolations vs. both arms?

Usually when I'm doing something like DB side lat raises, I'll start with both arms until failure and then can still do more with each arm separately.

What is going on here? I have a couple suspicions, but want to hear what you guys have to say.
post 1637132073 04-26-2021, 11:38 AM
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  1. GNSweetPrince
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Your body can only supply so much oxygen. Using 2 arms takes 2x as much oxygen.

Similar to how a car with a giant engine will still be slow if you choke off the fuel supply.
post 1637132993 04-26-2021, 11:51 AM
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Originally Posted By GNSweetPrince⏩
Your body can only supply so much oxygen. Using 2 arms takes 2x as much oxygen.

Similar to how a car with a giant engine will still be slow if you choke off the fuel supply.
That's one of the things I was wondering about, but is oxygen really going to be limited doing such small isolations? I'm never even close to out of breath for DB raises. Makes sense for squatting or something, but I'm not convinced in this case.
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