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The proximal cause is a nerve getting pinched or a lack of blood flow making nerves anoxic. So either your circulation is getting easier to cut off or your nerves are getting pinched more easily.
It's probably circulation and it's impacted by a lot of things. Getting good exercise tends to help, lol. Also being hydrated. You also might just need to change your sleeping posture or get a different pillow to avoid squishing just the right part of your arm.
Dude I don't know, but the bigger my lats and biceps get, the harder it is to hold a phone to my ear, and I'm whining like a baby that my arm is sore.
Had this exact problem when I first got swole and asked my personal-trainer friend about it. Solution is frequent stretching - like a whole lot of it. You have completely reshaped your muscles without stretching out the tendons so it's causing problems. If you stretched half as hard as you lifted you'd be in great shape
Try some yoga. Limbs falling asleep is a circulation thing. Part of the problem there is the inflammation of the muscle, so you sort of have to strengthen the cardio system so it can deal with the constrained space. Bearing in mind, my understanding of yoga is just “breathe into the stretch”
What others have said, and also don't ignore the cardio, no skipping heart day.
in addition to the other good advice: try high absorption magnesium supplement to take before bed. magnesium citrate or lysinate or "chelated" magnesium.
I had a similar thing I think when I landscaped.
Instead of mulch, some days it was gravel so you had to grip that fucking shovel like your life depended on it.
I think a couple days of that did something similar, cause my left hand would go lightly numb for weeks at a time. I think I probably had one particular “preexisting condition” of a broken bone on that side, that never really healed correctly affecting my posture
I never figured it out for sure, I just quit that fucking job when i could
depending on the duration of time you have been working out I would guess it is something like tennis elbow. Especially if you are getting into working out after a long period of time your tendons and joints take a while to get used to all the commotion. Try an ace wrap and see if it doesn't get better. if it gets worse consider some nsaids and seeing what you are doing to irritate your joints and find lower impact movements to try.
As others have said stretching is one possible issue and the tendons and joints not catching up could be another. I notice this happened to me a lot too. For me it wasn't the blood flow so much as nerve pressure on my spine from laying on my back. I would get it sometimes even if I was laying with my arms down by my side.
Well I solve this before it happens by only eating fresh potatos!
