Hello everyone,

My problem is with my arms, but I think the source is somewhere higher up. Basically, at different times throughout the day, the blood flow to my arms would just decrease, leaving me with fatigued arms even though im just sitting down. Im 18, played soccer and have been lifting for a couple years now, lean and a good amount of muscle on me if that matters. Ive been having this problem probably for a couple months, but I finally decided to stop ignoring it because (as crazy as I might sound), i think its hindering my biceps growth. These past several months I have gained muscle like usual, except my arms are not getting bigger, in fact they seem to be shrinking! I searched some stuff up and thought it could be a tight pec minor because i do feel tightness there, but i also feel something in my armpit area too. This has been extremely frustrating, sitting at my desk while i study and reaching muscle failure as if im lifting, any help is greatly appreciated.

EDIT: reading this over i realized its not very detailed. Let me add a couple of things. Im in uni right now, but in highschool I had cringe worthy posture while sitting throughout the day, absolutely horrid, and that might have affected things, because the blood flow decreases mostly when im sitting for long. Also biomechanically, if you were to ask my opinion about my body's dysfunctions I would say the following (none of which has been evaluated by a pro, just self-diagnosis):
- Slight forward head posture
- tight hip flexors, inhibited glutes, and anterior pelvic tilt
- underdeveloped vastus medialis
- inflexible in general, and not too good shoulder mobility when i reach overhead

Hope thats better, tell me if you need any details, thanks.

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