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The top of my left shoulder pinches and cramps (very painfully) when I'm struggling on the last few reps of the barbell curl, why is that?
The top of my left shoulder pinches and cramps (very painfully) when I'm struggling on the last few reps of the barbell curl, why is that?
It sounds like you may be experiencing some muscle fatigue or strain in your shoulder during the exercise. Have you tried adjusting your form or reducing the weight you're using?