With my non-dominant arm, I can do only 60-70% reps of what the other can. Is that normal?
I am quite new to weightlifting and not really a type to ever be ripped (skinny, 16,6 cm wrists. Anyway, I am concerned whether this is normal:
I do bicep curls with two 18 pound dumbbells. In the first set, I can do 10 with both of my arms. In the second set, I can do 10 with my right, but only 8 with my left. In the third set (even when I rest for several minutes), my right feels quite good and I can do 9-10, while my left can do only 5-6.
Could this be normal? I am a bit scared if that cannot be some neurological problem.
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If you are new to weightlifting, and for example use your dominant arm a lot in your daily life but not your non-dominant, that actually could be a normal thing. However, we can't tell if it is just an muscular imbalance or something caused by some sort of disease via the internet and without you seeing a doctor.
If it is just an imbalance you can easily balance that out over time with e.g. training these muscles unilaterally, where the non-dominant side goes first and the dominant side only performs as much reps as the non-dominant side did before. In severe cases of muscle imbalance you also could do more sets on the weaker side.
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