This video shows some check ups for your left hand for efficient bass playing.
I do not intend to cover this subject completely. I also want to mention that motor learning is an individual trajectory and therefor is different for everyone. I give a general view on this subject: if you notice any pain or discomfort then check if you need to rearrange these tips to make it suitable for your hand.
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![](https://i.ytimg.com/vi/-QcbePovsyM/maxresdefault.jpg)