You still need to be careful: 4 years is not that long. Middle Ages people were exposed to very harsh environments and still lived to 30.
I started getting neck pains after 11 years into my programming career. I attribute it mostly to programming on a sofa with a laptop -- in this position you constantly look a bit down (if a laptop is on your lap) and your neck will not like it.
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You still need to be careful: 4 years is not that long. Middle Ages people were exposed to very harsh environments and still lived to 30.
I started getting neck pains after 11 years into my programming career. I attribute it mostly to programming on a sofa with a laptop -- in this position you constantly look a bit down (if a laptop is on your lap) and your neck will not like it.