Does sitting at a desk all day considered physical labor?

So my husband works 2 jobs because were struggling in this economy. His daytime job is sitting and using his mind. His second job is delivering groceries and packages. But he complains about how he works and has to work again but he isn't doing anything physical during the day. So to me its really a cushy job where he uses his mind and deals with stupid people.
Does sitting at a desk all day considered physical labor?
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