So what's the best way to hold your mobile device? Do your hands get tired or your neck and shoulders feel the strain of your head always looking down? Think of the effort your body exerts holding up that head bent forward looking down while your hands and arms are holding that mobile device.
Surely ergonomics and poor posture for hours at a time daily are revealing weakness and taking a toll. It doesn't do your body good.
What are you doing different to balance your head, neck, hands and arms from feeling the strain?