According to new research, using a tablet can lead to a condition called “tablet neck,” marked by soreness, stiffness, or aching pain in the neck and upper back, arms and hands, or head. Women and young adults are especially prone to the condition, and certain postures increase your risk: sitting without back support, having the device in your lap, and sitting in a chair with the device on a flat surface. When your neck is flexed forward, it can put pressure on your spine, which eventually leads to pain. You can prevent tablet neck by limiting the time you spend hunched over your device. To that end, ensure that you have back support and place the tablet on a stand so that you’re looking straight ahead, not down, whenever possible. Strengthening your neck and shoulder muscles is also important, especially for women. Be mindful of your posture when you’re using other devices, too — “tablet neck” can occur with smartphone use, too.
Source: Gender and posture are significant risk factors to musculoskeletal symptoms during touchscreen tablet computer use.
“Holding a tablet with or without a case on your lap can cause strain on a variety of your muscle groups and can cause eye strain.” Marti Trewe