I can’t think of a worse design than laptops for creating poor posture, aching shoulders, neck and back, sore wrists and fingers, and eye strain, but there are solutions.
Using a laptop for an hour or two each day will likely not create problems. Extended use is another matter. The screen is too low, the keyboard is separated from the user by the touch pad and hand rest, and the keyboard is likely sitting on top of a desk, which is too high for shoulders, forearms, and wrists.
Improving the situation