The beginning of a new school year brings major changes to a child’s daily routine. Students go from moving freely during summer to spending hours seated in classrooms, carrying school supplies, completing homework, and using computers, tablets, and phones.
These habits do not necessarily cause permanent spinal problems, but a poorly fitted backpack and prolonged screen use can contribute to muscle fatigue, poor posture, and pain in the neck, shoulders, or back. Helping your child develop healthier habits now can make the school year more comfortable.
Can a Heavy Backpack Hurt Your Child’s Back?
A backpack that is too heavy or worn incorrectly can strain the muscles of the back, neck, and shoulders. A child may lean forward to compensate for the weight or raise one shoulder if the bag is carried using only one strap.
Watch your child as they put on and remove their backpack. Signs that it may be too heavy include:
- Leaning forward while walking
- Struggling to put the backpack on
- Red marks on the shoulders
- Complaints of neck, shoulder, or back pain
- Numbness or tingling in the arms or hands
- Changes in posture while carrying the bag
The American Academy of Pediatrics recommends that a child’s backpack weigh no more than 15% of their body weight. A child who weighs 80 pounds, for example, should carry no more than approximately 12 pounds.
How Should a School Backpack Fit?
Choose a backpack that is proportional to your child’s body rather than buying an oversized bag that can be filled with unnecessary items. It should have two broad, adjustable shoulder straps and rest close to the body.
The top should sit approximately one or two inches below the shoulders, and the bottom should rest near the curve of the lower back rather than hanging far below the waist. A chest strap or waist belt can help keep the backpack stable and distribute its weight more evenly.
Encourage your child to use both shoulder straps. Carrying a backpack over one shoulder may feel convenient, but it creates an uneven load and can increase muscle strain.
When packing the bag, place the heaviest items closest to the child’s back. Use separate compartments to distribute the remaining contents evenly. Cleaning out old papers, unnecessary books, and forgotten supplies each week can also keep the weight under control.
How Does Screen Time Affect Posture?
Children frequently look down when using phones, tablets, or laptops. This position moves the head forward and makes the muscles of the neck and upper back work harder to support it.
Remaining in that position for long periods may contribute to:
- Neck and upper-back discomfort
- Tight shoulders
- Headaches
- Muscle fatigue
- Rounded shoulders
- Temporary stiffness or limited movement
The problem is not simply the device itself. It is how long the child remains in one position and how the device is positioned.
Create a More Posture-Friendly Study Area
Whenever possible, homework should be completed at a desk or table instead of on a bed, couch, or floor. Adjust the chair so your child’s feet rest flat on the floor or on a footrest. The back should be supported, and the shoulders should remain relaxed.
Place the screen near eye level so your child does not have to continually bend the head downward. An external keyboard may be helpful when raising a laptop or tablet.
No posture remains ideal when it is held for too long. Encourage your child to stand, stretch, walk around, or change positions regularly. Short movement breaks can reduce muscle fatigue and give the eyes a break from close-up work.
Encourage Movement Outside of School
Regular physical activity helps children develop the strength, balance, coordination, and flexibility needed to support healthy movement. Walking, riding a bike, playing outside, participating in sports, and age-appropriate strengthening activities can all help offset a school day filled with sitting.
Parents can also model healthy habits by putting devices down, taking movement breaks, and maintaining good posture at their own workstations.
When Should Your Child Be Evaluated?
Occasional muscle fatigue may improve after resting or changing the activity. However, ongoing pain should not be dismissed as normal growing pains.
Schedule an evaluation if your child regularly complains of back, neck, or shoulder pain; avoids activities because of discomfort; experiences numbness or tingling; or shows a noticeable change in posture. Pain that occurs even when the backpack is not being worn also deserves attention from a qualified healthcare professional.
Chiropractic Care for Kids in Nashua, NH
At Main Street Wellness, we offer chiropractic care for children and personalized treatment plans designed around each patient’s needs. An evaluation can help identify movement, posture, or musculoskeletal concerns that may be contributing to your child’s discomfort.
Help your child begin the school year with healthier backpack and screen habits. If your child is experiencing recurring neck, shoulder, or back pain, call Main Street Wellness in Nashua, NH, at 603-882-5742 to schedule an appointment.

