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Aside from known injuries to your lower back, you often stand for long periods in incorrect footwear. You may also be sitting in small chairs or going from sitting on the floor to standing frequently.
You may be clenching your teeth or sitting for long periods with poor posture when marking papers, using computers or doing lesson planning.
You stand or sit for long periods of time and are likely not to notice your posture. Your hectic schedule combined with poor posture results in extreme forces through your neck and upper back.
You perform repetitive motions all day, as well as lifting and carrying. These activities cause stress on your shoulders and elbows and wrists.