Height measurement A person's height is a parameter of age. It decreases with aging due to thoracic spine kyphosis, compression of the vertebrae, diminished extension of the hips and knees and abdominal muscle mass relaxation in the older population. They lose stature because of vertebral compression, postural slump and loss of muscle to Height measurement in this age group may be a difficult because of the inability or the unwillingness of the elderly to stand straight as a result of vertebral compression, postural slump and muscle tone loss. A stadiometer that is free standing is used to measure standing height in the older population. The sampled person should stand straight with head facing forward and shoulders relaxed, arms hanging loosely at sides with palms facing forwards and feet together and knees straight. The heels, buttocks and shoulder blades should touch the vertical backboard of the free standing stadiometer. Minimal clothing should be worn and shoes and socks must be removed. During measurement, the person should take a deep breath and stand tall. Then, the movable headboard is lowered to touch the crown of the head. Measurement is recorded to the nearest and the time of the day the measurement is also noted since diurnal variations can present. Subsequent measurements should be done at similar times and in the afternoons if possible.