IMG_NEW_0046 - transient period of relatively long bone...

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transient period of relatively long bone weakening during the adolescent growth spurt, resulting in an increased fracture risk following peak height velocity. The need for calcium during peak linear growth is substantial. An adequate level of vitamin D in the body is also important - effects of sunshine and diet. Vitamin D deficiency is not uncommon among children and adolescents, particularly during the dark seasons ofthe year. As much bone mineral will be laid down during the four adolescent years sulrounding peak height velocity as most people lose during all of adult life. Peak bone mineral density of the lumbar spine and hip is achieved around the age of 20 years. Adolescence is a critical time for bone mineral accumulation. More than 90 % of adult bone mineral is present by the end of skeletal maturation and any gains in bone mass after growth has ceased are minimal. Fifty percent of the variability in bone mass in the elderly can be accounted for by peak skeletal mass bttained during the
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