Peak Bone Mineral Accrual Effected by Diet, Physical Activity and Other Lifestyle Factors in Adolescent Girls and Boys : A 5-year Longitudinal Study
【Supercategory：7. DESCENTE SPORTS SCIENCE Subcategory：7.22 Vol.22】
The purpose of this study was to investigate the age of reaching peak bone mass and the factors associated with bone mineral acquisition in pubertal girls and boys.
Two hundreds and sixty two girls and 282 boys aged 10-15 were recruited from 1995 to 1999. Bone measurements were made at one year intervals over 5 years by ultrasound densitometer (Achilles A1000) at the calcaneus together with questionnaires about menstrual status, physical activity, diet and other lifestyle factors from childhood to the present.
Each bone data compared with the mean value of the same age was returned to the students in their class of health education. The students also had learned about what osteoporosis was including the risk factors and the importance of the prevention from very young.
Peak bone mass should be accumulated by the age of 15 years old in girls and older in boys by longitudinal observation, which was one to two years later than height spurt. Their bone minerals were associated with body weight, height, body mass index (kg/m²), intake of dairy products in girls and boys, age at menarche and Japanese life-style living on Tatami mat in girls. Yearly increase in bone mass was associated with their increase in vegetable and fish in both girls and boys and with Japanese life-style and increase in physical activity in girls. The fracture rates of girls in Japanese life-style was significantly lower than girls in westernized life-style on sofa and chair. The yearly increase in boys was associated with their consciousness of previous levels of bone mass measurement.
These date suggested that the age 10 to 15 years be critical age especially in girls to accumulate the higher peak bone mass which enable to prevent osteoporosis in the later of their lives. Thus bone measurement and the education of bone health in pubertal age could help to improve their diet and physical activity and to induce their level of peak bone mass fully elevated.
DESCENTE SPORTS SCIENCE Vol.22/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
Two hundreds and sixty two girls and 282 boys aged 10-15 were recruited from 1995 to 1999. Bone measurements were made at one year intervals over 5 years by ultrasound densitometer (Achilles A1000) at the calcaneus together with questionnaires about menstrual status, physical activity, diet and other lifestyle factors from childhood to the present.
Each bone data compared with the mean value of the same age was returned to the students in their class of health education. The students also had learned about what osteoporosis was including the risk factors and the importance of the prevention from very young.
Peak bone mass should be accumulated by the age of 15 years old in girls and older in boys by longitudinal observation, which was one to two years later than height spurt. Their bone minerals were associated with body weight, height, body mass index (kg/m²), intake of dairy products in girls and boys, age at menarche and Japanese life-style living on Tatami mat in girls. Yearly increase in bone mass was associated with their increase in vegetable and fish in both girls and boys and with Japanese life-style and increase in physical activity in girls. The fracture rates of girls in Japanese life-style was significantly lower than girls in westernized life-style on sofa and chair. The yearly increase in boys was associated with their consciousness of previous levels of bone mass measurement.
These date suggested that the age 10 to 15 years be critical age especially in girls to accumulate the higher peak bone mass which enable to prevent osteoporosis in the later of their lives. Thus bone measurement and the education of bone health in pubertal age could help to improve their diet and physical activity and to induce their level of peak bone mass fully elevated.
DESCENTE SPORTS SCIENCE Vol.22/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
| Researcher | Tomoko Kusu*1, Takako Hirota*1, Kaori Ishimaru*1, Chinami Takeda*2, Kenji Hirota*3 |
|---|---|
| University or institution | *1 Research Laboratory, Tsuji Academy of Nutrition, *2 Department of Environment Health in Susami, *3 Obstetric and Gynecology in Nissei Hospital |
Keywords
peak bone mass, bone mineral acquisition, pubertal girls and boys, physical activity, diet