[Effects of different exercises on the bone metabolism level of middle-aged and old women].
We have investigated the effects of different exercises on middle-aged and old women's bone mineral density (BMD), on the metabolic indexes of bone, on the levels of serum elements, and on the correlation between body components and the indexes. On the basis of informed consent, 90 cantonal women pursued three types of exercises (Taijiquan, Swimming and brisk walking) in Chengdu City. BMD indexes of calcaneus were tested by Osteospace quantitative ultrasound instruments; The serum levels of Mg, Ca, P elements and alkaline phosphatase (ALP) were determined by full-automatic biochemical analysis instrument; The serum level of osteocalcin (BGP) was determined by radioimmunoassay. There were no obvious differences of anthropometric indexes between Taijiquan, Swimming, Brisk walking and Control groups. In comparison with control, the serum levels of Mg element increased significantly in the three exercise groups, and the serum levels of Ca and P element increased significantly in Swimming group and Brisk walking group. The serum levels of BGP and ALP were lower than those of control group, but no statistically significant differences were observed. Speed of sound (SOS) and stiffness index (STI) of BMD indexes in Brisk walking group were significantly higher than in Taijiquan group, Swimming group and Control group, and the prevalences of osteopenia and osteoporosis were the lowest in the Brisk walking group, but no obvious decreases of osteopenia and osteoporosis were observed in Taijiquan group and Swimming group. Broadband ultrasound attenuation (BLIA), SOS, STI of BMD indexes were positively correlated to serum levels of Mg, Ca, P, and were negatively correlated to the serum levels of BGP and ALP, and were positively correlated to body weight, BMI, lean body mass and body fat percentage. In conclusion, brisk walking is a fitting type of exercise for middle-aged and old cantonal women; it maintaines normal levels of bone metabolism.
Wang
Chun
C
Faculty of Sport Medicine, Chengdu Sport University, Chengdu 610041, China.
Yang
Zehong
Z
Chen
Yan
Y
D000368:Aged; D000469:Alkaline Phosphatase / Q000097:blood; D015519:Bone Density; D015444:Exercise / Q000502:physiology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D015663:Osteoporosis, Postmenopausal / Q000378:metabolism / Q000517:prevention & control*; D016138:Walking / Q000502:physiology*
D000469:Alkaline Phosphatase