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Is Walking Exercise a Protective Factor for Osteoporosis in Young Obese Women?

100%
Habibzadeh N., Rahmani-Nia F., Daneshmandi H.
Journal of Human Kinetics
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2010
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vol. 25
41-47
EN
Twenty obese (BMI>30) women with an average age of 22.00 ± 1.50 years volunteered to participate in this study. They were randomly assigned to exercise (n=10) and control (n=10) groups. Before and after the training program, both groups were evaluated for anthropometric measurements and blood analysis. Bone mass density (BMD) was evaluated by using dual-energy X-ray absorptiometry (DXA) at the hip and spine (L2- L4). Each walking session was 30 min walking at 50-75% of maximal heart rate, 3 days per week, for 2 months. After 2 months, the exercise group showed no significant effect on BMD at the spine (L2- L4) and hip (p>0.05). However, there was a slightly increase in BMD at both regions, while the control group did not. Also, no change was observed in bloods factors. Percent body fat, fat mass and lean mass changes in response to training were significant in the exercise group (all p=0.000). As a result, it may be suggested that walking programs of longer duration and higher intensity can influence BMD and related factors in obese girls, however to achieve this result, more studies are needed.
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Preventing Osteoporosis among Underweight and Obese Sedentary Young Women

88%
Habibzadeh N.
Baltic Journal of Health and Physical Activity
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2010
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vol. 2
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issue 2
97-103
EN
Background: The purpose of the present study was to examine the effect of a walking program on bone mass density (BMD) among healthy obese and thin young girls./Material/Methods: Twenty untrained obese (n=10) and thin (n=10) girls, 20-25 years, volunteered to participate in this study. Before and after the training program both groups had an anthropometric measurement, a blood analysis and a BMD evaluation. Each walking session consisted of 30 minutes walking between 50-75% of maximal heart rate, 3 days per week for 2 months.Results: After the exercise program, BMD in both regions (hip (1.1%) and spine (L2- L4) (2.3%)) stabilized in both groups (p<0.05). Percent body fat, fat mass and lean mass were affected positively by exercise program (all p = 0.000). No significant change was observed in Serum estrogen calcium, phosphorus in either group (p>0.05).Conclusions: This study showed that activities such as walking provide significant loading, which positively influences BMD in young thin and obese girls. This result suggests that both thin and obese women can reduce the risk of bone loss by increasing their level of activity.
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