Document Type : Original Article
Authors
1
Department of Sports Biomechanics, Faculty of Physical Education and Sports Science, CT.C,, Islamic Azad University, Tehran, Iran
2
Department of Biomechanics and Sport Injuries,, Kharazmi University, Tehran, Iran
3
Department of Sport Biomechanics and Rehabilitation, Kinesiology Research Center, Kharazmi University, Tehran, Iran
4
Department of Mechanical Engineering, CT.C,, Islamic Azad University, Tehran, Iran
Abstract
Purpose:
Osteoporosis is one of the most prevalent systemic bone diseases. The present study aimed to investigate the effects of 12 weeks of aquatic and land-based exercise on bone mineral density and postural balance in postmenopausal women with osteoporosis.
Methods:
This semi-experimental study was conducted on 36 women aged 50 to 65 years diagnosed with osteoporosis. Participants were randomly assigned to three groups: aquatic exercise, land-based exercise, and control. The intervention groups performed balance-strength training for 12 weeks (three sessions per week). Bone mineral density (BMD) of the femoral neck and lumbar spine, as well as postural balance, were assessed by calculating the mean center of pressure (COP) velocity in anterior-posterior (AP) and medial-lateral (ML) directions during four static balance tests: (1) two-legged stand with eyes open (TLEO), (2) two-legged stand with eyes closed (TLEC), (3) semi-tandem stand with eyes open (STEO), and (4) semi-tandem stand with eyes closed (STEC). Data were analyzed using paired t-tests and ANCOVA in SPSS.
Results:
Significant between-group differences were observed in BMD and functional balance between the exercise and control groups (p<0.001, η²≥0.14). Compared to the aquatic group, the land-based exercise group showed greater improvements in BMD with larger effect sizes. Conversely, the aquatic group demonstrated significantly greater improvements in balance performance in TLEO and STEC (AP and ML), as well as in TLEC (ML), compared to the land-based group (p≤0.05, η²≥0.14).
Conclusion:
Land-based balance-strength exercises significantly improve bone mineral density, while aquatic exercises markedly enhance functional balance in postmenopausal women with osteoporosis. Therefore, combining both modalities may offer an effective strategy for managing osteoporosis.
Keywords
)