ACSM annual meeting, 2011;
12-weeks of Whole Body Vibration with Resistance Exercise is Osteogenic at the Spine
Jahr: 2011
Almstedt HC, Urbinati CR, Ligouri GC, Spiegel M, Stapleton MR, Shoepe TC
Loyola Marymount University, Los Angeles, CA, Human Performance Laboratory
Abstract
Evidence supports weight-bearing activity as a means to increase bone mineral density (BMD) and lower risk for osteoporosis. Whole body vibration (WBV) training is a novel technique that has been minimally explored for its potential to influence bone health. Of note is the lack of independent research explaining health outcomes of WBV training. PURPOSE: Our aim was to evaluate whether WBV with resistance exercise could increase BMD at the spine. METHODS: We recruited 24 men and women between the ages of 18-23; 10 volunteers (6 male and 4 female) performed WBV exercise training, 3 times per week, for 12 weeks, while the remaining 14 subjects (4 male and 10 female) served as controls. WBV training on the Vibraflex 550 (Orthometrix, Naples, FL), began with static standing and progressed to include squat, deadlift, lunge, rowing, and push-up exercises. Frequency (15-26 Hz) of vibration, duration, repetitions, and the number of exercises varied systematically over 12 weeks. BMD at the anterior-posterior (AP) and lateral spine was measured using dual-energy x-ray absorptiometry (DXA, Hologic, Waltham, MA) before and after the 12-week program. Serum bone-specific alkaline phosphatase (BSAP) was evaluated in a subsample of participants via enzyme-linked immunosorbant assay (Quidel, Santa Clara, CA). RESULTS: At baseline, groups were statistically similar in age, height, weight, body mass index, calcium intake, and kilocalorie consumption. BMD at the AP spine and lateral spine was also similar between groups at baseline. A two-tailed t-test revealed significant differences (p=0.013) in the change in BMD at the lateral spine between the control (-0.0149±0.010 g/cm2) and WBV group (0.0221±0.012 g/cm2) with a trend for differences at the AP spine (-0.0087±0.007 g/cm2 vs. 0.0089±0.007 g/cm2, p=0.089). A t-test comparing BSAP of the WBV (31.39±10.79 U/L) and control groups (22.63±4.74 U/L) suggest higher levels of formation markers for the trained individuals (p=0.086). CONCLUSION: In this 12-week intervention, the WBV group experienced a 2.2% increase in BMD at the lateral spine (p=0.013) while the control group decreased 1.7%. These preliminary results suggest that WBV with resistance exercise is a potential training method that can be used to increase BMD, and thereby lower future risk of osteoporosis.Schlagworte: lumbar spine, BMD, BMC, Bone Density Spine, Boen formation Markers
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GID: 2683; Letzte Änderung: 26.07.2011
