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上肢阻力式結合振動式訓練對瘦弱女性骨質密度和骨骼代謝之影響

Effects of Combined Upper Body Resistance and Vibration Training on Bone Mineral Density and Bone Turnover Biomarkers in Untrained Weak Women

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摘要


目的:探討上肢阻力式結合振動式訓練對瘦弱女性骨質密度和骨骼代謝之影響。方法:篩選召募30個受試者,年齡18-22歲,身體質量指數較低(BMI<18.5)的非訓練年輕女性為研究對象,阻力式訓練組10人、阻力式結合振動式訓練組10人及控制組10人。兩組訓練組均於每週一、三、五進行阻力訓練,每次1-3組,每組12-15下,訓練時間30-50分鐘,強度範圍為1RM的60-70%,包含全身八種訓練動作;另外,阻力式結合振動式訓練組先進行完阻力式訓練後再額外進行上肢振動式訓練,以頻率40Hz及振幅4g方式於每週一、三、五,每次3-5組,每組60秒,組間休息30秒,非慣用手的方式進行;控制組未進行任何訓練。所有受試者於訓練前後測量下列變項:(1)身體質量指數:體重(kg)/身高^2(m)來換算;(2)骨質密度以雙能量X光吸收儀(dual energy X-ray absorptiometry, DEXA)測量左右手前臂、腰椎第1-4節、股骨頸等部位骨質密度及骨質含量;(3)骨骼代謝指標:骨鈣素(osteocalcin, OCN)、碳末端胜鏈(C-terminal telopeptide, CTx)。所得資料以二因子混合設計變異數分析考驗三組的前、後測試是否有顯著差異。結果:16週阻力式結合振動式訓練介入,在前臂、腰椎、和股骨頸等部位骨質密度均未達顯著差異(p>.05),在骨骼代謝血液分析OCN和CTx均未達顯著差異(p>.05)。結論:16週上肢阻力式結合振動式訓練無法明顯改善瘦弱女性骨質密度和骨骼代謝,但本研究提供器材研發上不同的思維和想法,後續將改良震動的型式和運動處方介入的模式。

並列摘要


The purpose of this study was to examine the effects of combined resistance and vibration training on bone mineral density and bone turnover markers in untrained weak women. Thirty subjects were recruited from untrained young women of body mass index (BMI<18.5) accomplished the programs. They were including resistance training (RT, n=10), combined resistance and vibration training (RT+VT, n=10) and control group (CON, n=10). The resistance training protocol was eight exercises consisted of whole body, 1-3 sets, 12-15 repetitions with 60-70% 1RM and 30-50 min of resistance training groups, with training 3 times (Mon., Wed., and Fri.) per week. RT+VT group had received upper body vibration exercise after resistance training. It was composed of 60 seconds on/ 30 seconds off arm curved positioning in frequency of 40 Hz and amplitude of 4g and would be repeated 3-5 times in a training set. Control group maintained their regular lifestyles without training. The following dependent variables of all subjects were measured before and after 16 weeks of training: 1) Body mass index (BMI) by measuring weight (kg) and height (m), 2) Bone mineral density (BMD) of the left and right forearm, at lumbar (L1-4), and femoral neck using a dual energy X-ray absorptiometry (DEXA), and 3) Bone turnover markers: measuring plasma osteocalcin (OCN) and C-terminal telopeptide (CTx). The collected data were analyzed by two-way analysis of variance (group × time) with repeated measures to examine after training. The results indicated that the bone mineral density (forearm, lumbar, and femoral neck) and bone turnover biomarkers (OCN, and CTx) showed no changes (p>.05) among three groups after 16-week of RT or RT+VT. We concluded that there are no effects on bone mineral density and bone turnover markers after combined resistance and vibration training in untrained weak women. But this study provided the thinking on vibration training machine and exercise prescription design.

並列關鍵字

vibration training bone mineral density OCN CTx

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