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KMID : 0359420030210020176
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Korean Journal of Sports Medicine
2003 Volume.21 No. 2 p.176 ~ p.183
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Relationship of Isokinetic Flexion and Extension Muscle Strength, Muscle Mass to Bone Mineral Density in Body Limbs
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Jeong Il-Gyu
Yoon Jin-Hwan
Kim Jong-Oh
Yoon Jae-Suk
Byun Jea-Joung
Lee Mi-Suk
Kim Young-Pyo
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Abstract
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The purpose of this study was to investigate the relationship among Isokinetic Muscle Strength, Muscle Mass and Bone Mineral Density in Body Segments. The subjects in this study were 12 males(age, 19.66±1.72yr; height, 172.66±4.92cm; weight, 66.45±8.22kg; fat, 15.95±5.42%). In all subjects, BMD in body segments was measu- red using Sunlight Omnisense TM(Italy). Flexion and extension strength of knee and elbow were measured using a Biodex isokinetic dynamometer(Biodex Co, New York, USA). BMD correlated significantly with Muscle mass (r=0.345, p<0.05), Extension average power(r=0.535, p<0.05), Flexion average power(r=0.503, p<0.05), Exten sion peak torque(r=0.454, p<0.05), Flexion peak torque(r=0.416, p<0.05), Extension enduranceratio(r=0.287, p<0.05). Regression of BMD indicated that the explanation 28.6% with extension average power, 25.3% with flexion average power, 20.65% with extension peak torque, 17.3% with flexion peak torque, 8.3% with flexion endurance ratio. Regression of BMD increased 34.7% with extension average power, flexion average power, extension peak torque, flexion peak torque, and flexion endurance ratio. In conclusion, These findings suggest that Muscle power training increase regional bone mineral density.
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KEYWORD
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Bone mineral density, Isokinetic mscle strength, Muscle mass
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