Bone density and muscle strength are the primary determinants of bone strength. Measurements of grip strength is less costly, less invasive and in combination with metacarpal bone mineral density (BMD) measurements could provide a feasible way of predicting bone mineral density.150 hospital staff members and employees participated voluntarily in the study. Osteoporotic risk evaluation was done; they were questioned about profession and leisure time activities, tobacco and alcohol consumption; body weight-height-body mass indeks (BMI) were calculated. Right and left hand grip strength were measured using hydraulic hand dynamometer; BMD was measured by radiographic absorbsiometry in both hands.The mean age was 46 (30-68 years), 80% of the subjects were categorized as normal, 18% osteopenic and 1% osteoporotic. The mean value of BMI was 26.86 kg/m2 and handgrip strength was 37 kg. 78% were white collared, 12% were computer users, 40.4% consumed tobacco and their BMD were lower (p 0.0001). Their handgrip strength was also lower in both hands (p 0.01 for right hand, p 0.05 for left hand). There was no statistically significant difference between the dominant hand and non-dominant hand, but bone density was higher at the dominant side (p 0.0001). There were statistically significant relationship between the handgrip strength and bone density on both sides (p 0.0001). Age and BMI didn’t correlate with handgrip strength and bone density.Muscle strength is not adequate substitute for bone densitometry, but it can help to identify the risk groups which can be directed to bone density measurement.Key words: Metacarpal bone mass, handgrip strength
Article in Turkish(Use the link for full-text in Turkish)
GIRIS
Erkeklerde saglikli iskelet yapisinin temel belirleyicileri arasinda kemik pik kitlesinin olusumu, yasa bagli kemik kayiplari (kemik kitlesi ve kemik mimarisi degisiklikleri) ve kemik kayiplarina sebep olan faktörler (growth faktör etkisi, kalsiyum alimi, vücut agirligi ve fiziksel aktivite, gonadal fonksiyon degisiklikleri) yer alir.Kas gücü ile lokal kemik mineral yogunlugu (KMY) arasindaki pozitif korelasyonu gösteren pek çok çalisma vardir (2,3,4,5,6,3,4,5,6,7). Bu korelasyonu göstermeyen çalismalar da olmakla beraber, güncel yaklasimda kas gücünün kemik kitlesine etkisinin bir tarafa spesifik olmayip sistemik oldugu görüsü kabul edilir (3). Tartismali sonuçlarin olmasi arastirilamayan degiskenlerin kas gücünü ve KMY’nu etkileyebilmesi olabilir zira pek çok faktörün etkisi söz konusudur (1,2).Erkeklerde egzersizin iskelet sistemine etkisini gösteren az sayida randomize prospektif çalisma oldugu için, biz kas gücü ile kemik yogunlugu arasindaki iliskiyi kavrama gücü ile degerlendirdik. Li ve arkadaslarinin hayvan deneyi seklindeki çalismalari kas gücüyle kemik gücünün güçlü iliskisini in-vivo olarak göstermistir (5).Kemik yogunlugu ve kas gücünü etkileyebilecek bazi faktörleri dislamak için “saglikli” erkek grubunda, el kavrama gücüyle yine elden yapilan KMY degerlendirmeleri arasindaki iliskiyi incelemek üzere çalismamizi planladik.
