Acute response of biochemical bone turnover markers to high-impact exercise in postmenopausal women
ISPAH ePoster Library. Suganda Prawiradilaga R. Oct 15, 2018; 225227
Mr. Rizky Suganda Prawiradilaga
Mr. Rizky Suganda Prawiradilaga
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Abstract Over three days, twenty-nine postmenopausal women (60.03±5.58 years) were randomly assigned to 6x10 repetitions of three different jumps: Counter-movement(G), Diagonal(D), and Plinth(P). A fourth day without jumping served as control(C). Blood samples were collected before(PRE), immediately-after(POST), and 2 hours after exercise(2Hr). Ground reaction forces (GRF) in three directions were measured.The bone formation marker procollagen type-1 N-terminal propeptide(P1NP) increased (p<0.01) by 8.01±1.83%, 11.80±1.63%, 10.20±1.25% at POST for G, D, and P respectively and the increase was 11.45±1.84%, 15.26±2.20%, and 13.51±1.91% higher (<0.01) than for C. The bone formation marker Osteocalcin(OC) increased 5.19±1.76% (p=0.046) at POST for P, which was 9.12±2.18% higher (p=0.02) than for C. OC 2Hr decreased (p<0.01) by -7.65±1.46%, -8.62±3.71%, and -10.15±1.67% compared to PRE for G, P, and C respectively. The bone resorption marker C-terminal telopeptide of type-1 collagen(CTX-1) 2Hr decreased (p<0.001) by -15.27±2.42%, -13.73±13.15%, -17.41±2.34%, and -15.38±2.11% compared to PRE for G, D, P, and C respectively. The sagittal(Fx) GRF of P was 0.211±0.05 body-weight(BW) higher (p=0.003) than G and 0.158±0.04BW higher than D (p=0.003). The transversal(Fy) GRF of D was 0.122±0.03BW higher (p=0.003) than G and 0.072±0.02BW higher (p=0.02) than P. The P1NP change at POST for G correlated with Fy(r2=0.463, p=0.046), Fz(r2=0.605, p=0.006), and the combined three-axis GRFs(r2=0.456, p=0.024).The acute significant increase in P1NP and OC without any increase in CTX-1 after all high-impact jumps indicate a change in bone turnover in favor of bone formation, without any change in bone resorption. This indicates that high-impact exercise for postmenopausal women activates bone modeling.
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