TY - JOUR
T1 - Weight lifted in strength training predicts bone change in postmenopausal women
AU - Cussler, Ellen C.
AU - Lohman, Timothy G
AU - Going, Scott B.
AU - Houtkooper, Linda K
AU - Metcalfe, Lauve L.
AU - Flint-Wagner, Hilary G.
AU - Harris, Robin B.
AU - Teixeira, Pedro J.
PY - 2003/1/1
Y1 - 2003/1/1
N2 - Purpose: The aim of this study was to examine the relationship between weight lifted in 1 yr of progressive strength training and change in bone mineral density (BMD) in a group of calcium-replete, postmenopausal women. Methods: As part of a large clinical trial, 140 calcium-supplemented women, 44-66 yr old, were randomized to a 1-yr progressive strength-training program. Half of the women were using hormone replacement therapy. Three times weekly, subjects completed two sets of six to eight repetitions in eight core exercises at 70-80% of one repetition maximum. BMD was measured at baseline and 1 yr. Results: In multiple linear regression, the increase in femur trochanter (FT) BMD was positively related to total weight lifted (0.001 g·cm-2 for a SD of weight lifted, P<0.01) after adjusting for age, baseline factors, HRT status, weight change, cohort, and fitness center. The weighted squats showed the strongest (0.002 g·cm-2 for a SD of weight lifted, P<0.001), whereas the back extension exhibited the weakest (0.0005 g·cm-2 for a SD of weight lifted, P<0.26) association with change in FT BMD. The amount of weight lifted in the weighted march exercise was significantly related to total body BMD (0.0006 g·cm-2 for a SD of weight lifted, P<0.01). The associations between weight lifted and BMD for the femur neck or lumbar spine were not significant. Conclusion: Evidence of a linear relationship between BMD change and total and exercise-specific weight lifted in a 1-yr strength-training program reinforces the positive association between this type of exercise and BMD in postmenopausal women.
AB - Purpose: The aim of this study was to examine the relationship between weight lifted in 1 yr of progressive strength training and change in bone mineral density (BMD) in a group of calcium-replete, postmenopausal women. Methods: As part of a large clinical trial, 140 calcium-supplemented women, 44-66 yr old, were randomized to a 1-yr progressive strength-training program. Half of the women were using hormone replacement therapy. Three times weekly, subjects completed two sets of six to eight repetitions in eight core exercises at 70-80% of one repetition maximum. BMD was measured at baseline and 1 yr. Results: In multiple linear regression, the increase in femur trochanter (FT) BMD was positively related to total weight lifted (0.001 g·cm-2 for a SD of weight lifted, P<0.01) after adjusting for age, baseline factors, HRT status, weight change, cohort, and fitness center. The weighted squats showed the strongest (0.002 g·cm-2 for a SD of weight lifted, P<0.001), whereas the back extension exhibited the weakest (0.0005 g·cm-2 for a SD of weight lifted, P<0.26) association with change in FT BMD. The amount of weight lifted in the weighted march exercise was significantly related to total body BMD (0.0006 g·cm-2 for a SD of weight lifted, P<0.01). The associations between weight lifted and BMD for the femur neck or lumbar spine were not significant. Conclusion: Evidence of a linear relationship between BMD change and total and exercise-specific weight lifted in a 1-yr strength-training program reinforces the positive association between this type of exercise and BMD in postmenopausal women.
KW - Bone mineral density
KW - Osteoporosis
KW - Weight lifting
KW - Women
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U2 - 10.1097/00005768-200301000-00003
DO - 10.1097/00005768-200301000-00003
M3 - Article
C2 - 12544629
AN - SCOPUS:0037229060
SN - 0195-9131
VL - 35
SP - 10
EP - 17
JO - Medicine and Science in Sports and Exercise
JF - Medicine and Science in Sports and Exercise
IS - 1
ER -