Effect of low-repetition jump training on bone mineral density in young women

J Appl Physiol (1985). 2006 Mar;100(3):839-43. doi: 10.1152/japplphysiol.00666.2005. Epub 2005 Nov 3.


The hypothesis of the present study was that low-repetition and high-impact training of 10 maximum vertical jumps/day, 3 times/wk would be effective for improving bone mineral density (BMD) in ordinary young women. Thirty-six female college students, with mean age, height, and weight of 20.7+/-0.7 yr, 158.9+/-4.6 cm, and 50.4+/-5.5 kg, respectively, were randomly divided into two groups: jump training and a control group. After the 6 mo of maximum vertical jumping exercise intervention, BMD in the femoral neck region significantly increased in the jump group from the baseline (0.984+/-0.081 vs. 1.010+/-0.080 mg/cm2; P<0.01), although there was no significant change in the control group (0.985+/-0.0143 vs. 0.974+/-0.134 mg/cm2). And also lumbar spine (L2-4) BMD significantly increased in the jump training group from the baseline (0.991+/-0.115 vs. 1.015+/-0.113 mg/cm2; P<0.01), whereas no significant change was observed in the control group (1.007+/-0.113 vs. 1.013+/-0.110 mg/cm2). No significant interactions were observed at other measurement sites, Ward's triangle, greater trochanter, and total hip BMD. Calcium intakes and accelometry-determined physical daily activity showed no significant difference between the two groups. From the results of the present study, low-repetition and high-impact jumps enhanced BMD at the specific bone sites in young women who had almost reached the age of peak bone mass.

Publication types

  • Randomized Controlled Trial

MeSH terms

  • Absorptiometry, Photon
  • Adult
  • Aging / physiology*
  • Amino Acids / urine
  • Analysis of Variance
  • Bone Density / physiology*
  • Bone Resorption / physiopathology
  • Calcium / analysis
  • Calcium, Dietary / metabolism
  • Exercise / physiology*
  • Female
  • Femur Neck / chemistry
  • Femur Neck / physiology
  • Humans
  • Lumbar Vertebrae / chemistry
  • Lumbar Vertebrae / physiology


  • Amino Acids
  • Calcium, Dietary
  • deoxypyridinoline
  • Calcium