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High‐impact Step‐aerobic and Progressive Strength Training on Bone Mineral Density in Sedentary Young Women
Author(s) -
Liang Michael T.C.,
Arnaud Sara B,
Bassin Stanley L,
Dutto Darren,
Braun William A,
Wong Nathan D,
Pontello Andria M,
Cooper Dan M
Publication year - 2006
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.20.5.lb27-b
Subject(s) - bone mineral , heel , medicine , aerobic exercise , physical therapy , intensity (physics) , osteoporosis , anatomy , physics , quantum mechanics
The purpose of this study was to compare high‐impact loaded aerobic exercise and high‐intensity strength training on areal bone mineral density (BMD) of the loaded bones in sedentary women, age 20–35 years. Subjects were randomly assigned to: high impact‐loaded step aerobic exercise (SA, n=25), high‐intensity lower body strength training (ST, n=21) or non‐exercise control (CON, n=21). Group differences in BMD were analyzed using ANCOVA. At the 6‐month assessment, changes in BMD of the heel (3.5%) and leg (0.9%) were greater (both p<0.05) in the SA than the ST, and change in BMD of total hip and Ward's triangle were greater (p<0.05) in ST (0.3%) than SA (−1.1%). At the 12‐month assessment, changes in BMD of the heel in the SA group continued to increase (4.4%, p<0.05). In sedentary young women high‐impact activities applied to the heel and lower leg bones produce a positive change in BMD of these two bones, not in bones that are distant from the site of impact. High‐intensity strength training of the lower limbs produces a positive change in BMD of the hip and Ward's triangle and not in sites that were distant from the applied force, lumbar spine.