title: Effects of exercise training with weighted vests on bone turnover and isokinetic strength in postmenopausal women.
abstract: The effects of 12 wk of exercise training using weighted vests on bone turnover and isokinetic strength were evaluated in postmenopausal women randomly assigned as exercisers (EX; n = 9) or controls (CON; n = 7). Training included 3 multimodal exercise sessions per wk wearing weighted vests. The vest load was progressively increased each wk to a maximum of 15% of body weight. Bone turnover was determined from resting levels of serum osteocalcin and NTx. Knee and ankle strength were measured at 60 degrees/s and 180 degrees/s using an isokinetic dynamometer. After 12 wk, NTx decreased by 14.5% (P <or= .05) in EX, with no significant changes in osteocalcin. EX also showed a 40% (P <or= .05) improvement in ankle plantar-flexion strength at 60 degrees/s. Relative body fat significantly decreased and fat-free mass increased in EX. Exercise compliance was 80%. These findings support the use of progressive exercise training using weighted vests in postmenopausal women.
authors.affiliation: Faculty of Applied Health Sciences, Brock University, St. Catharines, Ontario, Canada.
authors.forename: Panagiota
authors.initials: P
authors.lastname: Klentrou
authors.forename: Jill
authors.initials: J
authors.lastname: Slack
authors.forename: Brian
authors.initials: B
authors.lastname: Roy
authors.forename: Michael
authors.initials: M
authors.lastname: Ladouceur
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D015415:Biomarkers / Q000097:blood; D016723:Bone Remodeling / Q000502:physiology*; D024042:Collagen Type I / Q000097:blood; D015444:Exercise / Q000502:physiology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D053580:Muscle Strength; D015675:Osteocalcin / Q000097:blood; D010455:Peptides / Q000097:blood; D017698:Postmenopause; D019415:Torque; D016474:Weight-Bearing
chemical_list: D015415:Biomarkers; D024042:Collagen Type I; D010455:Peptides; C052929:collagen type I trimeric cross-linked peptide; D015675:Osteocalcin