Document Detail

Osteogenic index and changes in bone markers during a jump training program: a pilot study.
MedLine Citation:
PMID:  20139789     Owner:  NLM     Status:  MEDLINE    
PURPOSE: This study was designed as a proof-of-concept study to assess the osteogenic index (OI) and changes in bone markers during an 8-wk jump training program. On the basis of the OI, jumps were completed in one or two daily sessions with total jumps per day being equal.
METHODS: Seven males served as controls and participated in their normal strength training program. Fourteen males were divided into two groups, jumping once daily (J1x) or jumping twice daily (J2x), with a 6-h recovery period between sessions (J2x only). Jumping-type exercises were performed on a Plyo Press and started at 20 plyo-jumps per day, three times per week and progressed to 60 plyo-jumps per day, three times per week for the last 3 wk. Blood samples were collected at baseline and at 4 and 8 wk to determine serum concentrations of bone-specific alkaline phosphate and C-terminal telopeptides of type I collagen.
RESULTS: OI for each session and week were different (P < 0.05) between the two jumping groups (baseline OI per week, J1x = 28 +/- 0.9, J2x = 34 +/- 0.9). There was a significant change (P = 0.005) in bone-specific alkaline phosphate over time, with 8-wk values being significantly higher than baseline values (change from baseline: J1x = 2.7 +/- 1.4 microg.L-1, J2x = 3.5 +/- 1.3 microg.L-1). J2x had an overall mean change significantly different from zero. C-terminal telopeptides of type I collagen did not change significantly during the 8 wk.
CONCLUSIONS: The data demonstrate that the bone of young adult males does respond to a high-impact exercise. In addition, compared with completing all plyo-jumps in one session, the use of recovery periods between exercise sessions on the same day may result in positive changes in bone turnover, indicative of an osteogenic effect. The beneficial impact of the OI and how it can be used to design programs to influence bone turnover still remain to be determined.
Christina R Erickson; Matthew D Vukovich
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  42     ISSN:  1530-0315     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-07-27     Completed Date:  2010-11-12     Revised Date:  2012-04-24    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1485-92     Citation Subset:  IM; S    
Human Performance Laboratory, HPER Department, South Dakota State University, Brookings, SD, USA.
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MeSH Terms
Alkaline Phosphatase / blood
Biological Markers / analysis
Bone and Bones / chemistry,  physiology
Collagen Type I / blood
Exercise / physiology*
Muscle Strength / physiology
Osteogenesis / physiology*
Pilot Projects
Young Adult
Reg. No./Substance:
0/Biological Markers; 0/Collagen Type I; EC protein, human; EC Phosphatase
Erratum In:
Med Sci Sports Exerc. 2012 Apr;44(4):770

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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