Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2009) 08, 553 - 559

Research article
Short-Term Bone Biochemical Response to a Single Bout of High-Impact Exercise
Timo Rantalainen1, , Ari Heinonen2, Vesa Linnamo2, Paavo V. Komi2, Timo E. S. Takala3, Heikki Kainulainen1
Author Information
1 Neuromuscular Research Center, Department of Biology of Physical Activity,
2 Department of Health Sciences, University of Jyväskylä, Finland
3 Department of Sports Medicine, Oulu Deaconess Institute, Oulu, Finland.

Timo Rantalainen
✉ University of Jyväskylä, P. O. Box 35, 40014 Jyväskylä, Finland
Email: timo.j.rantalainen@jyu.fi
Publish Date
Received: 23-04-2009
Accepted: 25-08-2009
Published (online): 01-12-2009
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ABSTRACT

Bone response to a single bout of exercise can be observed with biochemical markers of bone formation and resorption. The purpose of this study was to examine the response of bone biochemical markers to a single bout of exhaustive high-impact exercise. 15 physically active young subjects volunteered to participate. The subjects performed continuous bilateral jumping with the ankle plantarflexors at 65 % of maximal ground reaction force (GRF) until exhaustion. Loading was characterized by analyzing the GRF recorded for the duration of the exercise. Venous blood samples were taken at baseline, immediately after, 2h and on day 1 and day 2 after the exercise. Procollagen type I amino terminal propeptide (P1NP, marker of bone formation) and carboxyterminal crosslinked telopeptide (CTx, marker of bone resorption) were analyzed from the blood samples. CTx increased significantly (32 %, p = 0.015) two days after the exercise and there was a tendensy towards increase seen in P1NP (p = 0.053) one day after the exercise. A significant positive correlation (r = 0.49 to 0.69, p ≤ 0.038) was observed between change in P1NP from baseline to day 1 and exercise variables (maximal slope of acceleration, body weight (BW) adjusted maximal GRF, BW adjusted GRF exercise intensity and osteogenic index). Based on the two biochemical bone turnover markers, it can be concluded that bone turnover is increased in response to a very strenuous single bout of exhaustive high-impact exercise.

Key words: Bone biochemical marker, jumping, bone turnover, osteogenic index


           Key Points
  • Studies on bone acute biochemical response to loading have yielded unequivocal results.
  • There is a paucity of research on the biochemical bone response to high impact exercise.
  • An increase in bone turnover was observed one to two days post exercise.
 
 
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