Document Detail

High thigh muscle strength but not bone mass in young horseback-riding females.
MedLine Citation:
PMID:  9576976     Owner:  NLM     Status:  MEDLINE    
To evaluate whether the type of weight-bearing loading subjected to the skeleton during horseback-riding was associated with differences in bone mass and muscle strength of the thigh, we investigated bone mass and isokinetic muscle strength in 20 female horse riders (age 17.9 +/- 0.6 years) who were riding 7.0 +/- 3.4 hours/week, and 20 nonactive females (age 17.8 +/- 1.1 years). The groups were matched according to age, weight, and height. Areal bone mineral density was measured in total body, head, lumbar spine, right femoral neck, Ward's triangle, and trochanter, the whole dominant and nondominant humerus, and in specific sites in the right femur diaphysis, distal femur, proximal tibia, and tibia diaphysis using dual X-ray absorptiometry. Isokinetic concentric and eccentric peak torque of the quadricep and hamstring muscles were measured using an isokinetic dynamometer. There were no significant differences in bone mass between the horseback riders and nonactives at any site measured. The horse riders were significantly (P < 0.05-0.01) stronger in concentric hamstrings strength at 90 degrees/second and 225 degrees/second and in eccentric quadricep and hamstring strength at 90 degrees/second. Horseback riding in young females is associated with a high muscle strength of the thigh, but not with a high bone mass.
H Alfredson; G Hedberg; E Bergström; P Nordström; R Lorentzon
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Calcified tissue international     Volume:  62     ISSN:  0171-967X     ISO Abbreviation:  Calcif. Tissue Int.     Publication Date:  1998 Jun 
Date Detail:
Created Date:  1998-06-16     Completed Date:  1998-06-16     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7905481     Medline TA:  Calcif Tissue Int     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  497-501     Citation Subset:  IM    
Sports Medicine Unit, University of Umeâ, Umeâ, Sweden.
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MeSH Terms
Bone Density*
Bone and Bones / physiology
Femur / physiology*
Muscle, Skeletal / physiology*
Sports / physiology*

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