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Magnetic Resonance Materials in Physics, Biology and Medicine

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01-08-2012 | Research Article

Diffusion property differences of the lower leg musculature between athletes and non-athletes using 1.5T MRI

Authors: Yoshikazu Okamoto, Shintaro Mori, Yuka Kujiraoka, Katsuhiro Nasu, Yuji Hirano, Manabu Minami

Published in: Magnetic Resonance Materials in Physics, Biology and Medicine | Issue 4/2012

Abstract

Object

To compare the differences in diffusion properties—namely fractional anisotropy (FA), three eigenvalues of the diffusion tensor (λ1, λ2, and λ3), and apparent diffusion coefficient (ADC)—between athletically-trained and untrained lower leg musculature.

Materials and methods

Twelve athletes (Group A) and 11 non-athletes (Group B) were recruited. All were females in their 20s. We scanned diffusion tensor images of both calves and compared FA, the three eigenvalues, and ADC in the gastrocnemius medialis, gastrocnemius lateralis, soleus (SOL), and anterior tibialis muscles between Groups A and B, and between the right and left sides, using two-factor fractional ANOVA.

Results

In all muscles of bilateral calves, all three eigenvalues and ADC were lower in Group A than in Group B, with statistically significant differences in all muscles for λ1, λ2, and λ3 and ADC, with a P value of <0.01. Moreover, statistical differences were also found between right and left for λ1, λ2, and λ3 (P < 0.05), and ADC (P < 0.01) of the SOL muscle. FA showed no statistically significant differences in any muscles.

Conclusions

Our results indicate that training causes a decrease of the three eigenvalues and ADC, which we hypothesize is due to an increase of density of myofilaments in the intracellular space, and deformation of the cell induced by enlargement of extracellular components.

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Title: Diffusion property differences of the lower leg musculature between athletes and non-athletes using 1.5T MRI
Authors: Yoshikazu Okamoto
Shintaro Mori
Yuka Kujiraoka
Katsuhiro Nasu
Yuji Hirano
Manabu Minami
Publication date: 01-08-2012
Publisher: Springer-Verlag
Published in: Magnetic Resonance Materials in Physics, Biology and Medicine / Issue 4/2012
Print ISSN: 0968-5243
Electronic ISSN: 1352-8661
DOI: https://doi.org/10.1007/s10334-011-0294-3

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Springer Medicine

Diffusion property differences of the lower leg musculature between athletes and non-athletes using 1.5T MRI

Abstract

Object

Materials and methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Object

Materials and methods

Results

Conclusions

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