Journal article
Validation of an MRI analysis for thigh muscle and fat composition changes in strength training
Journal of Science and Medicine in Sport, Vol.9(suppl. 1), p.42
2006
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Abstract
<p>This pilot study aimed to validate an MRI analysis for thigh muscle and fat composition changes following strength training. Fifteen healthy men were randomly assigned into a control (CG), voluntary isometric knee extension (VG) or electromyostimualtion superimposed voluntary training (EG) group. Subjects trained the right leg three sessions per week for 6 weeks. MRI images of both thighs were obtained using a 1.5-T system, and analysed using ImageJ software. The cross-sectional areas of the thigh (CSA-T), fat (CSA-F) and muscle (CSA-M) tissues in MRI images, and circumferences and skinfolds, were measured at middle-point of the thigh, and at 5 cm above and 5 cm below this point. Analyses of 30 images in different formats (8- and 16-bit) were replicated to examine the reproducibility. Results showed high levels of reproducibility within either the 8- or 16-bit images (ICC 0.96–0.99). However, significant differences existed between the measurements of the two formats of images. From the results of all subjects, both CSA-T and CSA-M (in 8-bit images) showed a high correlation with the circumference (Pearson correlation r = 0.99 and r = 0.82, p < 0.01), while CSA-F was well correlated with the skinfold (r = 0.90, p < 0.01). Comparing the pre and post training measurements, variations in CSA-M of the trained limb of VG, EG and CG were +5%, +6% and +0.4%, and that of the untrained limb were +3%, +4% and +0.3%; and that in CSA-F of the trained limb were −1%, −19% and −10%, and that of the untrained limb were +0.6%, −14% and −7%, respectively, although these variations were not statistically significant.</p>
Details
- Title
- Validation of an MRI analysis for thigh muscle and fat composition changes in strength training
- Creators
- Pedro Bezerra - Southern Cross UniversityShi Zhou - Southern Cross UniversityAllan J Davie - Southern Cross UniversityHuddy Fuller - Southern Cross UniversityAndrew Hooper - North Coast Radiology
- Publication Details
- Journal of Science and Medicine in Sport, Vol.9(suppl. 1), p.42
- Identifiers
- 1418; 991012821594402368
- Academic Unit
- Human Sciences; Faculty of Health; School of Health and Human Sciences
- Resource Type
- Journal article