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The Journal of Sports Medicine and Physical Fitness 2012 October;52(5):506-12

Copyright © 2012 EDIZIONI MINERVA MEDICA

lingua: Inglese

The influence of time-of-day variation and loading on the aponeurosis plantaris pedis: an ultrasonographic study

Skou S. T. 1, 2, Rathleff M. S. 1, Moelgaard C. M. 2, 3, Rasmussen S. 1, Olesen J. L. 4

1 Orthopedic Surgery Research Unit, Aalborg Hospital, Aarhus University Hospital, Aalborg, Denmark; 2 Department of Health Science and Technology, Aalborg University, Aalborg, Denmark; 3 Department of Occupational and Physiotherapy, Aalborg Hospital, Aarhus University Hospital, Aalborg, Denmark; 4 Department of Rheumatology, Aalborg Hospital, Aarhus University Hospital, Aalborg, Denmark


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AIM: The aim of this paper was to investigate the effect of time-of-day on the thickness of the the aponeurosis plantaris pedis, and to examine the acute effects of high-load strength training and long distance running on the thickness of the aponeurosis plantaris pedis.
METHODS: Proximal aponeurosis plantaris pedis thickness was assessed with a 13-MHz linear-array transducer. In sub-study 1, ten participants (ten aponeurosis’) were measured five times during 24 hours. In sub-study 2, ten participants (ten aponeurosis’) were measured just before, immediately after and again three hours after 3x12 unilateral heel-rises. In sub-study 3, 11 healthy experienced runners (11 aponeurosis’) were measured just before, immediately after and two hours after a 15km run. The average thickness of three scans of each foot was used in the analysis. The data was analysed using repeated measures one-way ANOVA.
RESULTS: The mean thickness of the aponeurosis plantaris pedis’ fluctuated significantly during the 24 hours (p=0,02), but it did not change in relation to the high-load strength training (p=0,86) or 15km of running (p = 0,70).
CONCLUSION: High-load strength training and long distance running do not induce changes in the thickness of the aponeurosis plantaris pedis. Time-of-day influences the thickness of the aponeurosis plantaris pedis, but the changes are not larger than measurement uncertainty.

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