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
from September 2014
©Journal of Sports Science and Medicine (2008) 07, 286 - 291

Research article
Intramuscular Temperature Differences Between the Mid-Point and Peripheral Effective Radiating Area With Ultrasound
Michale G. Miller , Janae R. Longoria, Christopher C. Cheatham, Robert J. Baker, Timothy J. Michael
Author Information
Department of HPER, Western Michigan University, Kalamazoo, MI, USA

Michale G. Miller
✉ Associate Professor, Western Michigan University, Dept of HPER, 1903 W Michigan Ave, Kalamazoo, MI 49008-5426, USA
Publish Date
Received: 01-04-2008
Accepted: 24-04-2008
Published (online): 01-06-2008
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The purpose of the study was to determine whether uniform intramuscular heating is achieved throughout a treatment area 2 times the transducer head at both 1 and 3 MHz. Seven male and three female subjects (Age: 23.6 ± 1.0 yrs, Weight: 83.8 ± 23.2 kg, Site Skinfold: 13.9 ± 7.3 mm) underwent two ultrasound treatments (1 and 3 MHz) in the triceps surae muscle group. Thermocouples were inserted at the midpoint and periphery of the treatment area. Ten minute baseline temperatures were recorded followed by a ten minute ultrasound treatment. Two (site) X 10 (time) repeated measures ANOVAs were separately used to determine significance for 1 and 3 MHz treatments. Post-hoc testing was performed using the Bonferroni adjustment. A significant site-by-time interaction was observed for both the 1 and 3 MHz treatments. From baseline to the end of the treatment, temperature increased approximately 2.62°C and 1.58°C for the midpoint and periphery of the 1 MHz treatment and 5.88°C and 3.64°C for the 3 MHz treatment. The differences in temperature suggest that uniform heating does not occur throughout the treatment area.

Key words: Tissue, thermal effects, acoustical.

           Key Points
  • 3 MHz is more effective in raising intramuscular temperature within ERA.
  • Stroke count/rate of transducer may play a factor in heating tissue.
  • Treatment size may alter uniform heating.
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