Treatment order was balanced via Latin square and performed 24 hr apart.
Main Outcome Measures:
Peak intramuscular temperatures.
The only significant difference detected was that the mean temperature after the 1.0-W/cm2 treatment (37.3 °C) was greater than that at 2.0-W/cm2 intensity (36.1 °C). No treatment reached the desired 4° increase needed for therapeutic efficacy.
Treatments at 1.0 W/cm2 increased tissue temperatures more than those at 2.0 W/cm2.