title: Muscle heating with Megapulse II shortwave diathermy and ReBound diathermy.
abstract: BACKGROUND
  A new continuous diathermy called ReBound recently has been introduced. Its effectiveness as a heating modality is unknown.
  
  
  OBJECTIVE
  To compare the effects of the ReBound diathermy with an established deep-heating diathermy, the Megapulse II pulsed shortwave diathermy, on tissue temperature in the human triceps surae muscle.
  
  
  METHODS
  Crossover study.
  
  
  METHODS
  University research laboratory.
  
  
  METHODS
  Participants included 12 healthy, college-aged volunteers (4 men, 8 women; age = 22.2 ± 2.25 years, calf subcutaneous fat thickness = 7.2 ± 1.9 mm).
  
  
  METHODS
  Each modality treatment was applied to the triceps surae muscle group of each participant for 30 minutes. After 30 minutes, we removed the modality and recorded temperature decay for 20 minutes.
  
  
  METHODS
  We horizontally inserted an implantable thermocouple into the medial triceps surae muscle to measure intramuscular tissue temperature at 3 cm deep. We measured temperature every 5 minutes during the 30-minute treatment and each minute during the 20-minute temperature decay.
  
  
  RESULTS
  Tissue temperature at a depth of 3 cm increased more with Megapulse II than with ReBound diathermy over the course of the treatment (F₆,₆₆ = 10.78, P < .001). ReBound diathermy did not produce as much intramuscular heating, leading to a slower heat dissipation rate than the Megapulse II (F₂₀,₂₂₀ = 28.84, P < .001).
  
  
  CONCLUSIONS
  During a 30-minute treatment, the Megapulse II was more effective than ReBound diathermy at increasing deep, intramuscular tissue temperature of the triceps surae muscle group.
authors.affiliation: Human Performance Research Laboratory, Brigham Young University, Provo, UT, USA.
authors.forename: David O
authors.initials: DO
authors.lastname: Draper
authors.forename: Amanda R
authors.initials: AR
authors.lastname: Hawkes
authors.forename: A Wayne
authors.initials: AW
authors.lastname: Johnson
authors.forename: Mike T
authors.initials: MT
authors.lastname: Diede
authors.forename: Justin H
authors.initials: JH
authors.lastname: Rigby
mesh_terms: D000328:Adult; D001831:Body Temperature / Q000502:physiology*; D018592:Cross-Over Studies; D003972:Diathermy / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology*; D013821:Thermometers; D013997:Time Factors; D055815:Young Adult