The effect of 30 Hz vs. 50 Hz passive vibration and duration of vibration on skin blood flow in the arm
March 1st, 2008
California, United States
Colleen Maloney-Hinds, Jerrold Scott Petrofsky, Grenith Zimmerman
Prior research has suggested that whole body vibration significantly increases skin blood flow, and this study extends that research to investigate whether a specific frequency or duration is best at creating this effect. While no significant difference was found between frequencies, 50 Hz frequencies reached peak skin blood flow faster than 30 Hz frequencies.
Medical Science Monitor
Posted byMahmoud Said
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Abstract/Description
Background: Recently, researchers have demonstrated that Whole Body Vibration (WBV) results in significant increases in skin blood flow (SBF). No study has determined if a specific frequency or a specific duration is better at optimizing SBF.
Material/methods: Two studies were conducted to determine, 1) if there is a difference in SBF due to passive vibration of the forearm at 30 Hz vs. 50 Hz, 2) if one frequency is superior, and 3) if there is an optimal duration. In the first study, 18 subjects (mean age 20.3+/-2.9 years) were randomly placed into a 30 Hz or 50 Hz vibration group, and in the second, seven subjects (mean age 23.3+/-3.8 years) participated in both 30 and 50 Hz vibration. Each subject's arm was passively vibrated for 10 minutes. SBF was examined during vibration and for 15 minutes of recovery.
Results: Both frequencies produced significant increases in SBF (p
Material/methods: Two studies were conducted to determine, 1) if there is a difference in SBF due to passive vibration of the forearm at 30 Hz vs. 50 Hz, 2) if one frequency is superior, and 3) if there is an optimal duration. In the first study, 18 subjects (mean age 20.3+/-2.9 years) were randomly placed into a 30 Hz or 50 Hz vibration group, and in the second, seven subjects (mean age 23.3+/-3.8 years) participated in both 30 and 50 Hz vibration. Each subject's arm was passively vibrated for 10 minutes. SBF was examined during vibration and for 15 minutes of recovery.
Results: Both frequencies produced significant increases in SBF (p
