Needs Devin, Blotter Jonathan, Cowan Madison, Fellingham Gilbert, Johnson A Wayne, Feland Jeffrey Brent
Mechanical Engineering Department, Brigham Young University, Provo, UT 84602, USA.
Statistics Department, Brigham Young University, Provo, UT 84602, USA.
J Clin Med. 2023 Mar 4;12(5):2047. doi: 10.3390/jcm12052047.
There is a broad scope of literature investigating whole-body vibration (WBV) effects on blood flow (BF). However, it is unclear how therapeutic localized vibrations alter BF. Low-frequency massage guns are advertised to enhance muscle recovery, which may be through BF changes; however, studies using these devices are lacking. Thus, the purpose of this study was to determine if popliteal artery BF increases from localized vibration to the calf. Twenty-six healthy, recreationally active university students (fourteen males, twelve females, mean age 22.3 years) participated. Each subject received eight therapeutic conditions randomized on different days with ultrasound blood flow measurements. The eight conditions combined either control, 30 Hz, 38 Hz, or 47 Hz for a duration of 5 or 10 min. BF measurements of mean blood velocity, arterial diameter, volume flow, and heart rate were measured. Using a cell means mixed model, we found that both control conditions resulted in decreased BF and that both 38 Hz and 47 Hz resulted in significant increases in volume flow and mean blood velocity, which remained elevated longer than the BF induced by 30 Hz. This study demonstrates localized vibrations at 38 Hz and 47 Hz significantly increase BF without affecting the heart rate and may support muscle recovery.
有大量文献研究全身振动（WBV）对血流（BF）的影响。然而，尚不清楚治疗性局部振动如何改变血流。低频按摩枪宣称可促进肌肉恢复，这可能是通过血流变化实现的；然而，使用这些设备的研究却很缺乏。因此，本研究的目的是确定腘动脉血流是否会因小腿局部振动而增加。26名健康、有运动习惯的大学生（14名男性，12名女性，平均年龄22.3岁）参与了研究。每位受试者在不同日期接受了8种治疗条件，并进行了超声血流测量。这8种条件分别为对照、30Hz、38Hz或47Hz，持续时间为5分钟或10分钟。测量了平均血流速度、动脉直径、容积流量和心率的血流参数。使用单元格均值混合模型，我们发现两种对照条件均导致血流减少，而38Hz和47Hz均导致容积流量和平均血流速度显著增加，且这种增加持续的时间比30Hz引起的血流增加持续的时间更长。本研究表明，38Hz和47Hz的局部振动可显著增加血流，而不影响心率，可能有助于肌肉恢复。
