Effects of Whole Body Vibration on Glycemic Indices and Peripheral Blood Flow in Type II Diabetic Patients|
Manimmanakorn, Nuttaset; Manimmanakorn, Apiwan; Phuttharak, Warinthorn & Hamlin, Michael J
Background: Whole body vibration (WBV) training is a regime of training on a vibration
platform that provides oscillatory movement to the body. Vibration training may be a potentially
useful therapeutic strategy to control diabetes and its complications. This study aimed to evaluate
the effect of WBV on glycemic indices and peripheral blood flow in type II diabetic patients.
Methods: A parallel group clinical trial was conducted with 1:1 allocation ratio at Khon
Kaen University between February and May 2010. The study included diabetic patients receiving
diet or oral medication control over the previous year and excluded patients with serious medical
and musculoskeletal disorders. Forty type II diabetic patients [14 males, 26 females, 63.2 (7.7) y,
mean (SD)] were randomised into two groups (WBV and control) by computer software using a
block of four design. The WBV group was given two sets of six one-minute vibration squats, three
times per week for twelve weeks. The control group maintained their normal physical activity
levels. The primary outcome was the patients glycemic indices.
Results: We found no significant difference in glycosylated haemoglobin (HbA1c), fasting
blood sugar, insulin level and insulin sensitivity between WBV and control groups. Compared to
the control group, WBV training resulted in a substantial reduction in resting diastolic blood
pressure -7.1 mmHg (95% CI: -10.9, -3.3, P = 0.001) and peak systolic velocity -7.3 cm.sec-1 (95% CI:
-14.7, -0.03, P = 0.049), but made little difference to resting heart rate, systolic blood pressure, end
diastolic velocity, and popliteal artery diameter.
Conclusion: Whole body vibration improved resting diastolic blood pressure and peak
systolic velocity, however, any beneficial effect of WBV on glycemic indices remains unclear.
vibration; diabetes mellitus; blood circulation; blood pressure; clinical trial