German University of Sports Randomized Double-Blind Study

German University of Sports Randomized Double-Blind Study

Who performed the study?

The German University of Sports Cologne performed this study. This university is Germany’s only, and Europe’s largest, university in the field of sport and exercise science.

How was the study performed?

In this double blind study, blood from test participants was tested in 12 independent samples to determine oxygen levels both before and after Powerinsole was used. Additionally, heart rate variability was calculated before using Powerinsole, as well as 30 and 60 minutes after using Powerinsole, as a marker of regeneration after exercise.

This paper represents one of the first comprehensive studies on the effectiveness of Powerinsole® conducted according to scientific standards. The focus of the research was not the performance per se, but rather possible physiological action mechanisms of the insole. Due to a lack of well-founded literature on possible mechanisms of Powerinsole technology on the physiology of movement, the aim of this work was to shed light on various aspects on which the sole is likely to have an influence.

Within the scope of a randomized double-blind study at the German University of Sports in Cologne, Institute for Circulation Research and Sports Medicine, Department of Molecular and Cellular Sports Medicine, the physiological effects (including reduced physiological stress and improved regeneration ability) under physical stress and regeneration were investigated in order to derive the next steps for the further development of our products.

What are the results of the study?


As shown in the image above, a positive curve in 6 out of 11 test persons indicates a higher oxygen saturation in the blood after using Powerinsole for a short period of time. 


For Acute Stress: 

Also tested in the blood during this process was the deformability of the red blood cells. This is interpreted by the means of the maximum deformability (Elongation Index max (EImax)) and the pressure required to deform the red blood cells to half of EImax (SS 1/2). Higher values for Emma and lower values for SS 1/2 mean an improved deformability of the red blood cells. A better deformability would mean, among other things, a better supply of oxygen to the musculature. With Powerinsole a statistical significance of the maximum deformability was achieved!




Regeneration parameter:

As shown in the images above, heart rate variability was determined by means of an orthostatic test. This test was carried out before exposure to Powerinsole as well as 24h and 48h after wearing Powerinsole. The variables RMSSD, Low Frequency %, high frequency %, and High frequency/low frequency ratio were used for the evaluation.

The study revealed a significant difference in Low frequency regeneration between placebo and Powerinsole. The study revealed a significant difference in LF regeneration between placebo and sole (p ≤ 0.05). A similar trend was also observed in the other HRV indicators. It can be said with relatively high certainty that the sole seems to have an acute effect on heart rate variability!

The results as a whole indicate that Powerinsole® is very likely to have an acute influence on physiological processes to maintain physical performance (lactate, oxygen saturation, nitrite, erythrocyte deformability and heart rate variability).