I don't understand what the problem is: The data in the double-blind study clearly shows no statistically significant effects (just look at N and the standard deviation bars) and the company doesn't claim that there would be such effects.
The company only says there is a "positive trend" which there indeed is.
Doesn't matter if the SD bars make it obvious. No layman can read such a chart. The text 110% makes it sound like the study PROVES without any doubt that the product had an effect.
"the lactate measurement shows a difference"
"The lower lactate value with Powerinsole means longer performance and a later onset of muscle fatigue."
and finally
"Even with the first application of the power insole, a lower skin conductance is evident compared to the placebo. This means that the power insole can help reduce stress levels."
Nowhere are they talking about statistical significance.
The company only says there is a "positive trend" which there indeed is.