Strength training and insulin sensitivity

Insulin sensitivity indicates a general state of health and when disturbed, it indicates serious health problems (eg metabolic syndrome). 

The researchers compared 

Body composition was measured by BIA, after the night (post) the glucose tolerance test was performed and the minimum model was used for calculations. You can read more on this subject in Joanna’s work
Revisions System of comprehensive support for the treatment of diabetes and metabolic diseases. 


Researchers made a fundamental mistake by using the BIA method. Therefore, it turned out that obese people have a similar amount of dry body mass (including muscles) as exercising. This is a known distortion resulting from poor technology. For example, in the Boneva-Asiova I study, a TBF-215 machine was compared (Tanita, Tokyo, Japan) – BIA technology with DXA measurement (Hologic QDR 4500 machine). Apparently the measurements did not differ significantly, but … in the skimmed people BIA method underestimated the amount of adipose tissue (in terms of% and kilograms), and in turn overstated the amount of lean body mass. With the increase in BMI, the spread between DEXA and BIA became more and more visible. In the next study, the BIA method inflated the amount of dry body weight by 13.2% (ladies had 38.72 ± 4.2 kg in real terms, BIA 43.85 ± 3.2 kg). What’s worse In fact, on average, ladies wore 18.5 kg of fat, the BIA method showed only a resolution of ± 4.5 kg. 


Besides, the researchers did not add that the key is not the amount of fat, but its type. The most important thing is that the amount of fat in the torso is as low as possible, the subcutaneous tissue located on the thighs or buttocks does not have such a negative metabolic effect. 



Trainers should strive to achieve the lowest possible body fat value (9-10% fatness is desirable). 


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