Web App – Explained

We have just released (April 2020) the brand-new progressive web app “Fit Cuffs Training”, which can be assessed online and offline by downloading to your phone just as standard app from google or app store.

Check the video on how to register a user and how to download if you want offline availability, just scroll to 49 s. to see how you can access the app from your homescreen.

We have developed and updated the algorithm from the comprehensive science and data in the predictors of Limb Occlusion Pressure (LOP), for You to enjoy Effective, Save and Convenient BFR Training.

We do not recommend to use arbitrary pressures, neither do we recommend a default pressure, though 80 mmHg and 100 mmHg for the upper and lower body, respectively, would be applicable for about 90% of all people.

Our goal pressure extracted from the algorithm is 40-70% LOP and 50-80% LOP, for the upper and lower body, respectively. Currently, the “Fit Cuffs Training” algorithm can predict this goal pressure for >95% of all people.

From the comprehensive data, it seems that limb circumference can explain about 50-70% of the variance in LOP. But the width of the cuff is actually the most important factor to consider, that is also why “Fit Cuffs Training” is only applicable for Fit Cuffs®.

Thigh circumference is undoubtedly the biggest anthropometric predictor of arterial occlusion in the lower body but it also seems that of factors is of importance:

From the large amount of data, it seems that both gender, age and body composition influence the percentage of blood flow that is restricted. That is why these predictors has also been included in the algorithm, along with training condition, as we find this of importance for Ratings of Perceived Exertion (RPE) for BFR Training.

So, when LOP is not assessible, we recommend that limb circumference, age, gender, body compositions, and training condition are accounted for when prescribing the restriction pressure for BFR.

Every time You tab-in LOP and calculate a corresponding pressure for either upper or lower body, You actually help us to improve the algorithm as we get more data.

“In addition, we have outlined models which indicate that restrictive cuff pressures should be largely based on thigh circumference and not on pressures previously used in the literature.” (Loenneke et al. 2012).
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Source:

Tuncali et al. (2006) A New Method for Estimating Arterial Occlusion Pressure in Optimizing Pneumatic Tourniquet Inflation Pressure.
Tuncali et al. (2018) Tourniquet pressure settings based on limb occlusion pressure determination or arterial occlusion pressure estimation in total knee arthroplasty.
Loenneke et al. (2012) Effects of cuff width on arterial occlusion implications for blood flow restricted exercise.
Loenneke et al. (2014) Blood flow restriction in the upper and lower limbs is predicted by limb circumference and systolic blood pressure.
Brown et al. (2018) Factors affecting occlusion pressure and ischemic preconditioning.
Hunt et al. (2016) The influence of participants characteristics on the relationship between cuff pressure.
Jessee et al (2016) The Influence of Cuff Width, Sex, and Race on Arterial Occlusion Implications for Blood Flow Restriction Research.
Jobbágy & Varga (2014) Digitális Tankönyvtár. Biomedical Instrumentation. Indirect blood pressure measurement methods.
Karabulut (2011) The effects of different initial restrictive pressures used to reduce blood flow and thigh composition on tissue oxygenation of the quadriceps.