How to Use Fit Cuffs

How to Use Fit Cuffs

Access Fit Cuffs Training App

Considerations Before Attachment <strong>⇩</strong>
  1. Before using Fit Cuffs, please consider any relevant safety concerns at BFR & Safety Concerns. ⇩
  2. Obtain an appropriate and individualized pressure (mmHg) by the “Calculate Pressure” module at OR set the pressure as a percentage (40-80%) relative to Limb Occlusion Pressure/Arterial Occlusion Pressure (LOP/AOP) ⇩

2A Calculate Pressure – Set the pressure (mmHg) by the Calculate Pressure module at
To use the module, you must measure the corresponding circumference of your upper arm or upper thigh, and please remember to do the measurement in a relaxed resting state. To obtain a personalized pressure recommendation (mmHg) for Your training see the Fit Cuffs Training App and navigate to the “Calculate Pressure” module. The pressure recommendation algorithm predicts Arterial Occlusion Pressure (AOP) and displays the recommended pressure for BFR Training. For optimal effect of Your training, update the pressure as often as possible, as we advise to slighly increase the pressure if You use Fit Cuffs regularly.

The Calculate Pressure module is a convenient and valid alternative to LOP – See Web App Explained for additional information concerning the Calculate Pressure module.

2B Limb Occlusion Pressure (LOP) – Set the Pressure (mmHg) relative to LOP via the LOP Device or handheld doppler. In clinical practice or for individuals with relative contraindications, it can be advised to set the pressure relative to LOP. Please see Limb Occlusion Pressure (LOP) for more information and the practical guide for the LOP / Bluetooth Device. You will receive information concerning the 3. party App for the LOP / Bluetooth Device via email if applicable for Your order.

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For the Complete & Performance models remember to distinguish left vs right version of the cuffs

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General Instructions For Attachment Pressure Calibration & Deflation Of The Cuffs <strong><strong>⇩</strong></strong>
  1. Ensure the cuffs are completely empty (deflated) – if your product includes the Deflation Plugs, remember to use these before unwrapping the velcro. Attach the cuffs then connect the pressure gauge. Turn the valve anticlockwise ↶ to deflate the cuffs. Please remember to deflate the cuffs after every training session to attain a proper fit for the following session. (Check the videos below for how to deflate the different cuffs) ⇩
  2. Attachment of the cuffs – Slide the cuff through the nylon loop and make sure the female connector is facing downwards. Only relevant for the Complete & Performance models: For fast and convenient attachments, be aware of “left” & “right” versions of your cuffs. Please check the videos here on this page to distinguish left & right versions. ⇩
  3. Tension of the cuff – Make sure to have a semi-snug fit, as 2-3 fingers must easily pass underneath the cuff. Loose-fitting cuffs will require higher pressure to restrict blood flow and may slide during exercise. A tight-fitting cuff will inhibit muscle contractions and result in excessive pressure fluctuations during muscle contractions. Though, for the Leg Cuffs V3.1, it is advised to attach the cuffs as tight as possible. ⇩
  4. Inflation – Close the valve on the Fit Manometer (pressure gauge) by turning it clockwise ↷ and attach the male connector to the female connector on the cuff. You will hear a distinct “click” when the Fit Manometer has been connected successfully. ⇩
  5. Pressure Calibration – For proper fitting cuffs and to evade pressure variance between sets remember to “calibrate” the pressure. Contract/flex the corresponding muscles several times while the pressure gauge is still attached. The intended pressure should be measured after this calibration phase and importantly always read the dial (mmHg) in a complete resting state, by placing the weight on the opposite leg or resting the corresponding arm, respectively.
  6. Pressure Deflation – After exercising but before you detach the cuffs, remember to deflate all the corresponding cuffs completely to attain a proper fit for the following training session. If you attach a cuff that has not been properly deflated the set-absolute pressure will be less restrictive i.e., less % of LOP being applied. If your product includes the new Deflation Plugs remember to connect these to the corresponding cuffs before wrapping the velcro.

Remember to deflate the cuffs completely after each session to attain a proper fit for consecutive use

Use this technique to manually deflate the Arm Cuffs V3.1

To avoid pressure drops during exercise always calibrate the intended pressure before training

FitCuffs - easy-to-use deflation plugs for swift deflation of the cuffs

Remember to utilize the Deflation Plugs To make sure the Cuffs is always Completely Deflated

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Troubleshooting – Pressure Drop And / Or Poor Fitting Cuffs <strong><strong>⇩</strong></strong>

If You’re struggling with pressure leaks (⤵ mmHg) during exercise, please consider the various reasons for this issue and not an actual “air-leak”:

  1. Contract the relevant muscles several times while the Fit Manometer is still attached and remember to repeat this procedure accordingly. It might take about 1-2 minutes to get the pressure stable before exercising. ⇩
  2. Please also consider, that even though the calibration phase has been done accordingly, You might experience a pressure drop if the cuff moves during exercise. In most cases, this can be attenuated if You remember to completely deflate the cuffs before attachment to attain a proper fit. ⇩
  3. If the initial pressure calibration has been implemented accordingly but pressure drops during exercise, reassess the pressure during training immediately after the first set or interval.

When initiating inflation of the cuff the vasculature underneath the cuff will be forced downstream. This effect will only exacerbate when contracting the corresponding muscles reducing the circumference of the limb and thereby a drop in pressure.
The nylon material is semi-elastic and the initial slack of the velcro attachment will lengthen during the first muscle contractions. So, the overall circumference of the cuff will expand initially creating a pressure drop because of this small but significant elongation.

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Sufficient calibration is simply imperative to attenuate pressure drops during exercise

Check Below For How To Attach The Different Cuffs Accordingly

How much pressure (mmHg)? The Pressure-Load Continuum in Blood Flow Restriction Training ⬇


The time and less-load benefit of doing BFR are relative to the amount of relative pressure, being that higher pressure 70-90% of Limb Occlusion Pressure (LOP) seems to be favorable when tolerated.

This is particularly relevant when using very low-load (<25% 1RM), as there seems to be a threshold of at least 60% LOP when using very low load.

It seems that relative load and relative pressure exist on a mutually affected continuum. When using moderate-loads (40-50% of 1RM) use less pressure (40-60% LOP). On the other hand, when utilizing very low-load (<25% of 1 RM) It is strongly recommended to use higher relative pressures (70-90% LOP).

The load-pressure continuum appears to be a very important consideration especially post-operation or on other occasions with prescribed load restrictions. Conversely, for BFR application in a gym setting without any strict load restriction, it is probably favorable to utilize less pressure (40-60% LOP) but the higher relative load (30-50% 1 RM). This phenomenon is illustrated below.

Cerqueira et al. (2021) Repetition Failure Occurs Earlier During Low-Load Resistance Exercise With High But Not Low Blood Flow Restriction Pressures: A Systematic Review and Meta-analysis

Pignanelli et al (2019) Low-load resistance training to task failure with and without blood flow restriction- Muscular functional and structural adaptations


If you would like the PDF manual for Fit Cuffs® Training System please send this request at For different Training Protocols see How When & Why BFR & The Complete BFR Guide

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