💥This time around the Arm Cuff has been improved on about all relevant parameters, especially attachment is now faster and more convenient than ever.

💥 Full width is 7 cm (2.7 inch) which is the same as the original Arm Cuff.

💥 Fits about 99% of all arm sizes, specified as upper arm circumference between 20-50 cm (7.9-20 Inch).

💥 Works perfectly in conjunction with the Bluetooth Device for assessment of Limb Occlusion Pressure (LOP) and the “Calculate Pressure” module at training.fitcuffs.com.

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The Science Behind the Fit Cuffs Pressure Calculator V2

Does auto adjusted blood flow restriction (BFR) training improve muscle growth and strength compared to fixed-pressure cuffs? In this first 8-week within-subject study using the Fit Cuffs BFR system, researchers found no meaningful differences in hypertrophy, strength gains, or perceived discomfort between autor and non-auto conditions. When pressure was prescribed relative to limb occlusion pressure (LOP) and training variables were standardized, both approaches produced significant improvements. Here’s what coaches, clinicians, and lifters need to know about auto vs fixed-pressure BFR.

February 24, 2026

Figures 2 and 3 display grouped scatter plots comparing autoregulated (AUTO, gray circles) and non-autoregulated (NONAUTO, red triangles) blood flow restriction training before (Pre) and after (Post) an 8-week intervention. Figure 2 shows significant increases in rectus femoris and vastus lateralis muscle thickness at 30%, 50%, and 70% femur length in both conditions, with no differences between groups. Figure 3 shows significant increases in rectus femoris cross-sectional area (50% and 70%) and 1RM strength for single-leg squat and knee extension in both conditions, again with no between-group differences. Asterisks (***) indicate statistically significant pre-to-post improvements.

February 24, 2026

Automatic Pressure adjustments during Blood Flow Restricted (BFR) Exercise – A randomized within-subject 8-week trial

Does auto adjusted blood flow restriction (BFR) training improve muscle growth and strength compared to fixed-pressure cuffs? In this first 8-week within-subject study using the Fit Cuffs BFR system, researchers found no meaningful differences in hypertrophy, strength gains, or perceived discomfort between autor and non-auto conditions. When pressure was prescribed relative to limb occlusion pressure (LOP) and training variables were standardized, both approaches produced significant improvements. Here’s what coaches, clinicians, and lifters need to know about auto vs fixed-pressure BFR.

December 12, 2025

Top page of the Fit Cuffs BFR Unit v1.1 gift box, highlighting key features of the blood flow restriction training system and core functionality of the updated Unit

December 12, 2025