Validating the Suji's Algorithm: How Accurate Is It?

Clinically Validated, Expert Trusted: Suji’s Smart Compression Algorithm
Suji’s automated compression calibration was independently validated against ultrasound, the clinical gold standard for blood flow restriction (BFR). Tested on both upper and lower limbs, our algorithm showed high correlation with ultrasound-derived pressures—delivering safe, effective, and consistent results with minimal error. Built on decades of research, Suji matches the precision of surgical-grade devices while eliminating the need for clinical equipment. Train smarter with confidence knowing Suji is backed by science, designed for safety, and engineered for real results.

Validating the Suji's Algorithm: How Accurate Is It?

In blood flow restriction (BFR) training, accuracy is everything — especially when determining the right level of compression. That’s why at Suji, we rigorously tested our automated personalized restrictive pressure algorithm against the clinical gold standard: ultrasound-derived total arterial occlusion pressure (TAOP). Built upon research originating as far back as the early 80's our innovative approach is ground in decades of validation and improves with every calibration completed.

Here’s what we found — and what it means for your safety, performance, and confidence when using Suji.

Note: this validation study was conducted independently by researchers at the University of Central Florida. 

What We Tested

We evaluated the Suji algorithm on 50 recreationally active adults, measuring TAOP in both the upper and lower limbs. Each individual’s arterial occlusion pressure was assessed using:

  1. Ultrasound – the gold standard in vascular measurement

  2. Suji’s automated algorithm – designed for practical, repeatable use without the need for clinical equipment

Upper Limb Results

  1. Ultrasound-derived TAOP: 117–169 mmHg

  2. Algorithm-derived TAOP: 105–159 mmHg

  3. Mean difference: -11.2 mmHg (algorithm slightly underestimates - better than overestimating with regards to safety)

  4. Correlation: R = 0.711 (statistically significant, p<0.001)

Although the algorithm slightly underestimated TAOP on average, the measurements were strongly correlated with ultrasound. There was no significant relationship between bias and pressure level, indicating consistent performance across a range of users.

Lower Limb Results

  1. Ultrasound-derived TAOP: 138–220 mmHg

  2. Algorithm-derived TAOP: 138–218 mmHg

  3. Mean difference: -4.3 mmHg

  4. Correlation: R = 0.636 (statistically significant, p<0.001)

In the lower limbs, the algorithm again tracked closely with ultrasound, with only a small average underestimation.

What This Means for You

Suji’s validation shows that our automated personalised restrictive pressure algorithm provides clinically relevant accuracy, with high correlation to ultrasound — all without the need for specialist equipment.

Note: Suji's automated calibration algorithm meets the same accuracy requirements as automated surgical room tourniquets. 

✔️ Safe and effective pressure estimation

✔️ Consistent across both upper and lower limbs

✔️ Minimal error

✔️ One-time calibration, stored to your profile for reliable use every session

For users and clinicians alike, this means peace of mind — knowing your BFR sessions are informed by data, not guesswork.

Final Thoughts

Suji was built on the belief that the power of BFR should be accessible — but never at the expense of safety or accuracy. This validation study confirms that our algorithm provides a trusted, reproducible alternative to ultrasound, engineered to clinical standards and ready for everyday use.

When you use Suji, you're not just training smarter. You're training with clinically validated precision.