Vasper is a patented health and rehabilitation technology that uses compression and cooling in conjunction with low-intensity exercise to promote systemic health gains and recovery.

Vasper is performed on a low-impact recumbent elliptical with pressurized cuffs worn on the upper arms and legs. The cooling and compression non-invasively stimulates the natural production of anabolic hormones, which have wide-ranging health, rehabilitation and performance benefits.

How It Works

Vasper is based on three scientific principles – Cooling, Compression and Interval Training.



Specific muscle compression during exercise results in high concentration of lactic acid, creating the “muscle burn” of a much more intense workout. Once concentration of lactic acid reaches a high enough level, the fast twitch muscles signal the brain to trigger systemic recovery response. This leads to natural release of anabolic hormones such as Testosterone and Human Growth Hormone.


Active liquid cooling during exercise eliminates or minimizes sweating. It increases the blood oxygen levels resulting in enhanced performance. Preventing overheating reduces pain and inflammation, mitigates further physical stress and contributes to increased comfort during exercise.


Interval training is a scientifically proven method to efficiently improve strength, endurance and performance. Each 20 minute Vasper session consists of a warmup and a succession of sprint and rest intervals. The software protocols are fully customizable, designed for precise changes in pressure, resistance and intensity, allowing anyone to benefit regardless of age or physical ability.

Published Vasper Research

Gladden J, Wernecke C, Rector S, Tecson K, McCullough P.
Pilot Safety Study: The Use of Vasper, A Novel Blood Flow Restriction Exercise, In Healthy Adults.
J Exercise Phys. Vol 19:2 99-105. 2016 Apr.

Vasper Systems.
Vasper Training System to Improve Functional Balance and Decrease Fall Risk in Independent Living Seniors: A Quality Assurance Report.
Vasper. 2013.

Byl N, Byl NN, Kretschmer J, Irina F, Molli B, Maurice G.
Aerobic Exercise Enabled with Rehabilitation Technology Improves Mobility and Balance of Patients with Parkinson’s Disease: A Quality Assurance Report.
Int J Phys Med Rehabil. 2:5 1-14. 2014.


Vasper Data

ZRT Labs Vasper ParaRescue Hormonal Profiles

Science of Vasper


Literature and Resources

Loenneke JP and Pujol TJ.
The Use of Occlusion Training to Produce Muscle Hypertrophy.
Strength and Conditioning J. Vol 00:0. 2009.

Manini TM and Clark BC.
Blood Flow Restricted Exercise and Skeletal Muscle Health.
Exerc. Sport Sci. Rev. Vol. 37:2 78-85. 2009.

Cook CJ, Kilduff LP, Beaven CM.
Improving Strength and Power in Trained Athletes With 3 Weeks of Occlusion Training.
Int J Sports Phys and Performance. Vol 9 166-172. 2014.

Hylden C, Burns T, Stinner D, Owens J.
Blood Flow Restriction Rehabilitation for Extremity Weakness: A Case Series.
J Spec Op Med. Vol 15:1 48-54. 2015.

Kang DY, Kim HS, Lee KS, Kim YM.
The effects of bodyweight-based exercise with blood flow restriction on isokinetic knee muscular function and thigh circumference in college students.
J Phys Ther Sci. Vol 27: 2709-2712. 2015.

Jourdain P, Allaman I, Rothenfusser K, Fiumelli H, Marquet P, Magistretti PJ.
L-Lactate protects neurons against excitotoxicity: implication of an ATP-mediated signaling cascade.
Sci Reports. 6:21250 1-13. 2016 Feb.

Loenneke JP, Fahs CA, Wilson JM, Bemben MG.
Blood flow restriction: The metabolite/volume threshold theory.
Medical Hypotheses. 77 748-752. 2011.

Loenneke JP, Fahs CA, Rossow LM, Abe T, Bemben MG.
The anabolic benefits of venous blood flow restriction training may be induced by muscle cell swelling.
Med Hypotheses. 78 151-154. 2012.

Yasuda et al.
Effects of low-intensity, elastic band resistance exercise combined with blood flow restriction on muscle activation.
Scand J Med Sci Sports 2012.

Marino F E.
Methods, advantages, and limitations of body cooling for exercise performance.
Br J Sports Med. 36: 89-94. 2002.

Arngrimsson S, Petitt D, Stueck M, Jorgensen D, Cureton K.
Cooling vest worn during active warm-up improves 5-km run performance in the heat.
J Appl Physiol. 96: 1867-1874. 2004.

Gibalda M, Little J, MacDonald M, Hawley J.
Physiological adaptations to low-volume, high-intensity interval training in health and disease.
J Physiol 590:5 1077-1084. 2012.