Evidence-Based Exercise Science

The Science
Behind Vasper

Over a decade of independent research across universities, military installations, hospitals, and elite sports programs — all pointing to the same conclusion: Vasper works.

14 Clinical Studies
3 Peer-Reviewed Publications
1,000+ Published BFR Studies Globally
30+ Years of BFR Science

The Platform

Three Proven Technologies.
One 21-Minute Session.

Vasper doesn't ask you to trust a single new idea. It combines three independently validated fields of exercise science into a single, systematically delivered protocol.

01
Blood Flow Restriction

Liquid-cooled compression cuffs on the arms and thighs partially restrict venous blood flow during exercise. This creates the metabolic environment of an intense workout at a fraction of the mechanical load — triggering growth hormone release, muscle hypertrophy, and hormonal optimization without joint stress.

30+ years of research · 1,000+ studies
02
High-Intensity Interval Training

A precisely programmed 21-minute interval protocol on a low-impact recumbent cross trainer. Research published in the Journal of Physiology confirms that HIIT produces superior cardiovascular and metabolic adaptations compared to continuous training — at a fraction of the time commitment.

Landmark research from Journal of Physiology
03
Active Body Cooling

Chilled water circulates through the cuffs, a cooling vest, and foot pedals throughout the session. Cooling delays core temperature rise, extends exercise tolerance, and — critically for neurological applications — supports cerebral function and promotes the neuroprotective lactate response studied in TBI recovery.

British Journal of Sports Medicine
BFR

Why This Combination Changes Everything

When blood flow restriction restricts venous outflow, lactate accumulates in the working muscles. The brain reads this as maximum exertion and responds with a surge in growth hormone, testosterone, and IGF-1. Cooling amplifies this response while protecting cerebral function. The result: your body produces the hormonal and physiological adaptations of an elite training session — from a 21-minute, low-impact workout accessible to anyone, regardless of age, injury, or fitness level.

Clinical Evidence

The Research

Independent studies conducted at leading institutions across the United States, Europe, and within the U.S. military. Click any card to access the full study.

Peer-Reviewed RCT Journal of Neurotrauma Military Relevant UMass Lowell & Emerson Hospital Cantu Concussion Center
Vasper Produces More Stable TBI Recovery Than Conventional Exercise Alone
25 adults with persistent post-concussive symptoms · Randomized controlled trial · 2021
The most rigorous study in the Vasper portfolio. Adults with unresolved concussion symptoms for up to one year were randomized to either standard aerobic exercise or the same exercise on the Vasper system. The Vasper group showed significantly less symptom fluctuation, more stable cognitive and sleep recovery, and better quality of life scores — all of which were maintained six weeks after treatment ended.
Key Results
  • Significantly less symptom severity fluctuation during treatment (p = 0.03)
  • More stable cognitive and mood recovery vs. control (p = 0.02 each)
  • Sleep and cognitive stability maintained 6 weeks post-treatment (p = 0.007 & 0.02)
  • 4× lower dropout rate — Vasper was markedly better tolerated
  • Quality of life improvement significantly greater at 6-week follow-up (p = 0.008)
Wu, Stark, Gravel, White, Avery, Enis, Cantu · 2021 Read Full Study
Veteran Study Colorado Springs Center for Human Performance
71% of Veterans Improved Sleep Quality. 100% of Those with Clinical Sleep Disorders Improved.
14 U.S. veterans · 24 sessions over 12 weeks · 2018
Veterans completed a 12-week Vasper program while being assessed with clinically validated measures for sleep, quality of life, and respiratory symptoms related to anxiety. The results were striking — particularly for the most impaired veterans, who responded best of all.
Key Results
  • 71% improved sleep quality (p = 0.02)
  • 100% of veterans with clinically disturbed sleep improved
  • Statistically significant gains in emotional wellbeing, energy, social function & general health
  • 57% improved overall quality of life across all 8 sub-categories (p = 0.03)
Marques, Higgins, Wernecke et al. · 2018 Read Full Study
Active Duty Military U.S. Air Force — 131st Pararescue Squadron
Vasper Outperformed Conventional Training for Elite Special Operations Operators
10 Pararescuemen (PJs) · 20 sessions over 6 weeks · 2017
The only Vasper study conducted directly on active-duty special operations personnel. Pararescue operators compared Vasper training against their conventional program. Vasper produced a more favorable anabolic hormone profile — more beneficial growth factors, less cortisol — with reduced physical recovery cost.
Key Results
  • More favorable anabolic hormone profile vs. conventional training
  • Elevated testosterone and IGF-1; reduced stress cortisol
  • Elite-level physiological benefit at reduced mechanical load
Vasper Systems · 2017 Read Full Study
Hormonal Health Vasper Systems
42% Increase in Anabolic Hormones. 69% Decrease in Stress Hormones.
10 males, ages 36–65 · 10–20 sessions · 2017
A hormone trial measuring IGF-1, testosterone, DHEAS, cortisol, and estradiol before and after a Vasper protocol. The results revealed a dramatic shift: the body moves into an anabolic, anti-stress hormonal state — the opposite of what chronic stress, aging, and overtraining typically produce.
Key Results
  • Anabolic growth hormones (IGF-1, testosterone, DHEAS) up 42% on average
  • Stress & inflammation hormones (cortisol, estradiol) down 69% on average
  • Individual IGF-1 gains ranged from +14% to +421%
Vasper Systems · 2017 Read Full Study
Peer-Reviewed Heart Hospital Baylor / Wise Regional
Safe Across All Ages and Fitness Levels — Formally Documented
20 subjects, ages 16–78 · Escalating pressure protocol · 2016
Published in the Journal of Exercise Physiology, this study systematically tested Vasper's cardiovascular safety across a wide age and fitness range using escalating cuff pressures. All subjects completed all sessions with no adverse events. Heart rate remained stable throughout. Blood pressure changes were within safe clinical ranges at all pressure levels.
Key Results
  • Zero adverse cardiovascular events across all 20 subjects and 7 sessions
  • Heart rate stable across all cuff pressures (0–85 mmHg)
  • Confirmed safe for use across ages 16 to 78
Gladden, Wernecke, Rector, Tecson, McCullough · 2016 · JEPonline Read Full Study
Peer-Reviewed Neurological Rehab University of California San Francisco
Parkinson's Patients Regained Gait Speed, Balance & Endurance in 5 Weeks
9 patients with mild-to-moderate Parkinson's · 10 sessions · 2014
Published in the International Journal of Physical Medicine & Rehabilitation, this UCSF quality assurance study found that Parkinson's patients achieved aerobic exercise goals on Vasper and made significant measurable gains in mobility and balance. 100% reported improved energy. 75% preferred Vasper over the AlterG anti-gravity treadmill.
Key Results
  • Gait speed improved 16.4% (p < 0.05)
  • 6-minute walk distance improved 7% (p < 0.05)
  • Balance performance improved 23–28% (p < 0.05)
  • 100% reported improved energy; no adverse events
Byl, Kretschmer et al. · 2014 · Int'l J. Physical Medicine & Rehab Read Full Study
Fall Prevention Kahala Nui Independent Living · Honolulu, HI
17.7% Improvement in Fall Risk — Nearly 3× Better Than Tai Chi
27 seniors, average age 82 · 12 sessions · 2013
In 30-minute sessions — half the length of conventional fall prevention programs — Vasper produced far greater improvements in leg strength and balance than Tai Chi, comprehensive exercise programs, or high-intensity strength training in published peer comparison. The effects held at 2–3 month follow-up.
Key Results
  • Berg Balance Score improved 17.7% vs. 4.9–6.8% for Tai Chi & conventional programs
  • Right leg strength in ideal range: 39% → 89% of participants
  • 70% with moderate-to-high fall risk improved to low risk
  • 90% compliance; 95% reported no discomfort
Vasper Systems · 2013 Read Full Study
Metabolic Health Covenant Medical · Lubbock, TX
8% Drop in Blood Sugar in 3 Months — Comparable to Pharmaceutical Intervention
16 Type II Diabetics · 3 sessions/week for 3 months · 2018
For patients who struggle to exercise intensively due to obesity, arthritis, or hypertension, Vasper's low-burden protocol produced clinically meaningful blood sugar improvements. An 8% reduction in HbA1c over 3 months is the same benchmark used to evaluate diabetes medications — achieved here through exercise alone.
Key Results
  • HbA1c decreased 8% on average (8.5 → 7.8 mg/dL, p = 0.002)
  • Average weight loss of 3.6 lbs (p = 0.032)
  • Achieved in patients with comorbidities preventing conventional exercise
Wernecke, Henderson · 2018 · ACSM Read Full Study
Neurological Rehab Emerson Hospital · Concord, MA
Multiple Sclerosis: Vasper Improved Endurance More Than Physical Therapy Alone
3 women with MS (EDSS 2.5–6.5) · Combined PT + Vasper protocol · 2018
MS patients frequently cannot exercise in heat due to symptom exacerbation (Uhthoff's phenomenon). Vasper's cooling component makes meaningful exercise possible. In this case series, Vasper outperformed PT alone for endurance improvement. One subject actually lost endurance during PT-only sessions but gained it with Vasper.
Key Results
  • Vasper stage outperformed PT stage for walking endurance improvement in all 3 subjects
  • Balance and fatigue impact improved in combination with PT
  • Tolerated across a wide range of MS severity (EDSS 2.5–6.5)
Chatiwala, Lammerding, Wernecke · 2018 Read Full Study
Regenerative Andrews Research & Education Foundation
A Single Vasper Session Mobilizes Stem Cells Into the Bloodstream
10 healthy males · Single session · Blood draws at 9 time points · 2018
Hematopoietic stem cells (HSCs) are the body's natural repair cells. This study found that Vasper consistently and significantly elevated CD34+ stem cells in peripheral circulation within 20 minutes of exercise — in every participant. This non-invasive stem cell mobilization may support musculoskeletal and vascular repair, particularly relevant for injury recovery.
Key Results
  • Significant increase in CD34+ stem cell marker (p = 0.028) within 20 minutes
  • Immune mobilization response confirmed in all 10 participants
  • Mobilized cells were viable and functional
Anz, Hansen, Warrell et al. · 2018 · ACSM Read Full Study
Vascular Health Jagiellonian University Medical College · Poland
One Session Triggers New Blood Vessel Growth and Improves Arterial Health
35 healthy volunteers · Single session · Vascular imaging + lab draws · 2017
Researchers at one of Poland's top medical universities found that a single Vasper session significantly elevated markers of angiogenesis — the formation of new blood vessels — and improved arterial stiffness. The response was strong enough to suggest therapeutic potential for peripheral artery disease and vascular insufficiency.
Key Results
  • VEGF (new blood vessel growth factor) significantly elevated (p = 0.000229)
  • CD31 and CD34 vascular markers both significantly increased (p < 0.0001)
  • Arterial stiffness improved after a single session
Schönborn, Trynkiewicz, Maga et al. · 2017 · Jagiellonian University Read Full Study
Elite Performance Professional Baseball (MLB)
22.5% Testosterone Increase in Elite Athletes — in Just 2 Weeks
5 professional baseball players · 8 sessions over 2 weeks · 2017
Even in elite athletes whose training is already optimized at the highest level, Vasper produced a measurable testosterone increase in just 8 sessions. This confirms that Vasper's hormonal effect is not limited to deficient or deconditioned individuals — it consistently elevates the hormonal environment regardless of baseline.
Key Results
  • Average testosterone increase of 22.5% across all 5 participants
  • All 5 players showed individual increases
  • Rapid response: measurable gains in just 2 weeks
Vasper Systems · 2017 Read Full Study
71%
of veterans improved sleep quality in 12 weeks
42%
average increase in anabolic growth hormones
17.7%
fall risk reduction vs. 6.8% for Tai Chi
8%
HbA1c reduction in Type 2 Diabetics in 3 months

The Foundation

Vasper Is Built on 30 Years of Established Science

Blood flow restriction training isn't new. Originally developed in Japan in the 1960s as "KAATSU" training, BFR has been the subject of more than 1,000 peer-reviewed studies published across sports medicine, physical therapy, cardiology, endocrinology, and neurology.

The finding is replicated consistently across independent research groups worldwide: BFR exercise at 10–30% of maximum effort produces muscle, hormonal, and cardiovascular adaptations comparable to training at 70–80% intensity — without the joint stress, injury risk, or recovery cost of heavy loading.

BFR has been formally adopted into U.S. Special Operations medical protocols, published in the Journal of Special Operations Medicine (Hylden et al., 2015) as a rehabilitation modality for extremity weakness. Vasper delivers this proven science with the added benefits of systematic cooling and computerized interval programming — more safely, more accessibly, and with measurable outcomes.

"BFR exercise at low intensity produces muscle hypertrophy and strength gains comparable to conventional high-intensity resistance training — enabling therapeutic benefit in populations who cannot tolerate heavy mechanical loads."
Loenneke & Pujol · Strength & Conditioning Journal, NSCA · 2009

Supporting Literature

Journal of Special Operations Medicine · 2015
Blood Flow Restriction Rehabilitation for Extremity Weakness: A Case Series
Hylden, Burns, Stinner & Owens
Published in the primary peer-reviewed journal of the SOCOM medical community. BFR is already formally embedded in Special Operations rehabilitation protocols — Vasper is its most complete clinical implementation.
Read Paper →
Journal of Physiology · 2012
Physiological Adaptations to Low-Volume HIIT in Health and Disease
Gibala et al.
Landmark review establishing that HIIT produces superior cardiovascular and metabolic adaptations at significantly lower exercise volumes than continuous training — validating the efficiency of Vasper's 21-minute protocol.
Read Paper →
Scientific Reports, Nature · 2016
L-Lactate Protects Neurons Against Excitotoxicity
Jourdain et al.
Establishes the neuroprotective mechanism linking BFR-induced lactate production to TBI recovery. BFR forces anaerobic metabolism, elevating lactate — which serves as both brain fuel and a protective signaling molecule. The mechanistic basis for Vasper's concussion recovery results.
Read Paper →
Exercise & Sport Sciences Reviews · 2009
Blood Flow Restricted Exercise and Skeletal Muscle Health
Manini & Clark
Foundational BFR review establishing the core mechanism: partial vascular occlusion drives muscle adaptation at low loads via metabolic stress, lactate accumulation, and growth hormone release — comparable to high-intensity training.
Read Paper →
British Journal of Sports Medicine · 2002
Methods, Advantages & Limitations of Body Cooling for Exercise Performance
Marino F.E.
Comprehensive review establishing the scientific basis for Vasper's cooling component: body cooling delays fatigue, reduces core temperature rise, extends exercise tolerance, and preserves cerebral function — directly relevant to neurological populations.
Read Paper →
Strength & Conditioning Journal (NSCA) · 2009
The Use of Occlusion Training to Produce Muscle Hypertrophy
Loenneke & Pujol
Demonstrates that BFR at just 10–20% of 1RM can produce clinically meaningful hypertrophy — enabling therapeutic benefit in populations who cannot tolerate the 70%+ loads required by conventional resistance training.
Read Paper →
View Full Resources Library →

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