Vasper.
Liquid cooled cuffs restrict venous return from your arms and legs while you pedal. Metabolites build faster than they clear, and your body responds to that signal rather than to how much weight you moved.
- Low impact. The load is metabolic rather than mechanical
- Cooling runs throughout, so you finish without overheating
- Around twenty minutes, seated on a recumbent trainer
- The device itself has been studied by name in peer reviewed work
Signal without the load.
Conventional training creates a metabolic signal by moving enough weight, or moving for long enough, that your muscles run short of oxygen and metabolites accumulate. That works, but it costs joint load, time, and recovery.
Vasper produces a similar metabolic environment differently. Cuffs on your arms and thighs restrict venous return while you pedal a recumbent trainer at modest effort. Metabolites accumulate locally because they cannot clear as quickly, and the chilled water running through those same cuffs keeps you from overheating while it happens.
Cooled compression cuffs · recumbent trainer
Restrict, accumulate, respond.
Three components run at once and the combination is the point. Any one of them alone produces something different from what happens when all three are present.
Compression Restricts
Cuffs on the arms and thighs apply pressure sufficient to restrict venous flow out of the working muscle while allowing arterial flow in. Published work using this system reports around 40 mmHg at the arms and 65 mmHg at the legs.
- Restricts venous return, not arterial supply
- Wider cuffs require lower pressure for the same effect
- Pressure and temperature monitored continuously
Metabolites Accumulate
With clearance slowed, metabolic by products build in the working muscle faster than modest effort alone would produce. The literature on blood flow restriction training treats this accumulation as the stimulus rather than mechanical tension.
- Metabolic stimulus rather than mechanical load
- Achieved at intensities that spare the joints
- The basis of a large body of BFR research
Cooling Runs Alongside
The same cuffs carry chilled water, reported at around 5.6 degrees Celsius in published protocols, alongside a cooled seat pad and pedals. This limits the rise in core temperature that normally accompanies intense effort.
- Cooling delivered through the cuffs themselves
- Cooled seat pad and foot pedals
- Most people finish without significant sweating
The Body Responds
A 2025 study measured what actually happens. With the system engaged, total ventilation and ventilatory equivalents for oxygen and carbon dioxide were significantly higher than the identical session without compression and cooling, and remained elevated afterwards.
- Ventilation significantly higher with the system on
- Elevation persisted into the post exercise period
- Measured directly rather than inferred
What is established.
Unusually for a proprietary device, this one has been studied by name in peer reviewed journals, which lets us be more specific than we can be elsewhere.
Blood flow restriction training is well established
The underlying principle has a substantial research base. Moderate restriction, at roughly half the pressure typically used in older protocols, has been reported to produce strength adaptations comparable to high intensity training without restriction, while causing less discomfort.
The device has been safety tested
A pilot safety study published in the Journal of Exercise Physiology Online examined cuff pressures from 40 to 85 mmHg against a no pressure control, and concluded the protocol with concomitant cooling was safe across a cross section of regular exercisers.
The demand it creates has been measured
A 2025 study in Methods and Protocols measured oxygen consumption, carbon dioxide production, ventilation, and perceived exertion during identical interval sessions with and without the system engaged. With it on, ventilation and ventilatory equivalents were significantly higher during and after exercise.
Who tends to use it.
The low impact profile makes this suitable for people conventional training does not serve well.
People with genuinely limited time who need a short session to do real work
Anyone whose joints do not tolerate heavy load or repeated impact
Athletes wanting stimulus without adding mechanical load to a heavy training week
Members returning to training after a period away or after clearance
Executives who cannot arrive at a meeting having sweated through a workout
Screening applies for cardiovascular conditions, clotting disorders, and pregnancy
What to expect.
Short, seated, and harder than it looks from the outside.
Preparation
- Wear shorts and a t-shirt. The cuffs go on arms and thighs
- Tell our team about any cardiovascular or clotting condition
- Hydrate beforehand, though you will sweat far less than usual
- No need to schedule a shower afterwards for most people
The Session
- You sit on a recumbent trainer with cuffs fitted and cooling running
- Intervals of effort alternating with recovery, guided throughout
- Around twenty one minutes from start to finish
- The effort is real. The cooling changes how it feels, not whether it is work
Afterwards
- Cuffs come off and normal circulation returns immediately
- Most people leave without needing to change or shower
- Legs may feel worked despite the low mechanical load
- Typically prescribed two to three times a week
Around twenty one minutes · guided intervals throughout
Framed as mechanisms, not promises.
Each item describes what this modality is studied in relation to. None is a guaranteed outcome, and individual response varies.
Restriction of venous return producing local metabolite accumulation
A metabolic stimulus achieved at intensities that spare the joints
Significantly elevated ventilation compared with the same session unassisted
Elevated ventilatory equivalents persisting into the post exercise period
Cooling that limits the core temperature rise normally accompanying effort
Studied for muscle metabolism and oxidative stress parameters
Safety examined across cuff pressures from 40 to 85 mmHg
Built on a blood flow restriction literature spanning decades
Alongside training, not instead of it.
Vasper is a genuine training stimulus, which means it needs placing in your week rather than adding on top of everything else.
We measure where you are
VO₂ Max and InBody establish your baseline, and screening confirms whether compression training is appropriate for you before anything is scheduled.
We place it deliberately
Because it is a real stimulus rather than a passive session, it is scheduled around your other training rather than stacked onto it. Typically two to three times a week.
We retest
Your markers are measured again at a defined point. What continues or changes is decided on data rather than on how a session felt.
Studied by name.
Most devices in this category have no research of their own. This one has been examined in peer reviewed journals, which is worth something.
Chilled water is pumped to cuffs exerting compression on the arms at 40 mmHg and the legs at 65 mmHg, primarily restricting venous blood flow from the exercised muscles while keeping the body cool during exercise.
Short-term effects of blood flow restriction and body cooling
Acute metabolic and respiratory responses
Interval training with occlusion and cooling
Pilot safety study
Genuine device research, at a realistic scale
Having peer reviewed studies naming the actual device puts this ahead of most equipment in this category. Two things worth carrying as you read. These are small studies, in the range of twenty six to thirty participants, which is normal for exercise physiology but limits how far conclusions generalise. And the safety study is hosted by the manufacturer, so read it as you would any industry associated work. What the research does establish clearly is that the system measurably increases physiological demand from the same session. Claims beyond that we will leave to others.
Questions answered.
Is this really equal to two hours of exercise?
We will not make that claim. It circulates widely and it is not what the research shows. What the studies do show is that the system significantly increases ventilation and metabolic demand compared with the identical session without it. That is meaningful and it is measurable. It is not the same as equivalence to two hours of running.
Does the compression hurt?
It should feel firm rather than painful. The pressures used are moderate by blood flow restriction standards, and research notes moderate pressures produce comparable adaptations with less discomfort than older higher pressure protocols. Tell our team if anything feels wrong and we will adjust.
Will I sweat?
Far less than you would expect for the effort involved. The cooling is delivered through the cuffs, seat pad, and pedals specifically to limit core temperature rise. Most people leave without needing to change.
Is blood flow restriction safe?
It has a substantial safety literature and this system has been examined specifically across a range of cuff pressures. That said, it is not appropriate for everyone. Cardiovascular conditions, clotting disorders, and pregnancy are among the reasons screening happens before a first session.
Does it replace my normal training?
No, and we would not position it that way. It is a genuine stimulus that spares the joints, which makes it a useful addition to a training week or a bridge when heavy load is not available to you. Resistance training and skill work still matter.
How is it different from EWOT?
EWOT increases the oxygen you breathe during exertion. Vasper restricts venous return and cools you. Both sit in the Capacity and Performance system, they work through different mechanisms, and they are often sequenced together rather than chosen between.
Can I use it on a heavy training day?
Sometimes, and it depends what you did. Because this is a real stimulus rather than a passive session, our team schedules it around your training rather than assuming it can be added on top without cost.
How often should I do it?
Where prescribed, typically two to three times a week. Frequency is set within your protocol alongside whatever else you are doing.
Is it included in membership?
Access depends on your tier. Circuits are the unit of membership, and which modalities appear in yours is set by your protocol rather than chosen from a menu.
Sequenced deliberately.
Modalities in this system address different parts of the same chain. These are the ones most often paired with it.
Hyperbaric Oxygen
Oxygen delivered under pressure, requiring nothing of you physically. Frequently follows a session here.
Contrast Therapy
Guided heat and cold cycling, scheduled around training rather than immediately after every session.
Performance
See how this modality sits alongside the others addressing capacity, output, and durability.
Reserve Your Consultation.
Your protocol starts with a conversation and a baseline, not with a modality. In it we will:
- Understand what you are actually trying to change
- Screen for cardiovascular and clotting considerations
- Place it in your week alongside your other training
- Explain honestly what the research does and does not show
- Build a protocol across the systems that matter for you