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Kinvent K-Bubble
Kinvent K-Bubble
Kinvent K-Bubble
Kinvent K-Bubble
Kinvent K-Bubble
Kinvent K-Bubble
Kinvent K-Bubble
Kinvent K-Bubble

Kinvent K-Bubble

by Kinvent
$1,290.00 - $1,290.00
$1,290.00
$1,290.00 - $1,290.00
$1,290.00

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Pressure Dynamometer

Kinvent K-Bubble

Kinvent describe K-Bubble as a wireless inflatable pressure sensor that measures muscle activation, strength and endurance through controlled air pressure variations. Plug the sensor into an inflatable accessory, have the body part press into it, and the change in internal air pressure becomes a force figure in the Kinvent app while the effort is still under way.

That pneumatic route suits positions where a rigid pad has nowhere to sit. A ball between the knees captures adductor effort. A cushion behind the head captures work at the cervical spine. Inflating the accessory harder or softer sets how much resistance the body meets, which is how Kinvent describe its customizable resistance levels for progressive rehabilitation and strength training.

Reads
Air pressure
Converted into force
Connection
Wireless
To the Kinvent app
Weight
4.41 lbs
Sensor and accessories
Dimensions
13.78 x 10.24 x 13.78
Inches, as published
Muscle activation, strength and endurance Isometric, isotonic and biofeedback work Resistance set by inflation level Real-time visual feedback in the app
Kinvent K-Bubble pressure dynamometer

The Mechanism

Air Carries The Measurement

The sensing element sits in the air line, which is why the contact surface can be soft, curved and any size the accessory allows.

🌞
Pressure translated to force
Squeezing or pressing an inflated accessory raises the air pressure inside it. K-Bubble reads that controlled pressure variation and turns it into the muscle activation, strength and endurance figures Kinvent list for the sensor.
Wireless pressure sensing
⚽
Inflatable accessories
Kinvent picture the sensor with a grip accessory, an inflatable balloon and a cushion. Changing the accessory changes the shape of the contact, so the same sensor covers a squeeze between the knees and a press against the back of the head.
Interchangeable
💨
Inflation sets the load
How hard the accessory is pumped decides the pressure level the body works against. Kinvent call this customizable resistance, and it is what lets one sensor run a first rehab session and a later loaded one without new hardware.
Adjustable levels
📱
Live biofeedback
The Kinvent app shows the reading as it changes. Kinvent position that instant visual feedback as a way to help patients improve control and muscle coordination, so the display is part of the exercise rather than a report afterwards.
Real-time display

What It Reports

The Figures You Take Away

Kinvent name muscle activation, strength and endurance as what the sensor measures. The app turns each effort into numbers you can store against a profile.

⚡
Muscle Activation
Read through air pressure variation
🔥
Strength
Force production against the accessory
⏱
Endurance
Output held across a sustained effort
📈
Maximum Force
The peak of a single effort
📊
Mean Force
Average across a hold you time
🗓
Progress Over Time
Longitudinal tracking in the app

Closer Look

One Sensor, Several Shapes Of Test

Kinvent K-Bubble used for a squeeze test
Squeeze

Adductors And Lower Limb Work

Compressed between two limbs, an inflated accessory gives the adductors something to work into that adapts to the space available. Kinvent list lower limb rehabilitation among the regions this sensor is used for, and the inflatable contact follows the position instead of forcing the limb to meet a flat pad.

  • Inflatable contact adapts to the gap between the limbs
  • Compression read as a force value in the app
  • Maximum and mean force from one effort
  • Inflation level sets the working resistance
  • Same setup repeated on each side in turn
Adductors Lower limb Pneumatic
Kinvent K-Bubble used for a pressing test
Press

Neck, Back And Postural Control

Kinvent name neck and back rehabilitation and core and postural training among the uses for this sensor. A soft, curved contact makes those positions workable, and because the reading updates throughout the press, a slow build and a sharp spike look different from each other on screen.

  • Cushion contact for cervical spine and back work
  • Continuous reading during the whole effort
  • Posture, stability and balance work through controlled pressure
  • Visual target for holding a steady level
  • Results stored against a profile in the Kinvent app
Neck and back Core Postural training
Kinvent K-Bubble sensor with its inflatable accessories
Accessories

Grip, Balloon And Cushion

The accessories Kinvent show with K-Bubble are a grip accessory, an inflatable balloon and a cushion. Each one presents a different contact area to the body, which is how a single pressure sensor covers hand and grip work, a squeeze between the limbs, and a press into a padded surface.

  • Grip accessory for hand and grip based measurement
  • Inflatable balloon for larger pressure based exercises
  • Cushion for additional positioning options
  • Sensor stays the same across all three
Grip Balloon Cushion
Kinvent app showing K-Bubble assessments on a tablet
Software

The Kinvent App

Kinvent describe the app as supplying quantifiable data, real-time performance feedback and longitudinal progress tracking, with assessment exercises laid out in an interactive grid. The same app runs the rest of the Kinvent sensors, so a K-Bubble record sits alongside whatever else you measured in that session.

  • Quantifiable data from each effort
  • Real-time performance feedback during the exercise
  • Longitudinal progress tracking across sessions
  • Assessment exercises in an interactive grid
  • Shared with the rest of the Kinvent sensor range
Kinvent app Wireless Progress tracking

Key Applications

Where Kinvent Put This Sensor To Work

These are the applications Kinvent publish for K-Bubble, in their own framing.

💪
Muscle Activation And Strength Assessment
Evaluates muscular endurance, stability and force production for injury prevention and recovery.
🧘
Core And Postural Training
Helps improve posture, stability and balance through controlled pressure based exercises.
🩹
Rehabilitation And Injury Recovery
Assists progressive recovery programs, particularly for neck, back and lower limb rehabilitation.
🏃
Functional Movement And Performance
Supports sports specific training to improve muscle engagement and efficiency.
🔁
Isometric And Isotonic Exercise
Kinvent list isometric and isotonic work alongside biofeedback exercises for this sensor.
🎯
Interactive Rehab And Biofeedback
Instant visual feedback via the app, helping patients improve control and muscle coordination.

The Range

Three Ways Kinvent Take Force In

One app runs all three. The route the force travels decides which tests each sensor suits.

Kinvent K-Push
K-Push
Handheld dynamometer pressed against a limb for isometric strength testing.
Rigid pad contact Isometric strength Handheld Kinvent app
Shop the K-Push
You're Here
Kinvent K-Bubble
K-Bubble
Wireless inflatable pressure sensor for muscle activation, strength and endurance.
Inflatable contact Activation and endurance Adjustable resistance Kinvent app
Currently viewing
Kinvent K-Pull
K-Pull
Traction dynamometer for tensile force, where the effort pulls rather than presses.
Tensile force Traction testing Kinvent app
Shop the K-Pull

Full Spec Sheet

Specifications

Dimensions & Build

Shipping dimensions 13.78 x 10.24 x 13.78 in
Weight 4.41 lbs
SKU 15-4344

Sensing

Sensor type Wireless inflatable pressure sensor
Measures Muscle activation, strength, endurance
Method Controlled air pressure variation
Resistance Customizable pressure levels

Exercise Modes

Supported work Isometric, isotonic, biofeedback
Accessories shown Grip, balloon, cushion
Body regions named Neck, back, lower limb, core

Software & Connectivity

Connection Wireless to the Kinvent app
Feedback Real-time visual, in app
Data Quantifiable results, longitudinal tracking

Trusted & Certified

Kinvent's published certifications

These are the certifications and registrations Kinvent publish for their platform and their quality and information security systems. They cover the company and its medical device and data handling, not a performance claim about this sensor.

CE
CE Mark
European Union conformity
FDA
FDA
US Food and Drug Administration
HC
Health Canada
Medical device registration
13485
ISO 13485
Medical device quality management
9001
ISO 9001:2015
Quality management
27001
ISO 27001:2022
Information security management
HDS
HDS
French health data hosting
🔒
HIPAA
Healthcare privacy compliance

Who Uses Kinvent

Over 10,000 professionals and organizations

Kinvent name the following among the organizations working with their sensors. The list is theirs, published on their own product pages.

HSS
Hospital for Special Surgery
Orthopedics and sports medicine
MLB
Major League Baseball
Professional baseball
NFL
National Football League
Professional football
NBA
National Basketball Association
Professional basketball
MLS
Major League Soccer
Professional soccer
🎓
Stanford University
Collegiate athletics and research

Questions

Frequently Asked Questions

Pressing on a sealed, inflated accessory raises the air pressure inside it. Kinvent describe K-Bubble as measuring muscle activation, strength and endurance through controlled air pressure variations, which the Kinvent app shows as a reading while the effort is happening.
Kinvent picture three: a grip accessory for hand and grip based measurement, an inflatable balloon for larger pressure based exercises, and a cushion for additional positioning options.
No. Kinvent do not publish a pressure range, a force range or an accuracy figure for K-Bubble on their product page. The only hard numbers on record are the shipping dimensions of 13.78 x 10.24 x 13.78 in and a weight of 4.41 lbs. We do not quote a figure we cannot source.
Kinvent publish no battery figure for this sensor. What they do state is that it is wireless and connects to the Kinvent app. If run time matters to your setup, ask us before ordering and we will put the question to Kinvent rather than guess at a number.
Yes, through how far the accessory is inflated. Kinvent list customizable resistance levels as a feature, adjusting to different pressure levels for progressive rehabilitation and strength training. A softer accessory gives way sooner, a firmer one holds its shape.
No. Kinvent list isometric, isotonic and biofeedback based exercises for this sensor. Because the air path responds throughout the contact, a moving effort produces a reading in the same way a held one does.
Kinvent name neck, back and lower limb rehabilitation and core and postural training. The inflatable contact is what makes those positions practical, since a curved, padded surface can sit where a rigid pad cannot.
Kinvent describe the app as providing quantifiable data, real-time performance feedback and longitudinal progress tracking, with assessment exercises presented in an interactive grid. The same app runs the rest of their sensor range.
That is the point of it. Kinvent position the instant visual feedback as interactive rehab and biofeedback training, helping patients improve control and muscle coordination rather than only recording a result for later.
Kinvent position it for rehabilitation, strength training and sports performance. In practice that means rehab clinics, physiotherapists, sports medicine departments and performance staff. K-Bubble supplies the measurement; the choice of test and the reading of the result stay with the professional.
K-Push takes force through a rigid pad held against a limb. K-Bubble takes it through air inside a soft accessory, which opens up positions where a hard pad cannot be placed comfortably, such as a ball held between the knees or a cushion behind the head. See the K-Push page for its own published figures.
Kinvent publish CE, FDA, Health Canada, ISO 13485, ISO 9001:2015, ISO 27001:2022, HDS and HIPAA. Those cover the company, its medical device quality system and its handling of health data. They are not a performance claim about this sensor.

 

  • Measures: air pressure, converted into a force value
  • Measurement range: Kinvent publish no pressure range, resolution or sampling rate for this sensor
  • Dimensions: 13.78 x 10.24 x 13.78 in
  • Weight: 4.41 lbs, sensor and accessories as listed
  • Connectivity: Bluetooth
  • App: K-Force app on a phone or tablet
  • What it records: peak and mean force per effort, held under the profile you have open
  • Measures: force, converted from the change in air pressure inside an inflatable accessory
  • Plugs into: any inflatable touch ball or cushion, which becomes the contact surface
  • Parameters: maximum force from the peak of the effort and mean force across a hold you choose the length of
  • Resistance: set by how hard the accessory is inflated before the test begins
  • Live trace: pressure reads continuously in the K-Force app during the whole effort
  • Test types: isometric holds and moving efforts, with a visual target for holding a steady level
  • Typical setups: a ball compressed between the limbs, or a cushion behind the head
  • Records: results stored against a profile beside readings from other Kinvent sensors
  • Connection: Bluetooth to a phone or tablet running the K-Force app
  • Who uses it: physiotherapy clinics, rehabilitation teams and performance departments
  • 1 K-Bubble pneumatic dynamometer
  • Accessories: Kinvent state that all K-Bubble accessories are included and do not break the set out item by item