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POWERbreathe K5

6 Reviews

Price range: £475.00 through £675.00

POWERbreathe K-Series
Close up of a man with a cycling helmet on using a POWERbreathe K5
Man standing by a lake using a POWERbreathe K5
A woman sat at a breakfast table using K-Series
The POWERbreathe K1. This device offers an entry level of breathing training.
The POWERbreathe K3. This device offers an advanced level of breathing training.
3 quarter image of the K4 in front of a partial image of a laptop
POWERbreathe K4 Breathe-Link Software customise screen
The POWERbreathe K5 offers a professional level of breathing training, testing and monitoring. Shows a partial laptop next to it.
POWERbreathe K5 Breathe-Link Pro View
3D View
Digital Inspiratory Training POWERbreathe K-Series
Close up of a man with a cycling helmet on using a POWERbreathe K5
Man standing by a lake using a POWERbreathe K5
A woman sat at a breakfast table using K-Series
The POWERbreathe K1. This device offers an entry level of breathing training.
The POWERbreathe K3. This device offers an advanced level of breathing training.
3 quarter image of the K4 in front of a partial image of a laptop
POWERbreathe K4 Breathe-Link Software customise screen
The POWERbreathe K5 offers a professional level of breathing training, testing and monitoring. Shows a partial laptop next to it.
POWERbreathe K5 Breathe-Link Pro View

POWERbreathe K5

6 Reviews

Price range: £475.00 through £675.00

Professional-Grade Breathing Trainer - The ultimate in digital inspiratory muscle training.

Featuring Breathe-Link® Software that offers real-time biofeedback and intelligent resistance, the POWERbreathe K5 is the gold standard for inspiratory muscle training. The K5 is the most advanced model in the K-Series range, offering the most comprehensive features, including an advanced test mode and full data review. Designed for coaches, elite athletes and people looking to improve their performance, the K5 provides unmatched precision and customisation.

Includes all K4 features, plus:
• S-Index® rating to easily test the strength of your breathing muscles and monitor strength improvements.
• On board memory that can store up to 36 sessions of the most important biofeedback markers – Load (cmH2O), Power (Watts), Volume (Litres), Energy (Joules) – to help you keep track and monitor your training progress in an easy-to-understand historical graphical display. Note: Flow (Litres/second) is shown on the Breathe-Link® Software only
• The K5 allows for up to 30 user profiles and 1200 stored sessions per user, making it an essential biofeedback tool for teams and coaches, as well as individuals.
• Advanced statistical review for deep training analysis
• Customisable Training: Create, personalise, and upload your own sessions for tailored respiratory workouts.

The K5 is the gold standard in digital inspiratory muscle training - everything you need to unlock the very best from your breathing.

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Description

The POWERbreathe K-Series represents is the pinnacle of Inspiratory Muscle Training (IMT) – intelligent, digital breathing trainers that delivers unmatched precision, performance and progress tracking. The K-Series is designed for elite athletes, sports teams and those looking to improve their health.

All POWERbreathe K-Series devices use Pressure Threshold technology and a unique patented electronic tapered flow resistance system that automatically adapts each breath to your muscle strength. This means the resistance is constantly monitored and tapered to match your reducing respiratory muscle strength throughout each breath, allowing greater flow and maximum volume rather than cutting off halfway through a breath. The result:

  • More work per breath compared to traditional threshold pressure devices
  • Greater airflow and full breath volume
  • A more complete and effective breathing training session.

Precision Engineering in Every Breath

A calibrated electronic pressure sensor detects when you generate enough force to open a digital valve – engaging your breathing muscles more effectively.  This is in tandem with the electronic tapered flow resistance which is what makes the K-Series so unique, adjusting resistance throughout the breath, making training more natural, efficient and comfortable.

After analysing your inspiratory (breath) strength, the device will automatically determine your optimal starting resistance. As you breathe, resistance gradually decreases to mirror the natural decline in muscle force that naturally occurs towards the end of each breath. This ensures that each session delivers maximum results in less time -your training is more effective and faster.

The K-Series also offers manual resistance for full control and flexibility.

Advanced Performance Tracking

Unlike traditional constant load or flow devices, which apply fixed resistance, the POWERbreathe K‑Series offers smarter, more natural and comprehensive training, for a smoother, more natural breathing cycle. This promotes deeper, fuller breaths, improved comfort and better overall respiratory muscle conditioning.

The POWERbreathe K4 and K5 come with Breathe-Link® Live Feedback Software, which displays training data and strength tests in real time. The Breathe-Link® Software stores detailed metrics for up to 30 user profiles, making it ideal for personal training, team coaching, and clinical monitoring. For a detailed overview of each model’s capabilities, take a look at our K-Series Features comparison chart.

For a more technical look at the difference between a Flow Device, a Constant Flow Device such as the Classic or Plus and a Tapered Flow Device like the K-Series, view our Comparison Table >

Breathe Stronger. Train Smarter. Go Further

Whether you’re recovering, competing, or optimising your respiratory health, the POWERbreathe K-Series provides the intelligence, precision and performance to help you breathe stronger and achieve more.

What is POWERbreathe IMT?

K-Series Range

For a more detailed look at the different functions available with each Model, take a look at our K-Series Functions Table >

POWERbreathe K1

Digital Breathing Trainer – Your introduction to intelligent inspiratory muscle training.

The K1 is the perfect starting point for anyone looking to build breathing strength and efficiency with the support of digital feedback. With tapered load technology, breathing pacing guidance, and real-time training data, it takes you beyond mechanical trainers and into smarter training.

Simple, effective, and intelligent – the K1 is your entry point into digital breathing training.

POWERbreathe K3

Enhanced Digital Breathing Trainer – Smarter features for more detailed feedback.

The K3 builds on the K1 with advanced testing and session analysis tools. With the Single Breath Test and S-Index ratings, you can measure your inspiratory strength against population averages and track progress with greater accuracy. Used in the 2022 University of Colorado research that demonstrated Blood Pressure improvements when undertaking Breathing Training.

The K3 is a powerful tool for those who want more insight and measurable progress.

POWERbreathe K4

Connected Breathing Trainer – Real-time performance, advanced analytics.

The K4 takes training to the next level with Breathe-Link® Software, allowing you to see every breath on screen, in real time. Perfect for athletes and serious trainers, the K4 combines precision training with detailed analytics.

For those who want live feedback and advanced analysis, the POWERbreathe K4 turns training into data-driven performance.

POWERbreathe K5

The K5 is the gold standard in digital inspiratory muscle training – everything you need to unlock the very best from your breathing. A Professional-Grade Breathing Trainer – the ultimate in digital inspiratory muscle training.

Featuring Breathe-Link® Software that offers real-time biofeedback and intelligent resistance, the POWERbreathe K5 is the most advanced model in the K-Series range, offering the most comprehensive features, including an advanced test mode and full data review. Designed for coaches, elite athletes and people looking to improve their performance, the K5 provides unmatched precision and customisation.

Breathe-Link® Software

The POWERbreathe K4 & K5 with Breathe-Link® Software

  • Real-Time Feedback: View live metrics including Load, Power, Volume, Flow, Energy, and Strength-Index (S-Index®)
  • Live Breath Test: Measures inspiratory muscle strength and peak inspiratory flow in a single breath
  • Live Training – Pro View: Detailed, simultaneous plotting and analysis of all inspiratory muscle training data
  • Custom Mode: Create and upload your own personalised breathing training sessions
  • PC & Mac Compatible: Connect the K4 and K5 via Breathe-Link® Software to view historical data and track progress over time
  • Click here to view POWERbreathe K5 Screenshots

POWERbreathe K5 Breathe-Link® Software Screenshot Examples

Benefits

The K-Series is the ultimate way to achieve fast, effective breathing training results. View our Product Range Comparison Table to see why >

Breathing Muscle Training benefits include:

  • Strengthens breathing muscles
  • Improves lung stamina and wellness
  • Helps athletes, singers, and those with a variety of health conditions

POWERbreathe K-Series Benefits include:

  • Patented Adaptive Resistance: Electronically tapered resistance matches your breath for longer, more effective inhalations
  • Scientific Precision: Backed by peer-reviewed studies validating training load, strength metrics, and inspiratory energy output. The POWERbreathe K3 was device used in the 2022 University of Colorado Study investigating the anti-hypertensive impact of high resistance inspiratory muscle strength training
  • Elite-Level Conditioning: Enhance breathing strength, stamina, and control for sport, rehabilitation, or health optimisation

How it Works

  • Initial Strength Test: Start each session with two unresisted breaths to assess your maximum inspiratory capacity using the S-Index®
  • Adaptive Loading: Resistance is applied dynamically from breath 3 onward, tapering throughout each inhalation to match your naturally decreasing strength
  • Live Tracking: Key performance metrics are shown on the built-in LCD screen with the optional real-time Breathe-Link® Software for K4, K5 and KH2 for immediate feedback
  • Progressive Training: Over time, the K-Series increases the starting resistance automatically to align with your gains in strength and endurance

Measurement Validity

The following study concludes that the K-Series device ‘provides automatically processed and valid estimates of physical units of energy during loaded breathing task.’

The following study suggests that S-Index® might be more appropriate for measuring inspiratory muscle performance than the currently most used test, PImax.

The following study finds that ‘It is feasible and reliable to evaluate the maximum repetition of inspiratory muscles in healthy individuals.’

The following research found that by using the Strength-Index® Test to assess and enhance respiratory muscle strength, athletes will experience tangible improvements in both endurance and overall athletic capability:

Which Model

Unlike the Mechanical Models, such as the POWERbreathe Classic and Plus, the K-Series automatically set the optimal training resistance, so there’s no need to manually adjust the level. Each model within the K-Series comes with its own unique set of features, allowing you to simply choose the one that delivers the guidance, feedback, and functionality that best supports your training goals.

The following resources will help you decide the most appropriate K-Series device for your needs.

K-Series Model Comparison Table

 

What's in the Box

  • GB, AUS, EU or US plug (depending on your country of purchase)
  • Cradle to house the device while charging
  • Mouthpiece TPE (Thermoplastic Elastomers)
  • Nose clip
  • Storage pouch
  • 4 x Cleansing Tablets – except for in the USA. Genuine POWERbreathe devices will not contain POWERbreathe Cleansing Tablets in the USA, as these tablets are not approved for sale and/or distribution within the USA by the regulatory authorities. Read more about Counterfeit products.
  • Market specific user manual – supplied for end user’s country e.g. English for UK & Ireland, Spanish for Spain, French for France etc.
  • Breathe-Link® Software will need to be downloaded (K4 & K5 only)

FAQ

When connected to the Breathe-Link® software, you can add up to 30 user profiles on the K5, or 10 on the K4, who you then select in the software. Each user can then train on their own profile. If the device is used while disconnected from the software, then only one profile will be in the hand-held unit, the one set by the user on the unit. The results will refer to this user.

If your battery is no longer charging it may need replacing. It is like any other battery, such as in your smartphone, and will become less efficient with every charge. It is at this point that your battery will start to lose its capacity to hold the charge. If this is the case:

  • If you purchased your device on powerbreathe.com, please contact us regarding your battery replacement request and we will get back to you.
  • If you purchased your device from one of our official distributors or stockists, please contact them directly in the first instance.

There is a service charge for the replacement of a K-Series battery, as it must be replaced by a technician to ensure all connectors are correctly located. It is then fully tested before being returned to you.

It really varies based on the User i.e. Medical, Trainer, Private Individual, and personal needs.

We offer the Calibration Service to meet the needs of the respective Groups. Medical generally require all equipment to undergo an annual calibration, as they rely very much on the data. Private individuals may also wish to have this service for peace of mind in the knowledge that their device is functioning correctly. However, due to Calibration being a chargeable service, you may choose not to.

Certainly KH2, KH1 products designed for Medical Markets should be calibrated annually.

These levels are more like “Intensity” levels so once you are comfortable with working at the Very Light intensity and/or your improvement appears to flat line with little or no improvement, then you Manually increase the intensity of your work out to Medium for example.

Each time you use your POWERbreathe, your first two breaths will calculate your optimised working level (Auto-optimising feature). This will step incrementally over the next three breaths to your training load for the session, and is based on the level of intensity you have manually selected.

The most important message is to ensure that you can maintain your 30 breaths for the session, if the Level or Intensity is too high then you will find that the session will be short and you are training to fail. Consider as a comparison: Weight lifting as an example – the incomplete Arm curl or doing half completed repetitions within a set – It is more important to complete those 30 reps.

In order for you to use your mask with the K-series units you will require the POWERbreathe Spacer

People suffering from COPD and Asthma and may also require assistance with Oxygen, so there is also an “Oxygen Mask adapter” which links also to the POWERbreathe spacer.

The KH1 is a medical device and includes features and results for more medical requirements, including measurement of a Single Breath Test MIP (maximal inspiratory pressure) and measurement of a Single Breath Test PIF/Flow Test (inspiratory muscle strength, peak inspiratory flow rate and inhaled volume). It also provides test results specifically for MIP (cmH2O) and PIF (litres). 

The KH1 has been developed for the following:

  • Doctors 
  • General Practitioners 
  • Respiratory and cardiac specialists
  • Surgeons 
  • Physiotherapists 
  • Nurses 
  • Patients with respiratory problems 

The K5 doesn’t include testing for MIP or PIF, nor therefore provide results. The K5 was developed for anyone who wished to improve their breathing strength and stamina for whatever reason, including individuals and sports people.

The K5 has additional features: the Pro Analysis View and the Custom Mode.

The Pro Analysis View enables you to see line graphs of each breath opposed to bar charts. This is good feedback to enable you to aim for a long flat line on the graph although some people prefer the bars.

The Custom Mode allows you to set a custom number of breaths at a selected load as opposed to the standard 30 breaths. For example you can select maybe 10 breaths on a heavy load or 60 breaths on a light load. This session can be done using the computer or uploaded to the unit. If you go for the K4 you could still do 10 of the 30 breaths and manually select a higher load if you specifically wanted to do this session.

The POWERbreathe unit will only show the highest load set in the custom routine. It is advised to use the Breathe-Link® software to get a more accurate view of pressure load. The values shown on the Breathe-Link® software is the average pressure (average weight lifted) for the entire session. It is possible to analysis the data in greater detail in the Review Screen see Chapter 10 Data Review for more information.

The POWERbreathe K-Series unit will automatically estimate your training load at the beginning of every training session. Using this method, the device will adjust the training load every time you start a new session and as the strength of your inspiratory muscles increases. Automatic setup of this load takes place during the first two breaths of each training session. The intensity levels represent a percentage of your estimated load that you will be training at.

The session number counts the total number of sessions you have completed (up to 999). However, the K-Series device can only store a maximum of your last 36 training session results – this is limited by the memory on the device and the display area on the screen.

How To Clean Your POWERbreathe K-Series IMT Device

Precautions & Contraindications

A list of precautions and contraindications can be found here.