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Integrated underwater treadmill


The integrated underwater treadmill is completely integrated in the movable swimming pool floor. Lowering the movable swimming pool floor results in reduction of weight bearing for the patient. Therefore this excellent combination results in an exercise environment for patients in any stage of rehabilitation, ranging from young children to adults. The unique combination of a movable swimming pool floor and underwater treadmill results in a superior multi-role low impact exercise environment.

When the treadmill is not used, the parallel bars can be removed and the entire area of the exercise pool can be used for other underwater exercises.


Exercising on an underwater treadmill is an excellent combination of weight bearing reduction, while at the same time the patient can perform walking exercises to mobilise otherwise stiff or injured joints.

Underwater treadmills are the pinnacle of underwater exercise equipment, and can be used for low impact obesity treatment. The strict walking rhythm it imposes has added value in neurology.

We offer the biggest collection of publications about hydrotherapy.


EWAC Medical has been designing and building movable swimming pool floors for over 25 years and has successfully finished more than 1.000 projects worldwide. We continually work on improvement and innovation. Even though underwater treadmills are a relatively new development, experience with these products is increasing rapidly. Underwater treadmills can be integrated in any of the current EWAC Medical products which makes our proposition incredibly competitive.

That is why EWAC Medical is world market leader in hydrotherapy.

For more information and documentation, please contact EWAC Medical.


In-depth information

EWAC Medical does not only supply underwater treadmills, but also contributes actively in acquiring and dispersing knowledge about hydrotherapy. We are also actively involved in developing new underwater exercise equipment for rehabilitation purposes. On this page you will find more in-depth information about all the aspects that come into play when applying an underwater treadmill.

The proven value of exercising on an underwater treadmill

Exercising on an EWAC Medical underwater treadmill offers a great number of advantages.



– Actuated with safe low voltage power drive – Optimal security of patients is guaranteed
– Infinitely adjustable speeds from 0,1 up to 11 km/h – Precise control of exercise intensity
– Slow up and down tuning during start and stop – Pleasurable walking experience
– Patient training program can be stored – Follow progress of the rehabilitation process
– Can be mounted into an existing pool – Added functionality of existing situations
– Can be mounted in a modular pool – Added functionality of existing and new situations
– Can be integrated in an adjustable floor – Adjust for optimal weight loading of the patient
– Can be retrofitted in existing adjustable floors – Increase the possibilities of a current installation
– Flush with deck of adjustable floor – More functionality within the same available space
– Active interaction in the water between patient and therapist – Therapist can actively manipulate the patient during exercises

Overview of our options (see our product configurator)

Underwater camera This special underwater camera enables the therapist to track the movements of the patients, and if necessary record the movements for further analysis. By comparing images from multiple sessions one can get a clear picture of the progress made by the patient.
Counter current unit or Jetstream Countercurrent unit or jetstream. A jetstream offers exercise resistance to the patient moving against the flow. A wall nozzle produces a strong water jet which is aimed at the patient, and depending of the required exercise load, can be softened with air.
Underwater lighting Underwater lighting is highly recommended to improve the sight through, for example, an underwater window. The lighting can be either delivered in monochrome or in colours.
Observation windows Observation windows can be placed in regular pools as well as modular pools. Observation windows enable the therapist to supervise the executions of the patient optimally.

Two types of underwater treadmills

EWAC Medical supplies two different underwater treadmills:

Integrated underwater treadmill in an adjustable pool floor
The integrated underwater treadmill is completely flush with the adjustable pool floor. Weight bearing of the patient can be adjusted by lowering the adjustable floor. From young children to adults, in any stage of rehabilitation, the combination of an underwater treadmill with an adjustable floor offers an excellent exercise environment.
When the treadmill is not used, removing the parallel bars frees the entire area of the exercise pool for other underwater exercises.

The underwater treadmill can be fitted in any new adjustable pool floor, but can also be excellently retro-fitted in existing EWAC Medical adjustable floors.

Drop-in underwater treadmill
For existing pools with a fixed depth the drop-in underwater treadmill is an excellent piece of exercise equipment. The freestanding underwater treadmill can be placed in any position on the bottom of the swimming pool. The drop-in underwater treadmill turns the pool into a multi role, low impact exercise environment. The underwater treadmill can be completely removed out of the pool, to clear the available space for other underwater exercises.

It can be used in virtually any existing pool situation and works plug and play.

Both underwater treadmills meet the demands set in the ISO-norm 13485.

Technical specifications

Drop-in underwater treadmill Intergrated underwater treadmill
Dimensions – Total L 1540 x B 1040 x H 1740 mm (including handrails) Dimensions – Total L 1750 x B 1200 mm
Dimensions – Training area L 1150 x B 550 mm Dimensions – Training area L 1400 x B 850 mm
Speed capabilties 0,1 – 11.0 km/h Speed capabilties 0,1 – 11.0 km/h
Power supply 16 Amp 220/240 V single phase 50/60Hz Power supply 16 Amp 220/240 V single phase 50/60Hz
Maximum load 500 kg Maximum load 500 kg
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Product Videos


Narasaki (2019) Aquatic treadmill walking at three depths of water in people with traumatic brain injuryPark (2014) The Effect of Underwater Gait Training on Balance Ability of Stroke PatientsZotz (2013) Aquatic physical therapy for Parkinson’s diseaseChien (2020) Land versus water HIIE (HIIT) effects on muscle oxygenation and physiological parameter responses in postmenopausal women (Scientific Reports by Nature)Hall (2004) Cardiorespiratory responses to aquatic treadmill walking in patients with rheumatoid arthritisDenning (2010) Underwater Treadmill Exercise as a Potential Treatment for Adults With OsteoarthritisRoper (2013) Acute Aquatic Treadmill Exercise Improves Gait and Pain in People With Knee OsteoarthritisBressel (2014) High intensity interval training on aquatic treadmill in adults with osteoarthritis: effect on pain, balance, function and mobilityNiks & ‘t Hoofd (2017) Aquamentia, Introducing a Newly Developed Swimming Intervention for People With DementiaAndrade (2017) Oxygen uptake and body composition after aquatic physical training in women with fibromyalgia; A randomized controlled trialLim (2014) The Influence of Short-term Aquatic Training on Obstacle Crossing in Gait by the ElderlyBarbosa (2014) Effect of Watsu therapy on psychological aspects and quality of life of patients with temporomandibular disorderPérez-de la Cruz (2020) Comparison of Aquatic Therapy vs. Dry Land Therapy to Improve Mobility of Chronic Stroke PatientsHeywood (2018) Force during functional exercises on land and in water in older adults with and without knee osteoarthritis; Implications for rehabilitationBrugghemans (2011) Parkinson gait balance endurance (dutch)Squires Blackwell (2012) relationship of metabolic costs of aquatic treadmill versus land treadmill runningPohl (2003) The physiological responses to running and walking in water at different dephts

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