DAVID Exercise Equipment

Exercise Equipment for the Hip and Knee

Controlled. Gentle. Effective.

Watch the full video

Exercise Equipment for pre and post-operative treatment

DAVID’s hip and knee equipment is essential to meet the challenges of the ageing population and improve surgical outcomes with pre- and post-operative treatment programs. With the biomechanically optimized exercise equipment, mobility and isometric strength measurements can be taken, and these values are converted to training parameters through the use of the EVE Software


David Hip & Knee solution is designed to tackle various hip and knee-based disorders using the most effective  cloud-based rehabilitation system available.

The technology behind our Exercise Equipment

A well-designed exercise prevents harmful movements, is gentle on the joints but highly fatiguing for the muscles and can be easily fine-tuned for each individual. A team of highly experienced engineers and exercise specialists design our medical exercise equipment,producing the most advanced rehabilitation technology.


For DAVID, safety represents much more than just the matters in CE- certification. Safety means that training should create positive results in your body and not negative effects such as strained muscles and hurting joints.


Within the safety limitations, all exercises should be as effective as possible. This has been always the primary goal in our equipment design. To achieve this, DAVID has participated and initiated research on various areas for a over 25 years.


The third objective is to make the use of the technology a positive experience. Our technology is designed to be user-friendly so that anyone can use it without external help after receiving initial guidance and instructions.

The DAVID devices are classified as Electromechanical rehabilitation devices (Medical Class 1m) with measuring function (Directive 93/42/EEC).

Technology and Design

Therapy Software for our hip and knee devices

The comprehensive EVE software platform (available in more than 20 different languages) for therapists is essential to manage our Exercise Equipment. The software establishes training templates, analyzes patient outcomes and tracks patient satisfaction. The software uses artificial intelligence and algorithms based on patient biofeedback. The EVE software is designed to minimize the administrative burden on therapists so that they can focus on the patient.

  • Intake Automation – Email and text intake forms and functional outcomes to patients
  • Measuring function – Mobility and isometric test functionalities
  • Therapy Software – Easily document treatments via daily notes
  • Training Programs – Automation of training programs through AI
  • Home Exercise – Home exercise programs
  • Medical Questionnaires – Digitization of medical questionnaires
  • Schedule Appointments – via APP and embedded calendars
  • Hl7/API Integration – Connect EVE with your existing EMR system or other software/hardware vendors

EVE Software Platform

Patient Engagement with the EVE Mobile App

The EVE app is an interactive, patient-friendly mobile app for tracking training data and sharing exercise programs. This app is an effective and efficient way to communicate with therapists and patients alike.

With the EVE Mobile App you can:

  • Guide and track home exercises
  • Chat with your therapist or group members
  • Manage appointments with your therapist or training group
  • Notify patients with a task module to improve their health
  • View all training results and reports

Patient App

Tackling the degeneration with movement

Human joints were designed by nature to last about 40 years. Degenerative diseases of the joints have become the main reason for pain and, consequently, a decline in the quality of life in middle-aged and elderly individuals.

The popularity of football, ice hockey, and skiing has all contributed to the increased frequency of injuries, such as MCL and ACL tears. There is a growing consensus in the medical community that controlled physical activity can contribute to preventing and healing various knee and hip problems.

It is a proven fact that for many musculoskeletal illnesses requiring surgery as treatment, the outcome has been significantly improved by rehabilitative muscle training.

Several studies have shown that movement can act as medicine for painful joints. With joints like the knee, which are relatively simple structures, exercises are simple, and loading is easy to apply in a controlled manner. Specially designed devices are required to isolate the target area to provide total control of the movement and loading.

All movements should start with limited range and low loading, within the pain tolerance. Time is essential since physiological changes are slow. Ideal treatment should run for three months with an ongoing program afterwards.

Typical indications


Osteoarthritis is the most common cause of chronic disability among the aging population. The effectiveness of an exercise in knee and hip osteoarthritis is attributed to its ability to reverse muscle sensomotoric dysfunction (weakness, fatigue, poor control) preventing abnormal movement and restore normal biomechanics, effecting better gait, relieving pain and improving function.
The medial collateral ligament is one of the most commonly injured ligaments of the knee. The treatment of medial-sided knee injuries has evolved from surgical treatments to mostly non-operative management with an appropriate functional rehabilitation program. Active range of motion is initiated early to prevent stiffness with concomitant strengthening exercises.
Patellar instability describes patellar dislocation, patellar subluxation, and general symptomatic patellar instability. It accounts for 11% of the musculoskeletal symptoms and there is a higher incidence in females. Patellar instability can often be treated successfully without an operation. Ideal rehabilitation requires the avoidance of pain during exercise.
The anterior cruciate ligament of the knee controls movement of the lower leg bone (tibia) relative to the thigh bone (femur) and guides knee extension. The goal of the treatment of ACL ruptures is to obtain the best functional level for the patient without risking new injuries or degenerative changes in the knee.
Hip replacement surgery can be done either because of wear and tear or after an accident, such as a fracture of the femur. However, the more common of the two is surgery due to gradual wearing. One of the most common reasons for this is hip osteoarthritis. Hip replacement surgery involves replacing a broken joint with a new artificial joint. This means that new components are attached to both the hip and the femur. The details of the operation are always decided by the surgeon.
Knee replacement surgery is most often performed due to advanced knee osteoarthritis. In osteoarthritis, the joint loses more cartilage than is regenerated. The surface of the joint cartilage becomes damaged and can wear away, allowing the bones to rub against each other. The irritation causes inflammation of the joint lining, leading to swelling and stiffness. The body is unable to repair the damaged joint cartilage on its own. In knee replacement surgery, the worn-out surface is removed. Artificial joint surfaces are then placed on both the femur and tibia and secured with bone cement.
Torn meniscus There are two types of cartilage in the knee, articular and meniscal cartilage. These are crescent-shaped connective tissue discs that primarily function as shock absorbers. They are located between the tibia and the femur. Injuries to the meniscus usually occur due to twisting of the knee. However, the meniscus can also tear due to excess stress on the knee. The symptoms may not immediately appear after a knee sprain, but may come a few days later.

7 Reasons why Exercise Therapy will change Spine and Orthopedic care

Scientific evidence

Our unique variable resistance method was examined in the set of studies under the supervision of Professor Paavo Komi, comparing David to other methods and using EMG to validate the correctness of the loading curves and efficacy of training. Outcomes were very clear: the David variable principle was indeed optimal and had great fatiguing effect on muscles.

In conclusion, the present findings suggest that the repeated concentric contractions of the knee extensor muscles against the variable resistance may create optimal loading conditions that results in great fatiguing effects on the neuromuscular performance.

Häkkinen K, Kauhanen H, Komi PV. Effects of fatiguing loading with a variable resistance equipment on neural activation and force production of the knee extensor muscles. Electromyogr Clin Neurophysiol. 1988;28(2-3):79-87.

One study compared the David variable resistance against artificial (pneumatic) loading (HUR). The findings showed that with correct variable loading it is possible to provide higher fatiguing, which is essential in restoring the function of any joint.

The present study showed that, at least in untrained subjects, the weight stack device induced greater levels of peripheral fatigue during hypertrophic loading. It also led to large central fatigue during maximum strength loading and power loading.

Peltonen H, Häkkinen K, Avela J. Neuromuscular responses to different resistance loading protocols using pneumatic and weight stack devices. Journal of Electromyography and Kinesiology 2013;23(1):118-124.

Another study looked at variable vs. constant resistance in a leg press exercise and found out that the best training effect can be obtained with slightly increasing loading with a variable resistance method (used in David G210 Multifunctional Leg Press).

This study has demonstrated that the use of variable resistanceduring the leg press exercise can increase force and consequently EMG activity at larger knee angles during single repetition steady paced contractions.


Walker S, Peltonen H, Avela J, Häkkinen K. Kinetic and electromyographic analysis of single repetition constant and variable resistance leg press actions. Journal of Electromyography and Kinesiology 2011;21(2):262-269.

Scientific Evidence


Biomechanical engineering ensures safety, control and effectiveness. This means that optimally designed device can be utilized both in early stage rehabilitation as well as in high intensity elite athletes’ training.

Our Solution

Transforming musculoskeletal care

Download our Ebook