The device movement is a safe and effective exercise for the knee joint, targeting the flexor muscles. The exercise is performed in a comfortable seated position. The range of loading accommodates early rehabilitation as well as strength training.
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 a great fatiguing effect on muscles.
Knee Flexion
The device movement is a safe and effective exercise for the knee joint, targeting the flexor muscles. The exercise is performed in a comfortable seated position. Range of loading accommodates early rehabilitation as well as strength training.
Automatic back support adjustment (electronic version)
Self adjusting ankle cushions
Range of motion adjustment (RMA) to accommodate various users
Easy entry / exit
Seat belt for additional stability during exercise
Training with one or two legs
Suitable for both rehabilitation and sports training
Scientifically validated resistance curve
EVE integration with strength and mobility tests
Weight stack: 2,5/50 kg + 5/100 kg = 150 kg
Target muscles
Gluteus Maximus
Biceps Femoris
Semimembranosus
Semitendinosus
Certification -
Medical-CE device, class 1M
Adjustments -
Seat back adjustment: automatic (electronic), 1-11 gradual (manual)
Ankle cushion adjustment: self adjusting
Knee support: 1-5 gradual
Isometric torque measurement points -
30°, 60° and 90°