Clinical benefits with Happylegs: New Medical Study

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Clinical benefits in patients with peripheral cardiovascular or vascular pathology receiving treatment with

Happylegs, the seated walking machine. 


There is no doubt that lifestyle and factors known as hygienic-dietetic measures play an important part in treating vascular diseases, along with pharmacological treatment.
As Dr Valentín Fuster recently postulated, the relinquishing of healthy lifestyles is related to an increase in cardiovascular disease and its consequences.
Physical support systems such as the one designed in Happylegs bring benefits due to the importance of preventing sedentary lifestyles. This is not only the case in people with impaired physical mobility, but also in young people who have no time to walk every day.
The interest of our study is focused on the objective documenting of the benefits of systems such as the one developed by Happylegs. This is in accordance with three fundamental sections based on diagnosis and clinical observation. Firstly, the benefits related to blood pressure and all aspects that are connected with cardiovascular protection, evaluating the ABI (ankle-brachial index) which demonstrates the close correlation with vascular risk before and after expose to the Happylegs system.
Secondly, the benefits for the peripheral return circulation, evaluating the symptoms of venous stasis, such as the leg perimeter before and after using Happylegs. Thirdly, an evaluation of the benefits on the locomotor system following treatment with Happylegs in the ankle and knee joints, assessed using a visual pain scale and mobility response.
This study is designed as a pilot study, in the secret hope that it will serve as a basis for more important studies, with a view to objectifying and publishing the benefits of using a therapy such as the one proposed with the Happylegs system.


This is a prospective clinical study for observing the benefits obtained in patients receiving regular passive exercise as opposed to patients receiving the habitual treatment. There will be no pharmacological intervention in either group other than the guided intervention indicated for their pathologies. Furthermore, they will receive the same information regarding treatment based on lifestyle, and in particular, how to avoid sedentary habits.
The patients included in the study will be requested to give their informed consent and their participation or non-participation will in no case lead to any reduction in assistance in normal medical practice conditions.
The first three patients visiting the surgery on odd days with symptoms related to cardiovascular problems, peripheral vascular problems or locomotor system problems in the ankle or knee joint will start a programme of exposure to passive exercise with the Happylegs equipment. On the other hand, those patients visiting the surgery on even days will form the control group.
It would be desirable for the sample estimated in this pilot study to be 20 patients in each of the three pathological categories in the group of patients receiving passive exercise support, and the same number in the controls.


_Ankle-brachial arterial pressure index
_Doppler arterial ultrasound
_Quality of life survey
_Recording of adverse events
_Glucose levels in diabetics


_Doppler venous ultrasound
_Leg perimeter
_Quality of life survey
_Glucose levels in diabetics


_Ankle and knee perimeter
_Quality of life survey
_Glucose levels in diabetics


_Six months with clinical evaluation at the start and end of the observation period.
_60-minute treatment sessions three days a week during the observation period.


After the first part of the observation period, the clinical benefits are recorded for patients being treated with the Happylegs system, and at an earlier stage in different patient types.

Firstly, patients with a history of peripheral venous insufficiency, with or without a history of prior thrombophlebitis, mentioned an improvement in the symptoms linked with the process in the quality of life survey, such as tired legs, a tingling sensation in the legs and a considerable reduction in inflammation with respect to the ankles and in the calf muscles. This is corroborated by the measurements taken of the leg perimeter before and after this first treatment period.

The second group of patients showing benefits were diabetics, and in particular, those with limited mobility, since their glucose levels before and after the treatment period fell by 6.5% despite being in the initial observation phase.
Likewise, reductions in arterial pressure were observed in treated patients, as well as an improvement in the ankle-brachial pressure index.

With respect to patients with problems in the knee joint, there was improvement in mobility and a reduction in the perception of pain by the patient.
The data contributed by these first results demonstrates the clinical relevance in terms of the favourable evolution of patients receiving treatment compared to those receiving no treatment. It is to be expected that this improvement will increase as the patients’ exposure period progresses.

It can thus be concluded that the use of the Happylegs system brings about an improvement in the treatment received by the patients, and therefore an improvement in the evolutionary prognosis of those patients should be expected.



Patients receiving active treatment with the Happylegs showed an average reduction in glucose levels of 15% with respect to the baseline parameters after the observation and treatment period, compared with patients receiving only hygienic and dietetic advice and habitual medical treatment.

There is no doubt that this reduction could be greater if there is an increase in the daily period of use of the system over that implemented during the study, for logistical and methodological reasons. The necessary medical treatment could even be corrected for diabetes mellitus with the ensuing economic savings in drugs.

Passive mobilisation with the Happylegs system achieves an increase in glucose consumption by the muscles of the lower limbs, which is consolidated by the increase in the outgoing and returning blood flow activated during treatment.


The ankle-brachial index is a diagnostic tool used to evaluate the blood circulation to the lower extremities. This parameter compares the systolic ankle artery pressure (in the posterior tibial artery and dorsalis pedis artery) to that of the brachial arteries (humeral arteries).

The ankle-brachial index is a widely-used tool for the non-invasive evaluation of peripheral vascular disease. Studies have shown that ABI Sensitivity (epidemiology) is 90% with a Specificity (epidemiology) of 98% in detecting haemodynamically significant stenosis (serious) >50% in the large arteries of the lower limbs, defined by angiography.

Value obtained
> 1.2
1.0 - 1.2
0.9 - 1.0
0.8 - 0.9
Arterial disease
0.5 - 0.8
Moderate arterial disease. Claudication may develop with values below 0.6.[]
< 0.5
Severe arterial disease, rest pain if  <0.25. []

In the group of patients using the Happylegs system, there was an increase in the ankle-brachial index, indicating an improvement, especially in the arterial flow of the lower extremities and consequently a reduction in global vascular risk.

Likewise, an improvement is expected in the behaviour of glucose levels and the stabilisation of arterial pressure values as the time of exposure to the equipment is increased.


The benefit of active mobility (both active mobilisation and passive mobilisation of the lower limbs) on the venous return circulation is already well known. Therefore the behaviour of patients using the Happylegs system was predictable in this respect.

We used several systems to evaluate the efficacy of the physical therapy treatment provided through the tested system. Firstly, the visual comfort scale of between 1 and 10, which the patients had to complete before starting, halfway through the observation period and at the end of that period. An evaluation was made of the heavy sensation, numbness or tingling and pain in feet, ankles and legs. An improvement was observed in all the parameters of the symptoms related to venous stasis in people with poor return circulation.

In this respect, a difference should be established between patients maintaining autonomy with respect to mobility and patients with impaired mobility due to all manner of processes, especially those affecting the locomotor system. In these patients, in which the perception of wellbeing was greater, since their disability was vastly improved by the passive mobilisation of the Happylegs system and in a similar way to the above cases, it is to be expected that the longer the exposure to the system, the greater the level of wellbeing.

In patients mentioning or presenting a history of phlebitis or thrombophlebitis in the calf area, the leg perimeter was measured with a tape measure and at the end of the exposure period, the average reduction obtained was 9% less than during the initial baseline phase.

It can be concluded that both therapeutic aspects and preventive aspects intervene with respect to peripheral venous disease in the lower extremities with the continuous use of the Happylegs system.


Patients with a documented history of arthrosis in the knee and ankle joints were evaluated.
Patients who, apart from receiving hygienic and dietary advice and the habitual medical treatment, received treatment with Happylegs showed a significant improvement in quality of life and in visual pain scale, with an improvement in functional joint capacity being perceived, especially in the knees. Likewise there was a reduction in the joint perimeter in the knees at the level of the intrameniscal ligament and in the ankle at the level of the perimeter between the lateral and medial malleolus.

The explanation of these clinical changes is two-pronged.  Firstly, the mechanical aspect due to the passive mobility of the joint and thus the benefit on the joint capsule, and the synovial fluid flow within the joint. And secondly, the obvious benefit of stimulating the return and outgoing flows in the limb, as the cells and proteins for joint repair are supplied by the bloodstream. So much so, that during the 1980s, Soviet traumatology was responsible for designing the functional plaster for reducing movement in fracture zones as, if there was joint mobility above and below it, recovery was much faster and the only explanation for this lay in the bloodstream which provided the necessary instruments for recovery and in certain cases, cure.


In the light of the evolution of the different patients observed in this study, including those not using the Happylegs system and those receiving this therapy, we can conclude that regular, continuous use of passive  systems for mobilising the lower extremities and in particular, the Happylegs system, generate an improvement in different variables in the people using them, with no side-effects of any kind or risk in use, given that during the study, no harmful effects with respect to the patients were reported or observed. 

The explanation for the patient improvement phenomena observed in the different fields apart from the placebo effect lies in the activation of the blood circulation brought about by the Happylegs system in the people using it.  There is no doubt that the constant and continued use of the system for several hours on a daily basis produces an increase in the improvement and a favourable evolution of the lesions.

We cannot rule out the possibility of this circulatory activation having a positive influence on other pathologies of the body, apart from those analysed in greater depth in our study.

In fact, testimonies by patients about improvements in cognitive abilities and in general organic functionality, including greater personal autonomy, have presented us with the challenge of continuing our studies beyond the lower extremities and extending them to the cognitive and emotional behaviour of patients with  cognitive deterioration and early signs of dementia and, in particular, those of vascular origin.

Zaragoza, April 2015
Dr Javier Tisaire Sánchez
Clinical Research Area Coordinator
FUNDSALUD Health Foundation
Medicine, Science and Society

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