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Effectiveness of Kneehab in Strengthening the Quadriceps of Patients Post Anterior Cruciate Ligament (ACL) Reconstruction (NMES)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00737750
Recruitment Status : Completed
First Posted : August 20, 2008
Last Update Posted : August 28, 2008
Information provided by:
Bio-Medical Research, Ltd.

Brief Summary:

Prospective, controlled, randomized, single blind study in patients undergoing rehabilitation following anterior cruciate ligament reconstruction. 96 patients were randomly assigned to one of three groups. Group Group KH (Kneehab n=33)trained with a new type of garment integrated NMES for 20 minutes, 3 times per day, 5 days per week for 12 weeks; Group PS (Poli-Stim n=29) trained with standard neuromuscular electrical stimulation (NMES) for 20 minutes per day, 5 days per week for 12 weeks; Group CO (Control - n=34), which did not use muscle stimulation, performed voluntary isometric quadriceps muscle contractions. Patients receiving either form of NMES treatment were instructed to isometrically contract the quadriceps muscle voluntarily with each electrical muscle stimulation. All three groups superimposed this training schedule on the standard post-ACL reconstruction rehabilitation protocol used at the clinic.

The study design corresponded to a two-way variance analysis with three groups and 4 examination times (Baseline, 6 weeks, 12 weeks and 24 weeks post ACL reconstruction). The level of significance was set at 5%. The key indicators of the quadriceps muscle training intervention were the isokinetic strength development of the extensors of the injured leg at 90 degrees/second and 180 degrees/second and the distance achieved by participants performing the single-leg hop, the shuttle run. The target was to show a difference of 10% in the relative distance jumped for the single-leg hop and for the isokinetic strength tests and a 1.2 second difference in the time to complete the shuttle run. The target of 3 weeks was set for participants to achieve full weight-bearing capability with use of a walking aid. A comparison between the groups of the time for return to usual work activities was planned.

Condition or disease Intervention/treatment Phase
Anterior Cruciate Ligament Reconstruction Device: Kneehab Device: Poli-Stim Behavioral: Control Phase 3

Detailed Description:
Single center, prospective, controlled, randomized, single blind study in 96 patients following anterior crucial ligament (ACL)reconstruction to compare the effect of adding traditional NMES or garment-integrated NMES to a standard post-surgery rehabilitation program. In both cases the NMES was superimposed on isometric voluntary muscle contractions.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 131 participants
Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Single (Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Phase III Study in Patients Undergoing Rehabilitation Post-Surgical Reconstruction of the Anterior Cruciate Ligament (ACL)
Study Start Date : April 2005
Actual Primary Completion Date : October 2006
Actual Study Completion Date : October 2006

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: KH
Kneehab is a garment integrated NMES device with multipath technology.
Device: Kneehab
Program of NMES 3 times per day, five days per week for 12 weeks.
Other Name: Kneehab, neurotech

Active Comparator: PS
Poli-Stim, a standard NMES device, used for 3 times per day, five days per week for 12 weeks.
Device: Poli-Stim
Poli-Stim is standard NMES which the patients used for 20 minutes, 3 times per day, 5 days per week for 12 weeks.
Other Name: Poli-Stim, Neurotech

Active Comparator: CO
Control group performed voluntary muscle contractions for 20 minutes 3 times per day, 5 days per week for 12 weeks.
Behavioral: Control
Voluntary quadriceps muscle contractions.

Primary Outcome Measures :
  1. Isokinetic strength test of extension of the injured leg. Relative strength extension ratio (injured/uninjured). Distance of the jump achieved in the single leg hop and the time to achieve the shuttle run. [ Time Frame: 12 weeks Intervention + Outcomes at 24 Weeks ]

Secondary Outcome Measures :
  1. Strength test of flexors of the knee joint and 5 tests of coordination of proprioceptions (triple hop; side-step; carioca; timed hop and cross-over hop). [ Time Frame: 12 weeks Intervention + Outcomes at 24 weeks ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Persons who had surgical reconstruction of the anterior cruciate ligament
  • Persons with additional treatment of minor miniscal defects
  • Persons who were willing and able to provide Informed Consent

Exclusion Criteria:

  • Persons who had multi-ligament reconstruction
  • ACL patients with a microfracture or extra burden on the knee
  • Persons who registered pain above level 3 on the IKDC subjective evaluation pain scale questions, 3 days after surgery
  • Participants in a volunteer study within the previous ninety (90) days
  • Persons with serious cardiac arrhythmias or other implanted devices
  • Persons with cardiac pacemakers
  • Persons with neurological or psychiatric disorders
  • Persons who are pregnant or breastfeeding
  • Intake of drugs that interfere with the neuromuscular system
  • Persons with epilepsy
  • Any condition or history which in the opinion of the Principal Investigator might increase the risk to an individual or interfere with the evaluation of data

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00737750

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ATOS Clinic
Heidelberg, Germany, D-69115
Sponsors and Collaborators
Bio-Medical Research, Ltd.
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Principal Investigator: Hans H Paessler, FRCSed Centre for Knee and Foot Surgery Sports Traumatology, ATOS Clinic, Heidelberg, Germany

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Responsible Party: Prof. Hans H. Paessler, Centre for Knee and Foot Surgery, Sports Traumatology, ATOS Clinic Identifier: NCT00737750    
Other Study ID Numbers: BMR 04 2001A
First Posted: August 20, 2008    Key Record Dates
Last Update Posted: August 28, 2008
Last Verified: August 2008
Keywords provided by Bio-Medical Research, Ltd.:
Neuromuscular electrical stimulation (NMES)
Knee Surgery
Anterior cruciate ligament
Atrophy Prevention
Accelerated Recovery