Total Knee Arthroplasty

One Patients Story to Treatment and Recovery

““The AlterG is a vital piece of equipment when assisting in the rehabilitation of those with a weight bearing restriction or joint pain from arthritis. We are able to help our patients walk in a safe, controlled, and pain-free environment.” ”

Stephanie Frager, Therapy Director, Southlake Village Rehabilitation and Care Center

One Patients Recovery from a Total Knee Arthroplasty

Caroline B. Palmer, MSPT, OCS, CSCS


65 year-old active female with long history of left knee pain from osteoarthritis that was progressively becoming worse and limiting her activity level. She underwent elective left total knee arthroplasty. Prior to surgery the patient was doing aquatic exercises 3x/week and working out with a personal trainer for upper body strengthening 2x/week.


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  • Increase left knee ROM to functional levels to assist with gait, ADL’s
  • Tolerate standing to participate in ADL’s
  • Tolerate ambulating x 20’ on level surfaces without an assistive device
  • Tolerate ambulating up/down 3 steps
  • Tolerate squatting to knee high surfaces

History / Progression

  • The patient had long history of left knee osteoarthritis and pain which was getting worse and limiting daily activity.
  • Developed increased left knee pain after a fall 2 years ago.
  • Consulted with MD and had a course of physical therapy which provided relief for approximately a year. When symptoms increased and icing and exercises did not provide relief the patient elected to undergo left total knee arthroplasty.
  • She underwent 3 days of inpatient care, followed by 5 days of inpatient rehabilitation, then started outpatient rehabilitation.
  • She initially had significant pain and stiffness in the left knee, especially medially. At initial evaluation the patient’s left knee PROM was: flexion = 93 degrees, extension= -3 degrees. The patient was ambulating with a front wheeled walker.
  • 18 days post-op, the patient initiated a walking rehabilitation program on the AlterG Anti-Gravity Treadmill at 50% of her body weight at 2.0 mph and no incline.
  • The protocol included gait training (on the AlterG), soft tissue mobilization, stretching, strengthening for the core and left lower extremity, and proprioception drills.
  • Program duration was 6 weeks.


Any increase in symptoms were considered when progressing ambulation on the AlterG. Speed, and body weight were increased as patient’s pain level improved.

Download Case Study to see progression table.


The patient was seen 2x/wk x 6 weeks. The patient started with increased left knee pain and stiffness that was monitored during her rehab. The patient did achieve all of her goals and has returned back to an exercise program and walking with her husband after dinner.

The AlterG Anti-Gravity Treadmill was incorporated early in the rehabilitation program as a way to restore her normal gait and increase her confidence when ambulating without an assistive device. The AlterG Anti-Gravity Treadmill also allowed the patient to progress in a safe environment and by unweighting her, she was symptom-free during her gait training sessions. The patient walked on the AlterG 2x/week and progressed her time, speed and increased her body weight to focus on returning to ambulating unassisted.

The patient was discharged after 2.5 postoperative months. She was able to return to ambulating outside on varying terrain up to 40 minutes in duration and joined a gym to continue with an exercise program.