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Updated: Nov 29, 2025

The Lower Body Positive Pressure Treadmill for Knee Osteoarthritis Rehabilitation

The Lower Body Positive Pressure Treadmill for Knee Osteoarthritis Rehabilitation

Published on: July 22, 2019

Sequential changes in lower extremity function after total knee arthroplasty.

Masanori Tsubosaka^1,2, Hirotsugu Muratsu², Naoki Nakano¹

¹Department of Orthopaedic Surgery, 38303Kobe University Graduate School of Medicine, Kusunoki-cho, Chuo-ku, Kobe, Hyogo, Japan.

Journal of Orthopaedic Surgery (Hong Kong)

|November 24, 2020

Summary

Total knee arthroplasty (TKA) significantly improves walking and balance within 3 months. However, no further gains in these functions were observed beyond this 3-month period after surgery.

Keywords:

Timed Up and Go test ambulation function balance function standing time total knee arthroplasty

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Area of Science:

Orthopedics
Rehabilitation Medicine
Biomedical Engineering

Background:

Total knee arthroplasty (TKA) is a common procedure for knee osteoarthritis.
The impact of TKA on functional recovery, specifically ambulation and balance, requires detailed investigation.

Purpose of the Study:

To quantitatively assess the functional recovery of lower limb ambulation and balance post-TKA.
To evaluate changes in walking and standing balance at various time points after surgery.

Main Methods:

A cohort of 137 patients (osteoarthritis) undergoing primary TKA was studied.
Ambulation was measured using the 3m Timed Up and Go (TUG) test; balance was assessed via one-leg standing time (ST).
Functional assessments were conducted preoperatively and at 2 weeks, discharge, 3, 6, and 12 months postoperatively, analyzed with ANOVA.

Main Results:

Significant improvements in TUG test and ST were observed by 3 months post-TKA.
No further statistically significant improvements in ambulation or balance were noted between 3 and 12 months postoperatively.

Conclusions:

TKA effectively restores lower limb ambulation and balance, with maximal benefits achieved by 3 months.
Rehabilitation efforts should focus on achieving functional gains within the initial 3 months following TKA.