Pilot study of methods to document quantity and variation of independent patient exercise and activity after total knee arthroplasty

UMMS Affiliation

Department of Orthopedics and Physical Rehabilitation; Department of Medicine, Division of Preventive and Behavioral Medicine; Senior Scholars Program

Publication Date


Document Type



Aged; Arthroplasty, Replacement, Knee; Documentation; Exercise Therapy; Female; Humans; Male; Monitoring, Ambulatory; Motor Activity; *Patient Compliance; Pilot Projects; *Recovery of Function; Self Disclosure; Treatment Outcome; Walking


Orthopedics | Rehabilitation and Therapy | Women's Studies


Variation in patients' independent exercise and activity after total knee arthroplasty (TKA) surgery may contribute to variable functional gains but have never been quantified. We pilot tested daily exercise logs and step activity monitors to quantify exercise and general home activity post-TKA. Patients successfully maintained logs and wore activity monitors. Logs documented significant variation in quantity of daily exercises. Women with poor emotional health recorded fewer repetitions and greater variation. More daily exercise repetitions correlated with larger 6-month functional improvement. Activity peaks on step monitors correlated with logged exercise sessions. However, most step activity was in addition to exercise sessions. Further research is needed to validate these findings and to clarify the relationship among post-TKA exercise, activity, and functional gain.

DOI of Published Version



J Arthroplasty. 2006 Sep;21(6 Suppl 2):157-63. Link to article on publisher’s site

Journal/Book/Conference Title

The Journal of arthroplasty


Medical student Joseph McLaughlin participated in this study as part of the Senior Scholars research program.

Related Resources

Link to article in PubMed

PubMed ID