Impact of Exercise Access on Physio Outcomes Post Knee Replacement

NCT07502040 | Not Yet Recruiting

• 2 other identifiers: HullUTHIRAS 345128
• Study Type: interventional
• Target: 40
• Locations: 0 countries
• Sites: N/A

Brief Summary

To stay strong, patients should do some strength training at least twice a week. However arthritic pain can limit walking and activity. The wait for knee surgery can be long, which can lead to loss of muscle strength. Patients who need a new knee joint tend to be older. If older people do not exercise and become weak, they tire easily, and may take longer to recover after surgery. Patients recover faster after having a new knee joint if their leg muscles are strong. This is why exercise before surgery can help people to make the most of their new joint. Patients come to a joint school where the investigators show them exercises and advise how to get ready for surgery. Patients are given a sheet of pictures and prompts for each exercise but the investigators know that some people don't do the exercises that they are given. Exercises are more likely to be done if they are fun, if people can see they make a difference, if they know what to do, and if their physiotherapist can check what they are doing.

Conditions

Knee Arthroplasty, Total

Keywords

Arthroplasty; Exercise; Prehabilitation; Motion-tracking; Digital App; Artificial intelligence

Outcome Measures

Primary Outcomes (2)

• Length of stay in hospital

  Number of hours between time of surgery and time of discharge

  From time of surgery to the time of discharge from hospital, up to 52 weeks.

• Number of post operative physiotherapy contacts

  This measure is a count of the number of times that the participant has a documented contact with a physiotherapist after surgery. This may be in person or via telephone or video call, and may take place in hospital or after discharge from hospital after surgery.

  From operation to 6 weeks post operation, up to 52 weeks.

Secondary Outcomes (3)

• Oxford knee scale

  From enrolment to six weeks post surgery

• EQ5DL- a health-related quality of life tool.

  From enrolment to six weeks post surgery, up to 52 weeks.

• Visual analogue scale

  From enrolment to six weeks post surgery

Study Arms (2)

Kemtai Digital App

EXPERIMENTAL

A randomised group of twenty patients will be granted access to the Kemtai digital App (the experimental arm) which provides an identical exercise prescription to the comparator (NHS standard of care intervention) but supports the patient through the exercise with tracking and real time (via AI) advice on corrective exercise techniques.

Device: Kemtai Digital App

NHS Standard of Care

ACTIVE COMPARATOR

A randomised group of twenty patients will be provided the NHS standard of care which is a paper based handout illustrating the exercises and the prescription to be done before and after surgery.

Behavioral: NHS standard care

Interventions

Kemtai Digital App DEVICE

This group will be granted access to the Kemtai digital App (the experimental device intervention) which provides an identical exercise prescription to the comparator intervention but supports the patient through the exercise with tracking and real time (mediated via AI) advice on corrective exercise techniques.

Kemtai Digital App

NHS standard care BEHAVIORAL

This group will be provided the NHS standard of care which is a paper based handout illustrating the exercises and the prescription to be done before and after surgery.

NHS Standard of Care

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Adults aged ≥18 years.
• Referred to Hull University Teaching Hospitals NHS Trust t for Knee Arthroplasty at either Castle Hill Hospital or Goole District Hospital and has access to pre operative resources offered by the joint school physiotherapists.
• Has access to a device which is compatible with the operational requirements of the Kemtai programme.
• Able to give informed consent.

You may not qualify if:

• Significant comorbid physical or mental illness considered by the investigator to either: prevent engagement in modified exercise; impair the participants ability to follow instructions place the participant at undue risk during exercise training adversely affect the recovery or rehabilitation trajectory
• Patients already involved in an exercise or rehabilitation study will be excluded from this study.
• Unwilling or unable to consent or complete study measures.
• Has insufficient understanding of English or the languages that are supported by the Kemtai programme and does not have someone who can translate.
• Is a prisoner
• Has had a total hip replacement within the previous 6 months.
• Is attending for revision of a previous knee replacement
• Is having a knee replacement due to a tumour
• Lacks visual acuity sufficient to follow stimuli on monitor or has someone who can give necessary verbal prompts
• Severe genu varum or genu valgum deformity which precludes the ability to exercise using the Kemtai programme.

Sponsors & Collaborators

• Hull University Teaching Hospitals NHS Trust: lead

MeSH Terms

Conditions

Motor Activity

Condition Hierarchy (Ancestors)

Behavior

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: SUPPORTIVE CARE
• Intervention Model: PARALLEL
• Sponsor Type: OTHER GOV
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: February 24, 2026
• First Posted: March 30, 2026
• Study Start: March 31, 2026
• Primary Completion (Estimated): September 30, 2026
• Study Completion (Estimated): November 28, 2026
• Last Updated: March 30, 2026

Record last verified: 2025-08

Data Sharing

• IPD Sharing: Will share