Keep patients moving after discharge.
Rebound gives cleared patients recovering from a knee or Achilles injury a structured return-to-running plan that adapts to symptom reports, without adding work for your clinic.
Developed with biomedical engineering and DPT input, with a focus on graded progression, recovery, and long-term return to activity.
13 graded stages from walk/run intervals to 30 minutes continuous.
Upcoming sessions change from pain reports using fixed clinical rules.
Red flags pause the plan and direct the user back to professional care.
From walk/run intervals to continuous running
A 13-stage ladder is interleaved with strength work for the injured area: knee-targeted after a knee injury, calf strengthening after an Achilles injury. Every run begins and ends with a 5-minute walk.
Intake considers injury, surgical history, and current activity.
Advancement is capped at one stage per calendar week.
Ambition never sets the starting stage. Intake and symptom rules bound the plan; completed-session and next-morning reports shape what comes next.
A simple pain-monitoring model
The user reports joint, bone or tendon pain (0 to 10, with the site and side) and red flags before each run, after each session and the next morning. The morning reading is judged against that run's own pre-run reading at the same place, and a 3 to 5 tolerance applies only at the named injured place, the knee or the Achilles the user reported: pain elsewhere, a repaired Achilles rupture, and every unspecified or no-injury profile take the stricter rules.
Training continues; progression remains available.
At the named injured place (the knee, or the Achilles): a next-morning check against the run's pre-run reading. Raised, the plan holds or steps back. Elsewhere, or on a strict profile, it steps back at once.
Automatic regression. A reading of 6 or more before a run or the next morning, or pain raised again on the run after a regression, pauses the plan.
Eligibility and safeguards
- Designed for patients already cleared to be active
- Surgical history and time since procedure gate whether a plan can start
- Red flags pause training and direct the user to professional care
- Muscle soreness is distinguished from joint-pain scoring
Post-surgical floors the intake enforces before any plan is built:
- ACL reconstruction12 weeks minimum
- Meniscus repair16 weeks minimum
- Partial meniscectomy4 weeks minimum
- Achilles rupture repair16 weeks earliest; clearance and readiness required
Population minimums, not clearance. The surgeon's and therapist's guidance always outranks the app.
AI coaches. Rules decide.
AI can personalize coaching notes, strength emphasis, and explanations. It does not make progression or safety decisions. Those come from the rules engine, and the program can run without AI.
Built for the gap after PT
Rebound is a mobile web app, not a diagnostic or treatment tool. Patients can use it without clinic integration or an app-store install. Nothing to set up on your side.
A patient may ask you to sign a letter.
For a patient using Rebound after a knee or Achilles injury, HSA or FSA reimbursement may be available if the program is recommended for that injury and the administrator approves it. Other injury-related expenses may also qualify, although Rebound currently offers an injury intake and letter template only for knee injuries, Achilles tendinopathy and a surgically repaired Achilles rupture; the tendinopathy letter states the condition as the patient reported it, for your review. Here is how the Rebound letter process works.
The patient requests it
At the patient's request, Rebound prepares a letter template on the web with the patient's own details filled in.
You review it
The patient brings it to you. You may edit it, sign it, or decline. Rebound never contacts you on a patient's behalf and never pre-fills your name.
The administrator decides
The patient submits the signed letter with an itemized receipt. Reimbursement is the HSA or FSA administrator's decision alone.
Rebound Running LLC has no financial relationship with any signing provider and makes no medical determinations.
The one-page clinician overview
A single Letter-size page with the ladder, the pain model, eligibility and a patient-access QR code, for the break room or a referral folder.
Download the PDFWe want clinician feedback
If the progression or decision rules conflict with how you would manage a patient, we want to hear it. Full stage tables, decision rules, and evidence notes are available on request.
Send feedbackRebound is a fitness and wellness product. It does not provide medical advice, diagnosis, or treatment, and it is not a substitute for evaluation or care from a qualified professional. Users are prompted to seek professional care whenever symptom reports warrant it.
Pilot Rebound with your patients.
Free during early access. No clinic integration, nothing to install, and a two-minute preview of what your patient will see.