Cardiac Rehabilitation And Quality Of Life Scores

FITT Compliance Index (Rehab Adherence) Calculator

Clinical calculation support · Verify results before clinical use

Exercise prescription inputs

Enter the planned or observed exercise characteristics. This calculator does not compare completed activity against an individualized prescription.

FITTFramework

Enter 0–21 sessions per week.

Use a consistent scale appropriate to the patient's exercise prescription. This field is not a substitute for a clinically selected intensity target.

Enter 0–600 minutes per session.

Select the main exercise modality.

Reset calculator

About the FITT framework

FITT describes four elements of an exercise prescription: frequency, intensity, time (duration), and type. In cardiovascular rehabilitation, exercise should be individualized using clinical assessment, functional capacity, goals, and safety considerations. FITT describes the prescription framework; it is not, by itself, a validated adherence score.

What this calculator does

  • Collects frequency, subjective intensity, duration, and exercise type.
  • Calculates the legacy expression (frequency × intensity × time) ÷ 3, capped at 100, for transparency only.
  • Does not compare delivered exercise with prescribed targets, weight the exercise type, or establish a validated adherence percentage.

Recommended adherence assessment

For an adherence assessment, compare the sessions and exercise dose actually completed with the patient's individualized prescription over a defined period. Record missed sessions and reasons, and assess intensity and duration using the methods specified in the prescription. The metric and any threshold should be prespecified and validated for the intended use.

Clinical notes and references

Verdicchio C, Freene N, Hollings M, et al.

A Clinical Guide for Assessment and Prescription of Exercise and Physical Activity in Cardiac Rehabilitation. A CSANZ Position Statement.

Heart Lung Circ. 2023;32(9):1035–1048.

doi:10.1016/j.hlc.2023.06.854
Mezzani A, Hamm LF, Jones AM, et al.

Aerobic exercise intensity assessment and prescription in cardiovascular rehabilitation and beyond: a position statement from the EAPC.

Eur J Prev Cardiol. 2022;29(1):230–245.

European Journal of Preventive Cardiology
Clinical validation status

No supporting evidence was identified in the reviewed sources for the specific formula (F × I × T) ÷ 3, a cap of 100, or cutoffs of ≥70, 50–69, and <50 as a validated adherence instrument. These cutoffs have therefore been removed from clinical interpretation.

Clinical disclaimer: This tool is educational and does not replace an individualized cardiac rehabilitation prescription or clinical assessment. The displayed legacy index is unvalidated and must not guide treatment decisions. Exercise prescription in patients with cardiovascular disease should be individualized by appropriately qualified clinicians.
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