FitBack individual report displays health-risk as traffic light: green (fit zone), yellow (improvement recommended zone), and red (improvement strongly recommended zone). These standards compare an individual's performance against an absolute criterion, which is a predefined standard associated with a specific health outcome.

References / Further reading

1. Ruiz, J. R., Castro-Piñero, J., Artero, E. G., Ortega, F. B., Sjöström, M., Suni, J., & Castillo, M. J. (2009). Predictive validity of health-related fitness in youth: a systematic review. British journal of sports medicine, 43(12), 909–923. DOI: 10.1136/bjsm.2008.056499

2. Ross, R., Blair, S. N., Arena, R., Church, T. S., Després, J. P., Franklin, B. A., Haskell, W. L., Kaminsky, L. A., Levine, B. D., Lavie, C. J., Myers, J., Niebauer, J., Sallis, R., Sawada, S. S., Sui, X., Wisløff, U., American Heart Association Physical Activity Committee of the Council on Lifestyle and Cardiometabolic Health, Council on Clinical Cardiology, Council on Epidemiology and Prevention, Council on Cardiovascular and Stroke Nursing, … Stroke Council (2016). Importance of Assessing Cardiorespiratory Fitness in Clinical Practice: A Case for Fitness as a Clinical Vital Sign: A Scientific Statement From the American Heart Association. Circulation, 134(24), e653–e699. DOI: 10.1161/CIR.0000000000000461

3. García-Hermoso, A., Ramírez-Vélez, R., García-Alonso, Y., Alonso-Martínez, A. M., & Izquierdo, M. (2020). Association of Cardiorespiratory Fitness Levels During Youth With Health Risk Later in Life: A Systematic Review and Meta-analysis. JAMA pediatrics, 174(10), 952–960. DOI: 10.1001/jamapediatrics.2020.2400