Introduction: Lumbar spinal stenosis is constriction of the lumbar spinal canal, which can cause the spinal cord and / or nerve roots to cramp. It is a chronic condition with several years of non-specific lower back pain and can later lead to a progressive deterioration with transient episodes of severe back pain and pain along the lower limbs. Purpose: The purpose is to determine which physical movement tests and functions are valid and reliable for assessing the capacities of people with stenosis of the spinal canal. Methods: A descriptive method of research was used. Professional and scientific literature was reviewed in Medline, PubMed, ScienceDirect and The Spine Journal. Results: The track belt test shows a high level of short-term reliability with a low degree of inconsistency. A good correlation is between the predicted walking distance and the Self-Paced Walking Test, where the patient is walking until the symptoms are stop him. We get the most valid correlation in the Oswestry Disability Index questionnaire - the walking category and self-assessment of the distance traveled with validity. Discussion and conclusion: Walking is the main indication of functional status of patients with lumbar spinal stenosis, so pre-prepared specific questionnaires that acess a certain feature are used. The most used questionnaires are Physical Function Scale and Oswestry Disability Index. The Physical Function Scale questionnaire is intended to assess the functional status of patients with lumbar spinal stenosis, while the Oswestry Disability Index questionnaire is used to assess the pain in the lower back or to assess the categories within the questionnaire. The most valid and reproducible measurements are the Oswestry Disability Index, a walk on a running carpet and a Physical Function Scale walking category.