Stress relaxation is a gradual reduction in mechanical stress while deformation is maintained. It is one form of time-dependent tissue behaviour. The term does not mean psychological relaxation, and observing the phenomenon does not demonstrate healing or a lasting therapeutic effect.
Function and mechanism
In an experiment, tissue is brought to a particular deformation and held in that configuration. The force required to maintain it may decline over time. This differs from creep, where loading is maintained instead. Spinal tissues show complex responses influenced by their composition, hydration and the conditions of the experiment.
Assessment and interpretation
In practice, feeling less resistance during a held movement does not directly measure stress relaxation. Sensitivity, muscle activity and movement tolerance can change as well. Mechanical experiments therefore cannot independently identify the reason for symptom relief or determine the ideal duration of a particular technique for an individual patient.
Role of TAGMED care
At TAGMED, any intervention should respect tolerance and diagnosis-specific precautions. Stress relaxation does not justify maintaining a painful position or promising lasting tissue correction. Goals remain recovered activities and the response after treatment. A plausible mechanical explanation cannot substitute for evidence of practical benefit or appropriate assessment.
Follow-up and warning signs
A stretching sensation should not progress into persistent numbness or weakness. Stop the manoeuvre and request reassessment if this occurs. Rapid neurological deterioration requires urgent medical care rather than an attempt to obtain additional relaxation by holding the position longer.
Frequently asked questions
Does stress mean anxiety here?
No. It refers to mechanical stress in the language of material behaviour.
What remains fixed during the process?
Deformation is maintained while the stress needed to sustain it may decrease.
Is this identical to muscle relaxation?
No. A feeling of relaxation can reflect several distinct mechanisms.
Does lower resistance demonstrate repair?
No. A temporary mechanical change does not establish biological restoration.
Should stretching automatically be prolonged?
No. Duration and intensity should follow assessment and the individual's response.
Deformation is held constant; this diagram is not a stretching prescription.
Medical references
- Annals of Biomedical Engineering — Little and Khalsa. Human Lumbar Spine Creep during Cyclic and Static Flexion: Creep Rate, Biomechanics, and Facet Joint Capsule Strain.
- Journal of the Mechanical Behavior of Biomedical Materials. Axial Creep Loading and Unloaded Recovery of the Human Intervertebral Disc and the Effect of Degeneration.
References document the topic; their inclusion does not imply endorsement of TAGMED services by those organizations.
Educational information from The Spine Page. This entry does not replace an individual assessment. Documentary version: October 12, 2026. Sylvain Desforges, B.Sc., D.O., N.D., osteopath and naturopath.
TAGMED clinic contact details
For non-urgent consultations and information about available services.
Clinique TAGMED — Terrebonne
1150, rue Lévis, Suite 200
Terrebonne (Québec) J6W 5S6
450‑704‑4447
Clinique TAGMED — Montréal
1140, avenue Beaumont
Mont-Royal (Québec) H3P 3E5
1‑877‑672‑9060