Active Isolated Stretching, or AIS, is an Aaron Mattes-associated system of repeated, brief stretches. The person actively initiates movement, with gentle assistance in assisted versions. Mattes’s teaching material specifies holds of no more than about two seconds. That convention identifies the approach; it does not establish a universally optimal stretch duration.
CLASSIFICATIONNamed active and assisted stretching system
REGIONContemporary United States-associated method; subsequently taught internationally.
HISTORYA 2012 interview documents Mattes’s account of developing and naming AIS during his professional career. The account supports modern attribution, while its efficacy and mechanism claims require separate evidence.
SESSION FORMATThe person actively moves through repeated stretches. A practitioner or a strap may provide limited assistance; assistance does not remove the need for pain limits and individual suitability.
How it is practiced
AIS is movement-led rather than a sustained pressure technique. Teaching materials describe isolating a target movement, repeating brief stretches and returning between repetitions. Assistance should remain gentle and responsive; a short hold does not make a painful or forceful movement appropriate.
An AIS exercise may be self-assisted or performed with another person. This distinction matters when reading research: a self-assisted exercise trial does not establish the effects of every practitioner-delivered AIS session. The school’s reflex and fascial explanations are proposed rationales, not established conclusions of this profile.
SESSION ARC
- 01Choose a suitable movement — Review the person’s goal, injury history and any restrictions before selecting an exercise.
- 02Use active participation — The person initiates the movement; assistance is agreed and limited, rather than imposed against pain.
- 03Reassess each repetition — Gentle movement and clear feedback guide whether to continue, change the exercise or stop. This overview does not prescribe a course or rehabilitation program.
Pressure
Movement; no pressure-depth classification
The record states this category without placing it on the depth scale.
History and origins
2012 interview
Massage & Bodywork published an interview presenting Aaron Mattes as the developer of AIS. Dates and developmental details in the interview are his retrospective account.[S9010]
DocumentedConfidence: High
Named-method teaching
Stretching USA describes the method’s brief holds and associates the approach with Aaron Mattes. This is first-party protocol description, not independent validation of its physiological explanations.[S9011]
Professional milestoneConfidence: Moderate
Safety and considerations
⚠ ABSOLUTE CONTRAINDICATIONS
—Stop a stretch that causes pain. A short hold is not permission to force range or continue through symptoms.[S9014]
SITE & PRESSURE CAUTIONS
—Keep movement gentle and controlled. General stretching advice supports avoiding bouncing and respecting pain; it does not prove the named AIS timing or reflex theory.[S9014]
POPULATION CONSIDERATIONS
—People with health conditions or injuries should discuss appropriate stretches with a health professional or physical therapist. This description provides no condition-specific rehabilitation or postoperative prescription.[S9014]
Evidence limits. A 2021 randomized trial abstract reports short-term soreness and function findings after a self-assisted wrist-flexor protocol in 60 healthy young adults, compared with no intervention. This narrow study does not establish superiority over other stretching, lasting effects, disease treatment or the outcomes of every assisted AIS session. Abstract-only access limits appraisal.
These cautions summarize professional guidance. They are not medical advice and do not replace pathology training, intake screening, referral, or required medical clearance.
REFERENCEReview pathology, contraindication, and referral guidance.EXPLORE →Training and professional context
TRAINING CONTEXTSPECIAL TRAINING
Method-specific instruction and movement competence
A practitioner needs appropriate anatomy, positioning, communication and assisted-movement skills. Mattes-associated teaching and private certification concern that training system. This page does not establish trademark ownership, current certification eligibility, CE acceptance or legal scope in any jurisdiction.
SCOPE
Whether this technique is within your scope depends on your profession, training, jurisdiction, and licensing board. Review the rules that apply where you practice.
Sources
S9010Aaron Mattes interview on Active Isolated Stretching — Active Balance. Jason Erickson, Aaron Mattes: Up Front with the founder of Active Isolated Stretching, Massage & Bodywork, September/October 2012, pp.74–81, preserved interview PDF. Mattes attribution and historical recollection only; disease and mechanistic claims are excluded. source S9011Stretching USA, Active Isolated Stretching — See source description and primary-source URL. Stretching USA, Active Isolated Stretching. Named-method teaching description and brief-hold convention; promotional fascial-restoration and reflex claims are not accepted as established mechanisms. source S9012Stretching USA, Active Isolated Stretching: Assisted DVD — See source description and primary-source URL. Stretching USA, Active Isolated Stretching: Assisted DVD. First-party description of client-led movement and gentle assistance; not a current credential standard or efficacy trial. source S9013Qamar et al., Effects of active isolated stretching on exercise-induced muscle damage in untrained subjects: a randomized controlled trial, JPMA 71(2A), 2021, pp.406–409, PMID33819216 — See source description and primary-source URL. Qamar et al., Effects of active isolated stretching on exercise-induced muscle damage in untrained subjects: a randomized controlled trial, JPMA 71(2A), 2021, pp.406–409, PMID33819216. Abstract-only review:60 healthy young adults; self-assisted protocol, wrist-flexor soreness, short follow-up, no active stretching comparator. source S9014Mayo Clinic, A guide to basic stretches, June18,2024, Stretching safely — See source description and primary-source URL. Mayo Clinic, A guide to basic stretches, June18,2024, Stretching safely. General advice on pain, gentle movement and individual guidance for conditions/injuries; its30-second static examples are not an AIS protocol. source