This trial is active, not recruiting.

Condition achilles tendon pain
Treatment astym
Sponsor Emily Slaven, PT, PhD
Collaborator Performance Dynamics
Start date August 2013
End date August 2016
Trial size 50 participants
Trial identifier NCT01902433, ASTYM2013


The purpose of this study is to compare the changes in pain and self-perceived function between two different treatments for Achilles tendinopathy: the Astym® protocol (a form of soft tissue mobilization using instruments) and a specific exercise protocol that involves strengthening the calf and Achilles tendon. Astym® (A-stim) is not an acronym, but rather stands for "A Stimulation" of the body's healing response, describing the physiologic process which occurs with Astym treatment. Astym is the trademark name of a non-invasive treatment where instruments are applied topically to locate unhealthy soft tissue, and to transfer mild to moderate pressure to the underlying soft tissue structures. The aim of Astym treatment is to eliminate scar tissue and stimulate tissue regeneration. Both the principal investigator and co-investigator have been trained and certified in administering the Astym treatment. The specific exercise protocol will involve exercises that strengthen the Achilles and calf through eccentric exercise. Eccentric exercise is a form of exercise where the benefit comes from applying a controlled lengthening stress to the muscle and tendon.

United States No locations recruiting
Other Countries No locations recruiting

Study Design

Allocation randomized
Endpoint classification efficacy study
Intervention model parallel assignment
Masking single blind (outcomes assessor)
Primary purpose treatment
A form of soft tissue mobilization using instruments
(Active Comparator)
Eccentric exercise is a form of exercise where the benefit comes from applying a controlled lengthening stress to the muscle and tendon.

Primary Outcomes

time frame: 1 year

Secondary Outcomes

Numeric Pain Rating Scale
time frame: 1 year

Eligibility Criteria

Male or female participants from 20 years up to 60 years old.

Inclusion Criteria - Pain for 3 months or longer in the mid portion of only one Achilles tendon. - Must read, speak and understand English Exclusion Criteria - Previous surgery to the Achilles tendon that is currently painful - An injection into the Achilles tendon in the previous 4 weeks - Have symptoms in both Achilles tendons concurrently - Have taken fluoroquinolone antibiotics in the past 6 months

Additional Information

Official title Astym® Treatment Compared With Eccentric Exercise in the Management of Chronic Mid-substance Achilles Tendinopathy: A Multisite a Randomized Controlled Trial
Principal investigator Emily J Slaven, PhD
Trial information was received from ClinicalTrials.gov and was last updated in August 2016.
Information provided to ClinicalTrials.gov by University of Indianapolis.