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Pilot Investigation to Evaluate Effectiveness of Shockwave Therapy, Photobiomodulation and Physical Therapy in the Management of Non-insertional Achilles Tendinopathy

Pilot Investigation to Evaluate Effectiveness of Shockwave Therapy, a Combination of Shockwave Therapy and Photobiomodulation and Physical Therapy in the Management of Non-insertional Achilles Tendinopathy: A Randomized Control Trial With Elective Cross-Over Design

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04725513
Enrollment
46
Registered
2021-01-26
Start date
2022-08-29
Completion date
2024-10-01
Last updated
2026-01-12

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Achilles Tendinopathy

Brief summary

This is a randomized control trial with an elective cross over after three months to evaluate three different treatments in the management of non-insertional Achilles Tendinopathy. The treatment methods include physical therapy, shockwave therapy and photobiomodulation.

Detailed description

This is a randomized control study with an elective cross over. In part 1 of the study participants will be randomized into one of three treatment arms: 1) physical therapy only; 2) physical therapy and shockwave therapy; 3) physical therapy, shockwave therapy and photobiomodulation. At 3 months, patients can choose to switch to a different treatment arm than they were initially randomized.

Interventions

DEVICEShockwave Therapy

Participants will receive shockwave therapy once a week for three weeks

DEVICEPhotobiomodulation Therapy

Participants will receive photobiomodulation therapy twice a week for three weeks

OTHERPhysical Therapy

Participants will enroll in physical therapy and complete an at-home exercise protocol

Sponsors

Spaulding Rehabilitation Hospital
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

The first part of the study is a randomized control trial, the second part is an elective cross over

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

* A diagnosis of mid-portion Achilles tendinopathy (including both unilateral and bilateral) * Running is the pre-injury primary form of physical activity and pre-injury would complete on average 10 miles per week or more of running * VISA-A \<80 at baseline to be eligible

Exclusion criteria

* Less than 3 months of symptoms * Primary insertional Achilles tendinopathy * Diagnosis of rheumatological disease/connective tissue condition, symptomatic arthritis of foot and ankle, a primary running related injury outside Achilles tendinopathy, other contraindications to PBMT or SWT * Have received SWT within the past 3 months to their Achilles * Prior injection within 3 months * Currently enrolled in PT for more than 4 weeks for their condition * Women who are pregnant. * known history of Achilles tendon tear * currently taking oral steroid or fluoroquinolone class of antibiotics

Design outcomes

Primary

MeasureTime frameDescription
Calf Raises Performed to Fatigue and Inability to ContinueDifference from 0-3 monthsCalf raises performed to fatigue and inability to continue
Ultrasound Measurements in Change of Cross Sectional AreaDifference from 0-3 monthsChanges in the cross-sectional area measured on ultrasound
Victorian Institute of Sports Assessment (VISA-A) Questionnairechange from baseline to 3 month follow-up measureVictorian Institute of Sports Assessment Questionnaire. The score of the questionnaire ranges from 0-100, where 100 is a person who is completely asymptomatic (better).

Countries

United States

Participant flow

Recruitment details

Target enrollment was 60 participants randomly assigned equally to three groups. No power calculations were used to determine sample size as no comparable studies were identified to estimate effects of RPW. Eligible participants were runners aged 18-65 with primary running-related injury diagnosed as unilateral or bilateral non-insertional AT and symptoms exceeding 3 months. Each reported running as their primary sport, with weekly volume \>16 km.

Pre-assignment details

After screening and obtaining written informed consent, participants who enrolled were assigned, using block randomisation design, o one of three conditions: EXER; EXER and RPW; or EXER, RPW and PBMT. After 3 months, participants could elect to participate for three additional months using a different treatment than initially prescribed (EXER +RPW or EXER + RPW + PBMT) or could continue EXER and complete a 6-month follow-up visit.

Participants by arm

ArmCount
Physical Therapy Only15
Shockwave Therapy and Physical Therapy12
Photobiomodulation, Shockwave Therapy and Physical Therapy15
Total42

Baseline characteristics

CharacteristicPhysical Therapy OnlyShockwave Therapy and Physical TherapyPhotobiomodulation, Shockwave Therapy and Physical TherapyTotal
Age, Continuous37 years
STANDARD_DEVIATION 10
42 years
STANDARD_DEVIATION 13
42 years
STANDARD_DEVIATION 14
40 years
STANDARD_DEVIATION 13
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
3 Participants0 Participants1 Participants4 Participants
Race (NIH/OMB)
Black or African American
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
12 Participants12 Participants14 Participants38 Participants
Sex: Female, Male
Female
10 Participants6 Participants7 Participants23 Participants
Sex: Female, Male
Male
5 Participants6 Participants8 Participants19 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
0 / 160 / 140 / 16
other
Total, other adverse events
10 / 1610 / 149 / 16
serious
Total, serious adverse events
0 / 160 / 140 / 16

Outcome results

Primary

Calf Raises Performed to Fatigue and Inability to Continue

Calf raises performed to fatigue and inability to continue

Time frame: Difference from 0-3 months

ArmMeasureValue (MEAN)Dispersion
Physical Therapy OnlyCalf Raises Performed to Fatigue and Inability to Continue3 Calf raisesStandard Deviation 6
Shockwave Therapy and Physical TherapyCalf Raises Performed to Fatigue and Inability to Continue8 Calf raisesStandard Deviation 13
Photobiomodulation, Shockwave Therapy and Physical TherapyCalf Raises Performed to Fatigue and Inability to Continue5 Calf raisesStandard Deviation 11
Primary

Ultrasound Measurements in Change of Cross Sectional Area

Changes in the cross-sectional area measured on ultrasound

Time frame: Difference from 0-3 months

ArmMeasureValue (MEAN)Dispersion
Physical Therapy OnlyUltrasound Measurements in Change of Cross Sectional Area-0.03 cross sectional area of tendon in mm^2Standard Deviation 0.14
Shockwave Therapy and Physical TherapyUltrasound Measurements in Change of Cross Sectional Area-0.05 cross sectional area of tendon in mm^2Standard Deviation 0.06
Photobiomodulation, Shockwave Therapy and Physical TherapyUltrasound Measurements in Change of Cross Sectional Area-0.03 cross sectional area of tendon in mm^2Standard Deviation 0.15
Primary

Victorian Institute of Sports Assessment (VISA-A) Questionnaire

Victorian Institute of Sports Assessment Questionnaire. The score of the questionnaire ranges from 0-100, where 100 is a person who is completely asymptomatic (better).

Time frame: change from baseline to 3 month follow-up measure

ArmMeasureValue (MEAN)Dispersion
Physical Therapy OnlyVictorian Institute of Sports Assessment (VISA-A) Questionnaire18 VISA-A units on a scaleStandard Deviation 17
Shockwave Therapy and Physical TherapyVictorian Institute of Sports Assessment (VISA-A) Questionnaire33 VISA-A units on a scaleStandard Deviation 15
Photobiomodulation, Shockwave Therapy and Physical TherapyVictorian Institute of Sports Assessment (VISA-A) Questionnaire25 VISA-A units on a scaleStandard Deviation 40

Source: ClinicalTrials.gov · Data processed: Feb 11, 2026