Supraspinatus Tendon Acute Effects After Two Exercise Exposures: a Crossover Randomized Trial.

Part of paid clinical trials in Gainesville, Florida.

Sponsor
University of Florida
Study ID
NCT07489937
Status
Recruiting
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Conditions

  • Healthy Adult
  • Shoulder Pain

Eligibility Criteria

Sex
ALL
Age
18 Years - 45 Years
Healthy Volunteers
Accepted

Interventions

  • Isotonic exercise program — BEHAVIORAL
    Participants will perform two isotonic exercises, prone shoulder external rotation and shoulder elevation. The exercises will be performed at a pace of 2-second for both concentric and eccentric phases. For each exercise, participants will perform two sets of 8 repetitions, followed by a third set performed until fatigue. Fatigue will be determined using the Repetition in Reserve Scale, which asks the participant to perform exercises until they reach a self-selected number corresponding to the number of repetitions left that a participant could still complete if needed. We will ask participants to continue the third set until they reach a Repetition in Reserve number of 1. The rest period will be 30 seconds between sets and 2 minutes between exercises. The exercise load will be selected after manual maximal isometric strength testing using a handheld dynamometer. A 40% of the strength testing will be used for exercises in both groups following strength guidelines.
  • Plyometric exercise program — BEHAVIORAL
    Participants will perform two isotonic exercises, prone shoulder external rotation and shoulder elevation. The exercises will be performed at a pace of 1-second for the eccentric phases followed by an explosive concentric phase. For each exercise, participants will perform two sets of 8 repetitions, followed by a third set performed until fatigue. Fatigue will be determined using the Repetition in Reserve Scale, which asks the participant to perform exercises until they reach a self-selected number corresponding to the number of repetitions left that a participant could still complete if needed. Participants will complete the third set until they reach a Repetition in Reserve number of 1. The rest period will be 30 seconds between sets and 2 minutes between exercises. The exercise load will be selected after manual maximal isometric strength testing using a handheld dynamometer. A 40% of the strength testing will be used for exercises in both groups following strength guidelines.

Study Details

The purpose of this study is to understand acute tendon changes after two exercise programs. We will invite individuals with and without shoulder pain to participate in this study. Every individual will participate in both exercise programs separated by up to 15 days. The researcher will evaluate the shoulder tendon using ultrasound before each exercise program and at 1 hour, 6 hours and 24 hours after each exercise program. The researcher will also evaluate self reported pain, pain sensitivity testing, and self reported questionnaires. We will compare the tendon changes after each exercise program, as well as between participants with and without shoulder pain.

Key Dates

Start date
Apr 20, 2026
Status verified
Feb 2026
Primary completion
Apr 1, 2027
Completion
Apr 1, 2027

Study Design

Enrollment
24 participants (estimated)
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
OTHER

Arms

  • Experimental: Isotonic exercise then Plyometric exercise
  • Experimental: Plyometric exercise then Isotonic exercise

Primary Outcome Measure

Supraspinatus tendon thickness [ Time Frame: From enrollment to 1 hour, 6 hours, and 24 hours after each exercise program. ]

Central Contacts

Locations (1)

FacilityCityStateZIPSite coordinators
University of FloridaGainesvilleFlorida32610
Federico Pozzi, PT, MA, PhD
[email protected]
352-273-6957
Ignacio A Raguzzi, PT (PRINCIPAL_INVESTIGATOR)

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By research site
University of Florida· Gainesville, FL

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