Sleeper Stretch in CrossFit Participants

NCT06720155 | Completed

• 1 other identifier: 24-007771
• Study Type: interventional
• Target: 26
• Locations: 1 country
• Sites: 2

Brief Summary

The purpose of this study is to compare the efficacy of the sleeper stretch in improving shoulder range of motion, strength and upper body performance in CrossFit athletes.

Conditions

Shoulder Pain

Keywords

CrossFit; Sleeper stretch

Outcome Measures

Primary Outcomes (1)

• Upper body function

  Measured by isometric horizontal push test (IHPT), a newly designed test that selectively measures the horizontal component of maximal isometric force, with 3 minutes of rest between each trial. The participants will place their hands on force platforms that sample ground reaction force data at 1000 Hz throughout the test.

  Baseline, 4 weeks, 8 weeks

Study Arms (2)

Sleeper Stretch

EXPERIMENTAL

Behavioral: Sleeper stretch

Control Group

ACTIVE COMPARATOR

Behavioral: Standard workout

Interventions

Sleeper stretch BEHAVIORAL

Participants will complete their regularly scheduled workout activities over 8 weeks, with the addition of the sleeper stretch into the dynamic warm-up. Participants will be instructed to lie side-lying with the dominant arm downward, the trunk rotated posteriorly 20 to 30°, the shoulder raised to 90°, the elbow flexed to 90°, and both knees semi-flexed to ensure stability. Participants will then be asked to use the opposite hand to grasp the dominant hand below the wrist and gradually internally rotate the forearm towards the floor; (i.e., the participant will perform passive internal rotation with the opposite arm). This stretch position will be completed on both sides. Participants will be instructed to complete 2 sets of 10 repetitions for each arm and hold the position for \~2 seconds.

Sleeper Stretch

Standard workout BEHAVIORAL

Participants will complete their regularly programmed dynamic warm-ups before scheduled workout for 8 weeks.

Control Group

Eligibility Criteria

• Age: 18 Years - 55 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Regularly active (attending CrossFit \> 2x per week)

You may not qualify if:

• Positive test for labral lesions or rotator cuff tears
• History of recent fracture
• Orthopedic surgery in the upper limbs or cervical region
• Any other current injury that would prevent participation in regular work-shift activities

Sponsors & Collaborators

• Mayo Clinic: lead

Study Sites (2)

Mayo Clinic Health System-La Crosse

La Crosse, Wisconsin, 54601, United States

Location

Driftless CrossFit

Onalaska, Wisconsin, 54650, United States

Location

MeSH Terms

Conditions

Shoulder Pain

Condition Hierarchy (Ancestors)

Arthralgia; Joint Diseases; Musculoskeletal Diseases; Pain; Neurologic Manifestations; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Study Officials

• Alecia Gende, DO, CAQSM

  Mayo Clinic

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Principal Investigator

Study Record Dates

• First Submitted: December 3, 2024
• First Posted: December 6, 2024
• Study Start: May 15, 2025
• Primary Completion: September 30, 2025
• Study Completion: September 30, 2025
• Last Updated: October 22, 2025

Record last verified: 2025-10

Data Sharing

• IPD Sharing: Will not share

Locations

US (2)