Stretching to Improve Jumping Performance

NCT ID: NCT06944652

Last Updated: 2025-04-25

Basic Information

• Recruitment Status: RECRUITING
• Clinical Phase: NA
• Total Enrollment: 40 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2025-04-28
• Study Completion Date: 2026-05-30

Brief Summary

The study involves comparison of an 8-week plantar flexor stretching program to a shoulder stretching program for improving vertical jump performance in adolescent athletes.

Detailed Description

Increasing flexibility may improve vertical jump performance. For example, being able to go deeper into a squat before jumping may allow for greater force development through the range of movement and this may transfer to greater vertical jump height. The study compares plantar flexor stretching to shoulder stretching for improving vertical jump performance in adolescent athletes. Athletes are being stratified by sex and maturity status (before or after estimated age at peak height velocity) and randomized to one of two groups: Plantar flexor stretching (2 sets of 6 stretches, 5 times per week) or the same volume of shoulder stretching. Before and after training, participants are being assessed for vertical jump and landing performance.

Conditions

Vertical Jump Performance

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: OTHER
• Blinding Strategy: SINGLE

Study Groups

Plantar flexor stretching

Flexibility training (stretching) of the muscles at the back of the lower leg

Group Type: EXPERIMENTAL

Stretching

Intervention Type: OTHER

Stretching of the plantar flexors or the shoulder joint

Shoulder stretching

Flexibility training (stretching) of the muscles surrounding the shoulder joint

Group Type: ACTIVE_COMPARATOR

Stretching

Intervention Type: OTHER

Stretching of the plantar flexors or the shoulder joint

Interventions

Stretching

Stretching of the plantar flexors or the shoulder joint

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• Currently involved in a sport training program

Exclusion Criteria

• Current or past injuries that might affect jumping performance or stretching the plantar flexors or shoulder joint

• Minimum Eligible Age: 12 Years
• Maximum Eligible Age: 17 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University of Saskatchewan

OTHER

Sponsor Role: lead

Responsible Party

Phil Chilibeck

Professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

College of Kinesiology University of Saskatchewan

Saskatoon, Saskatchewan, Canada

Site Status: RECRUITING

Countries

Canada

Central Contacts

Philip Chilibeck, PhD

Role: CONTACT

phil.chilibeck@usask.ca

306-966-1072

Facility Contacts

Philip Chilibeck

Role: primary

phil.chilibeck@usask.ca

3062303849

Other Identifiers

4925

Identifier Type: -

Identifier Source: org_study_id