The effect of repetitive isometric contraction on muscle hardness of supraspinatus -examination by ultrasonic elastography-

Status

Active, not recruiting

Phases

Early Phase 1

Study type

Interventional

Source

JPRN

Registry ID

JPRN-jRCT1030210675

Enrollment

Registered

2022-03-18

Start date

2022-03-18

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

Infraspinatus muscle hardness

Interventions

Participants are in the supine position on the bed,and the right shoulder joint is externally rotated and extended and internally displaced. From there,in the abduction direction on the scapular surfa

Eligibility

Sex/Gender

Male

Inclusion criteria

Inclusion criteria: Healthy male between the ages of 20 and 49

Exclusion criteria

Exclusion criteria: Male with pain in the elbow joint Male with a history of surgery on the elbow joint

Design outcomes

Primary

Measure	Time frame
Strain ratio of the infraspinatus	—

Secondary

Measure	Time frame
Range of motion of tying movement	—

Contacts

Public ContactTaketo Shiraoka

Saitama Medical University Kawagoe Clinic

gakujin-s@hotmail.co.jp+81-49-238-8111

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026