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Completed

NCT Number: NCT07256483

Influence of the Menstrual Cycle on the Maximal Strength of the External and Internal Rotators of the Shoulder in High-level Sports Women.

The goal of this prospective interventional study is to measure the strength of the external and internal rotator muscles of both shoulders (dominant and non-dominant) of Montpellier Hérault Rugby players at different stages of their menstrual cycle. During the menstrual phase (beginning of the follicular phase from D0 to D5) and during the ovulatory/early luteal phase (approximately D13 to D18 of the menstrual cycle). The study is conducted on volunteers.

The main question it aims to answer is : Is there an effect of the menstrual cycle on the maximum strength of the internal and external rotators of the shoulder in female athletes who play rugby?

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Key information

Conditions

Shoulder Injuries Wounds and Injuries

Age range

18 year and older

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

Primary location

Clinique St jean sud de france

Montpellier, 34430, France

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Montpellier Hérault Rugby player
  • Regular menstrual cycle
  • Adult who has received informed consent information about the study and signed the non-objection form

Exclusion criteria

  • Use or intake of contraception
  • Presence of a condition associated with the menstrual cycle
  • Recent injury or pain in the upper limbs lasting more than two weeks, incompatible with performing a test of maximum voluntary contraction of the shoulder rotators
  • Presence of an infectious disease (fever) that could skew temperature readings during menstrual cycle monitoring.

Treatment and study plan

Measure the strength of the external and internal rotator muscles of both shoulders.

Other

Measure the strength of the external and internal rotator muscles of both shoulders using a Cybex-type isokinetic dynamometer.

Primary outcomes

  1. Intra-individual correlation of isokinetic torque peaks

    Time frame: baseline and 15 days

    The intra-individual correlation of isokinetic torque peaks (in Nm) measured at two distinct phases of the menstrual cycle (D0-D5 and D13-D18), for each type of internal and external rotator contraction, and for each arm.

Sponsors and collaborators

Lead sponsor

Clinique Saint Jean, France

Other

Registry information

Official study title

Influence of the Menstrual Cycle on the Maximal Strength of the External and Internal Rotators of the Shoulder in High-level Sports Women From Montpellier Hérault Rugby.

Important dates

Study start
2025
Primary completion
2026
Study completion
2026
First posted
Dec 1, 2025
Registry last updated
Feb 20, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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