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

Clinique Saint Jean, France

Status: Enrolling

Conditions: Shoulder Injuries

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

Study type: Interventional

Funder types: Other

Identifiers

NCT07256483

2025-A01018-41

Details and patient eligibility

About

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?

Enrollment: 30 estimated patients

Sex: Female

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion and exclusion criteria

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.

Trial design

Primary purpose: Basic Science

Allocation: Non-Randomized

Interventional model: Crossover Assignment

Masking: None (Open label)

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30 participants in 2 patient groups

follicular phase

Experimental group

Description:

Measures during the follicular phase from D0 to D5

Treatment:

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

early luteal phase

Active Comparator group

Description:

Measures during the ovulatory/early luteal phase (approximately days 13 to 18 of the menstrual cycle)

Treatment:

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