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

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.

Status

Completed

Phases

Unknown

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT07256483

Enrollment

Registered

2025-12-01

Start date

2025-09-01

Completion date

2026-02-15

Last updated

2026-02-20

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

Conditions

Shoulder Injuries

Brief summary

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?

Interventions

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

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

Study design

Allocation

NON_RANDOMIZED

Intervention model

CROSSOVER

Primary purpose

BASIC_SCIENCE

Masking

NONE

Eligibility

Sex/Gender

FEMALE

Age

18 Years to No maximum

Healthy volunteers

Yes

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.

Design outcomes

Primary

Measure	Time frame	Description
Intra-individual correlation of isokinetic torque peaks	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.

Countries

France

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 21, 2026