NCT06925022

Brief Summary

This phase of the project aims to analyze the interaction between physical exercise and the phases of the menstrual cycle, evaluating its impact on fatigue, functional capacity, and exercise perception in women with and without Multiple Sclerosis. To achieve this, a controlled, single-blind, prospective, 2x3 crossover, randomized clinical trial will be conducted, involving women with Multiple Sclerosis (MS), matched by age, lifestyle habits (smoking, physical activity), and geographic location with a group of women without MS. This study, aligned with previous findings, seeks to deepen the understanding of the role of exercise in managing Multiple Sclerosis symptoms and to promote greater adherence to personalized physical activity programs adapted to the phases of the menstrual cycle.

Trial Health

75
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
20

participants targeted

Target at below P25 for not_applicable

Timeline
1mo left

Started Dec 2024

Geographic Reach
1 country

1 active site

Status
active not recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Progress96%
Dec 2024May 2026

Study Start

First participant enrolled

December 15, 2024

Completed
2 months until next milestone

First Submitted

Initial submission to the registry

February 20, 2025

Completed
2 months until next milestone

First Posted

Study publicly available on registry

April 13, 2025

Completed
1.1 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

May 30, 2026

Expected
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

May 30, 2026

Last Updated

March 24, 2026

Status Verified

March 1, 2026

Enrollment Period

1.5 years

First QC Date

February 20, 2025

Last Update Submit

March 22, 2026

Conditions

Keywords

Lifestyle InterventionsMenstrual CycleMultiple SclerosisExerciseCognitive-behavioral interventionPhysical Activity, Psychosocial Well-beingNutrition intervention

Outcome Measures

Primary Outcomes (17)

  • Satisfaction with Physical Activity

    Satisfaction with Physical Activity will be measured using an 8-item scale. Items are rated on a 5-point Likert scale ranging from 1 (Totally disagree) to 5 (Totally agree). Total scores range from 8 to 40, with higher scores indicating greater satisfaction with physical activity.

    Post-intervention (immediately after) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Modified Fatigue Impact Scale (MFIS)

    Fatigue perception will be measured using the MFIS. This scale is a 21-item multidimensional questionnaire that evaluates the physical, cognitive, and psychosocial effects of fatigue on a five-point ordinal scale (with a maximum total score of 84).

    Post-intervention (immediately after) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Modified Fatigue Impact Scale (MFIS)

    Fatigue perception will be measured using the MFIS. This scale is a 21-item multidimensional questionnaire that evaluates the physical, cognitive, and psychosocial effects of fatigue on a five-point ordinal scale (with a maximum total score of 84).

    Post-intervention (24 hours after) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Modified Fatigue Impact Scale (MFIS)

    Fatigue perception will be measured using the MFIS. This scale is a 21-item multidimensional questionnaire that evaluates the physical, cognitive, and psychosocial effects of fatigue on a five-point ordinal scale (with a maximum total score of 84).

    Post-intervention (48 hours after) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Modified Fatigue Impact Scale (MFIS)

    Fatigue perception will be measured using the MFIS. This scale is a 21-item multidimensional questionnaire that evaluates the physical, cognitive, and psychosocial effects of fatigue on a five-point ordinal scale (with a maximum total score of 84).

    Post-intervention (72 hours after) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Visual Analogue Scale (VAS-F): Fatigue subscale

    The Visual Analogue Scale for Fatigue (VAS-F) assesses subjective perceptions of fatigue on a scale from 0 to 10, where 0 indicates no fatigue at all and 10 indicates extreme fatigue. Higher scores reflect greater perceived fatigue.

    Post-intervention (immediately after) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Visual Analogue Scale (VAS-F): Fatigue subscale

    The Visual Analogue Scale for Fatigue (VAS-F) assesses subjective perceptions of fatigue on a scale from 0 to 10, where 0 indicates no fatigue at all and 10 indicates extreme fatigue. Higher scores reflect greater perceived fatigue.

    Post-intervention (24 hours after) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Visual Analogue Scale (VAS-F): Fatigue subscale

    The Visual Analogue Scale for Fatigue (VAS-F) assesses subjective perceptions of fatigue on a scale from 0 to 10, where 0 indicates no fatigue at all and 10 indicates extreme fatigue. Higher scores reflect greater perceived fatigue.

    Post-intervention (48 hours after) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Visual Analogue Scale (VAS-F): Fatigue subscale

    The Visual Analogue Scale for Fatigue (VAS-F) assesses subjective perceptions of fatigue on a scale from 0 to 10, where 0 indicates no fatigue at all and 10 indicates extreme fatigue. Higher scores reflect greater perceived fatigue.

    Post-intervention (72 hours after) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Visual Analogue Scale (VAS-E): Energy subscale

    The Visual Analogue Scale for Energy (VAS-E) assesses subjective perceptions of Energy on a scale from 0 to 10, where 0 indicates no energy at all and 10 indicates maximum energy. Higher scores reflect greater perceived energy.

    Post-intervention (immediately after) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Visual Analogue Scale (VAS-E): Energy subscale

    The Visual Analogue Scale for Energy (VAS-E) assesses subjective perceptions of Energy on a scale from 0 to 10, where 0 indicates no energy at all and 10 indicates maximum energy. Higher scores reflect greater perceived energy.

    Post-intervention (24 hours after) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Visual Analogue Scale (VAS-E): Energy subscale

    The Visual Analogue Scale for Energy (VAS-E) assesses subjective perceptions of Energy on a scale from 0 to 10, where 0 indicates no energy at all and 10 indicates maximum energy. Higher scores reflect greater perceived energy.

    Post-intervention (48 hours after) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Visual Analogue Scale (VAS-E): Energy subscale

    The Visual Analogue Scale for Energy (VAS-E) assesses subjective perceptions of Energy on a scale from 0 to 10, where 0 indicates no energy at all and 10 indicates maximum energy. Higher scores reflect greater perceived energy.

    Post-intervention (72 hours after) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Visual Analogue Scale (VAS-P): Pain subscale

    The Visual Analogue Scale for Pain (VAS-P) assesses subjective perceptions of pain on a scale from 0 to 10, where 0 indicates no pain at all and 10 indicates worst possible pain. Higher scores reflect greater perceived pain.

    Post-intervention (immediately after) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Visual Analogue Scale (VAS-P): Pain subscale

    The Visual Analogue Scale for Pain (VAS-P) assesses subjective perceptions of pain on a scale from 0 to 10, where 0 indicates no pain at all and 10 indicates worst possible pain. Higher scores reflect greater perceived pain.

    Post-intervention (24 hours after) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Visual Analogue Scale (VAS-P): Pain subscale

    The Visual Analogue Scale for Pain (VAS-P) assesses subjective perceptions of pain on a scale from 0 to 10, where 0 indicates no pain at all and 10 indicates worst possible pain. Higher scores reflect greater perceived pain.

    Post-intervention (48 hours after) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Visual Analogue Scale (VAS-P): Pain subscale

    The Visual Analogue Scale for Pain (VAS-P) assesses subjective perceptions of pain on a scale from 0 to 10, where 0 indicates no pain at all and 10 indicates worst possible pain. Higher scores reflect greater perceived pain.

    Post-intervention (72 hours after) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

Secondary Outcomes (107)

  • Muscle oxygen saturation (SMO2)

    During intervention in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Capillary lactate concentration

    Post-intervention (immediately after) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Capillary lactate concentration

    During intervention in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Heart rate variability

    During intervention in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • Thyroid Stimulating Hormone (TSH)

    Pre-intervention (immediately before) in each menstrual phase: Early follicular (Days 2-5), Late follicular (Days -2 to 0, LH peak), and Mid-luteal (Days 6-9 after LH peak).

  • +102 more secondary outcomes

Study Arms (2)

Women with MS

EXPERIMENTAL

This arm will comprise women diagnosed with relapsing-remitting Multiple Sclerosis (RRMS) according to the McDonald criteria.

Other: Strength training session during Early Follicular PhaseOther: Strength Training Protocol during Late Follicular PhaseOther: Strength Training during Mid-Luteal Phase

Women without Multiple Sclerosis

OTHER

This arm will comprise women without Multiple Sclerosis, matched with the MS group based on age, lifestyle habits, and geographic location.

Other: Strength training session during Early Follicular PhaseOther: Strength Training Protocol during Late Follicular PhaseOther: Strength Training during Mid-Luteal Phase

Interventions

The strength training sessions follow guidelines and recent meta-analyses to optimize long-term outcomes. Participants will complete a standardized warm-up protocol consisting of 5 minutes on a stationary bike, lower limb mobility exercises, and 5 repetitions at 40% of their 1-RM on each machine before each strength training session. Subsequently, they will perform four exercises for the lower limbs, including bilateral leg press, unilateral leg extension, unilateral hip extension, and plantar flexion, using conventional weight machines (. Session intensity will be set at 70-75% of 1-RM, with a volume of 4 sets of 10 repetitions, leaving 1-2 reps in reserve (RIR), and with 120 seconds of rest between sets. This phase occurs approximately between days 11-13 of the menstrual cycle.

Women with MSWomen without Multiple Sclerosis

The strength training sessions follow guidelines and recent meta-analyses to optimize long-term outcomes. Participants will complete a standardized warm-up protocol consisting of 5 minutes on a stationary bike, lower limb mobility exercises, and 5 repetitions at 40% of their 1-RM on each machine before each strength training session. Subsequently, they will perform four exercises for the lower limbs, including bilateral leg press, unilateral leg extension, unilateral hip extension, and plantar flexion, using conventional weight machines (. Session intensity will be set at 70-75% of 1-RM, with a volume of 4 sets of 10 repetitions, leaving 1-2 reps in reserve (RIR), and with 120 seconds of rest between sets. This phase occurs around days 19-28 of the menstrual cycle, following ovulation.

Women with MSWomen without Multiple Sclerosis

The strength training sessions follow guidelines and recent meta-analyses to optimize long-term outcomes. Participants will complete a standardized warm-up protocol consisting of 5 minutes on a stationary bike, lower limb mobility exercises, and 5 repetitions at 40% of their 1-RM on each machine before each strength training session. Subsequently, they will perform four exercises for the lower limbs, including bilateral leg press, unilateral leg extension, unilateral hip extension, and plantar flexion, using conventional weight machines (. Session intensity will be set at 70-75% of 1-RM, with a volume of 4 sets of 10 repetitions, leaving 1-2 reps in reserve (RIR), and with 120 seconds of rest between sets. This phase occurs at the beginning of the menstrual cycle (days 2-5 after the onset of menstruation).

Women with MSWomen without Multiple Sclerosis

Eligibility Criteria

Age18 Years - 50 Years
Sexfemale
Healthy VolunteersYes
Age GroupsAdult (18-64)

You may qualify if:

  • Women of reproductive age (18-50 years) with MS will be included, with the upper age limit adjusted to reflect the reproductive phase;.
  • No iron-deficiency anemia.
  • Stable disease phase.
  • Independent walking ability for over 10 meters.
  • Women will be recruited first and later matched with men based on age, EDSS, and lifestyle habits (physical activity, smoking, and alcohol consumption).

You may not qualify if:

  • Score \<1 or \>6 on the EDSS.
  • Report a relapse within 12 months before the study begins.
  • Have taken corticosteroid treatment within the last 2 months.
  • Have participated in a structured training program in the previous 6 months.
  • Once all women with MS are recruited, male participants will be recruited following a 1:1 matching methodology based on age, geographic region, and lifestyle habits.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Hospital Universitario Virgen de la Arrixaca

Murcia, Murcia, 30120, Spain

Location

MeSH Terms

Conditions

Multiple Sclerosis, Relapsing-RemittingMultiple SclerosisMotor Activity

Condition Hierarchy (Ancestors)

Demyelinating Autoimmune Diseases, CNSAutoimmune Diseases of the Nervous SystemNervous System DiseasesDemyelinating DiseasesAutoimmune DiseasesImmune System DiseasesBehavior

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
TRIPLE
Who Masked
PARTICIPANT, INVESTIGATOR, OUTCOMES ASSESSOR
Masking Details
In this study, double blinding will be implemented to reduce bias in data collection. On one hand, the participants will not know which phase of the menstrual cycle they are in at the time of evaluation. For this purpose, the scheduling of measurements will be based on prior records. On the other hand, the researchers will also be unaware of the menstrual cycle phase. The assignment of phases and groups will be managed by an independent study coordinator who will not participate in direct evaluations. Additionally, the data will be coded to ensure that evaluators cannot identify the study variables during the measurement process.
Purpose
SUPPORTIVE CARE
Intervention Model
CROSSOVER
Model Details: Women with and without multiple sclerosis will participate in a strength training session during three phases of the menstrual cycle: early follicular phase, late follicular phase, and mid-luteal phase. Before and after each session, various measurements will be taken to assess physiological and performance responses.
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Principal Investigator

Study Record Dates

First Submitted

February 20, 2025

First Posted

April 13, 2025

Study Start

December 15, 2024

Primary Completion (Estimated)

May 30, 2026

Study Completion (Estimated)

May 30, 2026

Last Updated

March 24, 2026

Record last verified: 2026-03

Locations