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Functional hypothalamic amenorrhea (FHA) is a condition where women lose their menstrual periods, typically due to a combination of stress and insufficient calorie intake to fuel their daily physical activity (low energy availability). Standard medical advice often requires these women to completely stop exercising to recover their energy balance and hormones. However, this "complete rest" approach can cause severe anxiety for active individuals and removes the necessary mechanical loading that keeps bones strong.
This study evaluates the safety and effectiveness of an 8-week supervised resistance training (weightlifting) program as a realistic alternative treatment for active women with FHA. The researchers compare a group of women experiencing FHA to a control group of women with regular menstrual cycles. Over the 8 weeks, participants complete three moderate-intensity, full-body weightlifting sessions per week.
The primary goal is to determine if women with FHA can successfully recover their menstrual cycles while continuing to lift weights. Additionally, the study monitors changes in muscle strength, jumping performance, body composition, resting heart rate, and psychological well-being. Ultimately, this study aims to provide healthcare providers and coaches with evidence-based strategies that allow female athletes to safely maintain their athletic identity and physical health during recovery.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Women with functional hypothalamic amenorrhea (absence of menses for at least three consecutive mont | Experimental |
| |
| Eumenorrheic women with regular ovulatory cycles (24-35 days) performing the same 8-week supervised | Experimental |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Resistance Training Program | Other | Supervised 8-week resistance training program consisting of three non-consecutive full-body sessions per week. Each session included four multi-joint exercises targeting upper and lower body muscle groups. Training dosage: Volume: Two working sets of 6-8 repetitions per exercise. Intensity: Individualized loads progressed weekly from 60% to 80% of estimated 1RM. 1RM was estimated using the Epley equation. Effort: Performed at 0-1 repetitions in reserve (RIR). Rest:Standardized 1-minute intervals between sets. Adherence was tracked via a mobile application, recording load, sets, repetitions, and session RPE. Training was conducted under professional supervision to ensure safety and protocol compliance. |
| Measure | Description | Time Frame |
|---|---|---|
| Incidence of Menstrual Recovery | Number of participants in the Functional Hypothalamic Amenorrhea (FHA) group who experience at least one spontaneous menstrual bleeding episode during the 8-week intervention. Menstrual status is monitored daily using non-invasive methods: self-reported menstrual diaries and basal body temperature (BBT) tracking with a digital thermometer (SENTI2) to identify hormonal fluctuations. Recovery is defined as the occurrence of the first menses post-intervention commencement. | 8 weeks |
| Measure | Description | Time Frame |
|---|---|---|
| Change in Neuromuscular Performance (Lower Limb Power) | Evaluation of lower-limb power through the Countermovement Jump (CMJ) test performed on a force platform. Jump height (cm) and power output (W/kg) were recorded to assess neuromuscular adaptations. | Baseline and 8 weeks |
| Change in Neuromuscular Performance (Upper Limb Power) |
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Inclusion Criteria:
Exclusion Criteria:
Pregnancy: Current pregnancy.
Female participants aged over 18 years, including women with amenorrhea and eumenorrheic women, who have not previously engaged in strength training exercise prior to the interventio
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Universidad Católica de Murcia | Murcia | Murcia | 30107 | Spain |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 29135914 | Background | Bunt S, Steverink N, Andrew MK, Schans CPV, Hobbelen H. Cross-Cultural Adaptation of the Social Vulnerability Index for Use in the Dutch Context. Int J Environ Res Public Health. 2017 Nov 14;14(11):1387. doi: 10.3390/ijerph14111387. | |
| 28368520 | Background | Cahoon EK, Nadyrov EA, Polyanskaya ON, Yauseyenka VV, Veyalkin IV, Yeudachkova TI, Maskvicheva TI, Minenko VF, Liu W, Drozdovitch V, Mabuchi K, Little MP, Zablotska LB, McConnell RJ, Hatch M, Peters KO, Rozhko AV, Brenner AV. Risk of Thyroid Nodules in Residents of Belarus Exposed to Chernobyl Fallout as Children and Adolescents. J Clin Endocrinol Metab. 2017 Jul 1;102(7):2207-2217. doi: 10.1210/jc.2016-3842. |
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| ID | Term |
|---|---|
| D000568 | Amenorrhea |
| D000080822 | Relative Energy Deficiency in Sport |
| ID | Term |
|---|---|
| D008599 | Menstruation Disturbances |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D001068 | Feeding and Eating Disorders |
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Evaluation of upper-limb strength through handgrip dynamometry testing. Grip strength (kg) was recorded to assess changes in maximal upper-limb force production. |
| Baseline and 8 weeks |
| Change in Body Mass | Evaluation of body mass using bioelectrical impedance analysis. Body mass (kg) will be assessed before and after the intervention to monitor changes associated with menstrual recovery and the exercise intervention. | Baseline and 8 weeks |
| Change in Fat Mass | Evaluation of fat mass using bioelectrical impedance analysis. Fat mass (%) will be assessed before and after the intervention to determine body composition changes during menstrual recovery. | Baseline and 8 weeks |
| Change in Body Mass Index | Body mass index (BMI, kg/m²) will be calculated from body mass and height measurements to evaluate anthropometric changes following the intervention. | Baseline and 8 weeks |
| Change in Health-Related Quality of Life | Assessment of psychological well-being using the Short Form-36 (SF-36) questionnaire. This tool evaluates eight health domains, with total scores ranging from 0 to 100; higher scores indicate better health status and quality of life. | Baseline and 8 weeks |
| Pittsburgh Sleep Quality Index | A 19-item questionnaire generating seven component scores and one global score used to assess sleep quality. The global PSQI score ranges from 0 to 21 points, with higher scores reflecting poorer sleep quality. A global score >5 indicates poor sleep quality. | Baseline and 8 weeks |
| Low Energy Availability in Females Questionnaire | The Low Energy Availability in Females Questionnaire (LEAF-Q) is a 25-item instrument designed to assess risk factors associated with low energy availability in physically active females, including menstrual function, gastrointestinal symptoms, and injury history. The questionnaire provides a total score ranging from 0 to 25 points, with higher scores indicating greater risk of low energy availability and related conditions. A total score ≥8 is considered indicative of increased risk for low energy availability and the Female Athlete Triad/Relative Energy Deficiency in Sport (RED-S). | Baseline and 8 weeks |
| Eating Attitudes Test | The Eating Attitudes Test-26 (EAT-26) is a 26-item questionnaire assessing symptoms and concerns characteristic of eating disorders. It provides a total score and three subscales: dieting, bulimia and food preoccupation, and oral control. Total scores range from 0 to 78 points, with higher scores indicating greater disordered eating symptomatology. A total score ≥20 suggests potentially problematic eating behaviors and risk of eating disorders. | Baseline and 8 weeks |
| Menstrual Distress Questionnaire | The Menstrual Distress Questionnaire (MDQ) is a 22-item Likert-scale questionnaire designed to assess physical, psychological, and behavioral symptoms associated with the menstrual cycle. The questionnaire provides a total score ranging from 22 to 110 points, with higher scores indicating greater menstrual-related distress and symptom severity. | Baseline and 8 weeks |
| Change in Cardiac Autonomic Regulation | Assessment of heart rate variability (HRV) through the root mean square of successive differences between adjacent R-R intervals recorded via a heart rate monitor at rest.The following variables were obtained: mean R-R interval (RR, ms) and the root mean square of successive differences between adjacent R-R intervals (RMSSD, ms), to assess autonomic nervous system activity and cardiac autonomic modulation. | Baseline and 8 weeks |
| D001523 | Mental Disorders |