Female Athlete Triad and Relative Energy Deficiency in Sport (REDs): Nutritional Management.

The female athlete triad (TRIAD) is a spectrum of disorders involving low energy availability (LEA), low bone mineral density, and menstrual disorders. It is increasingly common to use the term 'relative energy deficiency in sport' (RED), emphasising the extensive impact of LEA on the body. The aim of this narrative review was to gather original research encompassing female athletes across various sports as well as to collect findings on the potential of a nutrition-focused approach to prevent or treat the aforementioned disorders. A comprehensive search was conducted in PubMed and Scopus. Several challenges were identified regarding the adequacy of the energy availability, protein, and carbohydrate requirements in the diets of female athletes. Moreover, insufficient intake of vitamin D has been observed across all athlete groups studied. This insufficiency also extends to the average requirement for Ca, Mg, the Ca/P ratio, Zn, and Fe. To address those concerns, a nutritional approach is proposed in the latter part of this review. The factors that can improve the absorption of micronutrients have also been discussed. The TRIAD/REDs affect an ever-growing number of women and require appropriate therapeutic management, particularly through nutritional care. Therefore, cooperation within an interdisciplinary team comprising a physician, nutritionist, physiotherapist, and psychologist is crucial.

Differences in screening and treating relative energy deficiency in sport between the United States of America and Japan.

BACKGROUND: The diagnosis and treatment of relative energy deficiency in sport (RED-S) are challenging owing to variations in symptoms and the absence of specific guidelines. This study aimed to investigate differences in the diagnosis and follow-up of RED-S, its consequences, and related factors among sports medicine physicians with different backgrounds in Japan and the USA and examine the differences between the two countries. METHODS: An anonymous survey regarding the diagnosis and treatment processes of RED-S was distributed to sports medicine physicians via email. Respondents included 58 sports medicine physicians from the USA and 241 from Japan. RESULTS: The findings showed that 77.6% of the US physicians screened athletes for RED-S, whereas 17.5% of their Japanese counterparts did so. Moreover, 98.3% and 36.7% of the US and Japanese physicians, respectively, answered that they screened athletes for eating disorders upon suspicion of low energy availability. Logistic regression analysis revealed that the number of US sports medicine physicians who screened athletes for the female athlete triad (Triad) and RED-S (odds ratio [OR] = 12.78, P<0.001) and adhered to specific criteria for athlete suspension and return-to-play (OR=33.67, P<0.01) was higher than that of their Japanese counterparts. CONCLUSIONS: The prevalence of RED-S-related screening and treatment differed between US and Japanese sports medicine physicians. Educating sports medicine physicians about the diagnosis and treatment of athletes with possible signs of RED-S is important in treating female athletes and further investigations are required to identify why the physicians screened/not screened the athletes.

Title IX's Unintended Consequences: The Female Athlete Triad and the Need for Special Treatment.

This Note examines the effects of Title IX's equal treatment framework on female collegiate athletes in the context of the female athlete triad. It describes the shortcomings of Title IX's equal treatment approach and its deleterious effects on the health of female student athletes. It argues for the adoption of the special treatment approach as a remedy.

Female Athlete Triad: Lack of Awareness and Subsequent Consequences.

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Female athlete triad affects rat intestinal morphology and sucrase-isomaltase expression.

Female athletes follow a strict diet and perform rigorous exercise to boost their performance, which induces health issues called the female athlete triad (FAT), defined as the combination of disordered eating, amenorrhoea and low bone mineral density. It is known to have a significant effect on bones. However, its effects on the small intestine, which is responsible for nutrient uptake into the body, remain unclear. In this study, we created an animal model of FAT to examine its effects on digestive and absorptive molecules in the small intestine. Thirty 5-week-old female Sprague-Dawley (sd) rats with an initial body weight of about 147 g were divided into control (Con, n = 7), exercise (Ex, n = 7), food restriction (FR, n = 8) and exercise plus food restriction (FAT, n = 8) groups. The rats were subjected to 4 weeks of wheel running (Ex, FAT) and 50-40 % food restriction (FR, FAT) to examine the effects on bone and typical digestive enzymes and transporters in the jejunum. Two-way ANOVA and the Kruskal-Wallis test were used for statistical analysis of normal and non-normal data, respectively. Four weeks of exercise and food restriction decreased bone weight (vs. other group P < 0·01) and bone breaking power (vs. other group P < 0·01). Villus height decreased in the jejunum (vs. other group P < 0·01), but the expression of typical macronutrients digestive enzyme and absorptive molecules remained unchanged. In contrast, sucrase-isomaltase gene (v. Ex P = 0·02) and protein expression were increased (vs. other group P < 0·05). The study findings show that FAT affects sucrase-isomaltase without histone methylation changes.

The Impact of Competitive Swimming on Menstrual Cycle Disorders and Subsequent Sports Injuries as Related to the Female Athlete Triad and on Premenstrual Syndrome Symptoms.

Background: An athlete's menstrual cycle may be seriously disturbed when she undertakes a physical activity that exceeds the body's adaptive capacity and/or applies dietary restrictions. The main aim of this study was to assess the impact of swimming training undertaken by participants of sport clubs on disorders of the menstrual cycle. METHODS: The study involved 64 female athletes. The questionnaire utilized in this study was composed by the authors, however some of the questions were based on Low Energy Availability in Females Questionnaire (LEAF-Q). RESULTS: 31.26% of swimmers reported that the menstrual cycle was stopped for more than 3 months, of which 21.88% had a menstrual absence for more than 6 months and 9.38% between 3 months and 6 months. Years of training were a positive predictor of the 'more profuse bleeding'. There was a negative correlation between the disorders of the menstrual cycle, the body weight of the female participants (p < 0.05) and the body mass index (p < 0.01). It was found that with the severity of the degree of disorder in the menstrual cycle, the number of injuries among the surveyed swimmers increased (p < 0.05). CONCLUSIONS: The correct body weight of the participants was a positive predictor of the absence of the menstrual cycle disorders among the majority of women practicing swimming. Disorders in the menstrual cycle occurring in a certain percentage of the swimmers positively correlated with the number of injuries recorded among these swimmers. Swimming has been shown to alleviate some of the premenstrual symptoms.

Relative energy deficiency in sport (RED - S).

Relative Energy Deficiency in Sport (RED-S) refers to a condition in which energy imbalance leads to impaired physiological function of multiple organ systems and expands on the diagnosis previously known as the Female Athlete Triad. Researchers attribute the medical complications of RED-S to low energy availability, in which energy availability is defined as dietary energy intake minus exercise energy expenditure divided by fat-free mass. This article reviews the history of this diagnosis, the changing terminology, and the reasons for the expansion. Accepted definitions of each part of the energy availability equation are considered and the difficulties that exist using these equations in practice or comparatively in the literature are assessed. The review analyzes the broad spectrum of health consequences of RED-S, especially as it relates to hypoestrogenemia and menstrual function, gives guidance to those caring for athletes on the identification and management of RED-S, and sheds lights on the important role of coaches, athletic trainers, and families in recognizing this diagnosis and in helping getting patients to care.

[Relative energy deficiency in sport: modern approaches to diagnostics, treatment and prevention].

In recent years, close attention has been paid to energy deficiency in professional athletes. More and more studies confirm the widespread prevalence of relative energy deficiency syndrome in sports and its relationship with various pathological conditions that lead to a decrease in the level of athletic performance. Nowadays the possibilities of early diagnosis and treatment of this syndrome are being carefully studied, and clinical protocols are being actively developed to facilitate the early detection of energy deficiency. The aim of the study was to summarize the modern data on the influence of the syndrome of relative energy deficiency in sports on the health and performance of athletes, as well as to consider effective methods for the diagnosis, treatment and prevention of this syndrome. Material and methods. The search was carried out using the Google Academy engine and electronic databases PubMed, MEDLINE, EMBASE, Scopus, Web of Science, eLIBRARY for the period from 2017 to 2021. For the search, we used keywords and their combinations: "relative energy deficit in sports", "female athlete triad", "menstrual dysfunction", "osteoporosis". Results. Based on our analysis, we can conclude that the syndrome of relative energy deficit in sports has a multicomponent negative effect on the athlete's organism and negatively affects his performance, well-being and sports results. Diagnosis of this condition is challenging due to the nonspecificity and variety of symptoms. Key diagnostic methods include physical examination, anamnesis gaining, dual energy X-ray absorptiometry, bioimpedance body composition analysis, and hormonal profile studies. Additional methods include: electrocardiography, study of the basal metabolic rate, hematological examination (hemoglobin, ferritin, etc.), determining the level of energy consumption using diaries of food and physical activity, determining blood vitamin level, etc. To facilitate the screening, diagnosis and follow-up of athletes, it is possible to use specially developed clinical protocols. Non-drug nutritional correction and optimal training plan are the main methods of treatment and prevention of energy deficiency. If this type of treatment is ineffective, hormone therapy should be considered. It is recommended to use transdermal estrogen therapy in combination with shortterm progestin therapy. In some cases, when very low bone mineral density or delayed fracture consolidation is detected, it is possible to use recombinant parathyroid hormone. Conclusion. Due to the relatively high prevalence of relative energy deficiency syndrome in athletes of both sexes and its long-term negative impact on athlete health and performance, further research is needed to improve the effectiveness of early diagnosis, prevention and treatment of pathological conditions associated with malnutrition.

An Assessment of the Early Symptoms of Energy Deficiency as a Female Athlete Triad Risk among the Polish National Kayaking Team Using LEAF-Q.

Background: Kayaking is a high intensity sport that demands high levels of aerobic and anaerobic capacity as well as a great deal of strength and endurance. The aim of this study was an assessment of the frequency of occurrence of early low energy availability symptoms using the Low Energy Availability in Females Questionnaire for women belonging to the Polish national kayaking team. Additionally, quantitative measurements of body composition and levels of calcium were performed. Methods: The study involved 33 women who were competitors in the Polish national kayaking team. Results: An analysis of the results in terms of disorders in the monthly cycle in the tested kayakers found that only five competitors, approximately 15% of the entire group, had this type of problem. Between the participants who had disorders of the menstrual cycle and those whose cycle was normal, there was only a statistically significant difference at the level of p < 0.001 in relation to the age of the kayakers. Conclusions: The Low Energy Availability in Females Questionnaire proved to be a useful screening tool, which allowed for the early detection of Female Athlete Triad symptoms in several young female kayakers from the Polish national team.

Female Athlete Triad and Male Athlete Triad Syndrome Induced by Low Energy Availability: An Animal Model.

Energy availability (EA) is defined the difference in energy intake and exercise energy expenditure. Reduction of EA (i.e. Low energy availability, LEA) often causes abnormalities of reproduction system and drastic bone loss in some female athletes, the phenomenon is called as female athlete triad. More than ever before, it is considered a serious problem, the reason of these are (1) the syndrome occurred in female athletes but also male athletes, (2) LEA is leads to dysfunction of various organs other than reproductive system (Relative energy deficiency in sport, RED-S). On the other hand, we have focused on this syndrome and have proposed novel insights into the physiological effects of LEA on bone and solutions through nutritional treatment by recreating it in animal models. In this review, we will summarize the epidemiological and physiological perspectives of these diseases from historical background to recent findings, and introduce the usefulness of using animal models to explore mechanisms and treatments.

Restrictive Eating and Prior Low-Energy Fractures Are Associated With History of Multiple Bone Stress Injuries.

Bone stress injuries (BSIs) are common among athletes and have high rates of recurrence. However, risk factors for multiple or recurrent BSIs remain understudied. Thus, we aimed to explore whether energy availability, menstrual function, measures of bone health, and a modified Female Athlete Triad Cumulative Risk Assessment (CRA) tool are associated with a history of multiple BSIs. We enrolled 51 female runners (ages 18-36 years) with history of ≤1 BSI (controls; n = 31) or ≥3 BSIs (multiBSI; n = 20) in this cross-sectional study. We measured lumbar spine, total hip, and femoral neck areal bone mineral density by dual-energy X-ray absorptiometry, bone material strength index using impact microindentation, and volumetric bone mineral density, microarchitecture, and estimated strength by high-resolution peripheral quantitative computed tomography. Participants completed questionnaires regarding medical history, low-energy fracture history, and disordered eating attitudes. Compared with controls, multiBSI had greater incidence of prior low-energy fractures (55% vs. 16%, p = .005) and higher modified Triad CRA scores (2.90 ± 2.05 vs. 1.84 ± 1.59, p = .04). Those with multiBSI had higher Eating Disorder Examination Questionnaire (0.92 ± 1.03 vs. 0.46 ± 0.49, p = .04) scores and a greater percentage difference between lowest and highest body mass at their current height (15.5% ± 6.5% vs. 11.5% ± 4.9% p = .02). These preliminary findings indicate that women with a history of multiple BSIs suffered more prior low-energy fractures and have greater historical and current estimates of energy deficit compared with controls. Our results provide strong rationale for future studies to examine whether subclinical indicators of energy deficit contribute to risk for multiple BSIs in female runners.

Low energy availability surrogates associated with lower bone mineral density and bone stress injury site.

BACKGROUND: Exercise is an osteogenic stimulus that should increase bone mineral density (BMD) and protect against injury. However, some female athletes have lower BMD and increased bone stress injury (BSI) risk. Impaired bone health seen in athletes may be explained by low energy availability as described by concepts of Relative Energy Deficiency in Sport (RED-S) and Female Athlete Triad (Triad). OBJECTIVE: To elucidate the relationship between RED-S/Triad risk factors and BSI to high-risk (femoral neck, sacrum) and low-risk (other) bones. DESIGN: Cross-sectional survey and retrospective chart review. SETTING: Tertiary care academic center. PATIENTS: Female athletes aged 15-30 years participating in ≥4 h/week of exercise presenting to sports medicine/orthopedics clinic who had a self-reported BSI and available dual-energy x-ray absorptiometry (DXA) measurement of BMD. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASUREMENTS: Location of BSI. RESULTS: In 127 athletes, high-risk BSI was associated with surrogates of low energy availability (p = .032) and having a DXA Z-score < -1 (p = .035) but not a current/past history of menstrual dysfunction (p = .348). Accumulating RED-S/Triad risk factors increase the odds of incurring a high-risk BSI (p = .048). CONCLUSIONS: Adolescent/young female athletes who sustain BSI at high-risk sites (femoral neck, sacrum) may have underlying risk factors (eg, low energy availability, poor overall bone health) that should prompt further workup and referral to optimize health in these athletes.

Nutritional Concerns among Female International Volunteers Based on the Income and Development Status of Their Country of Service.

This study aimed to determine the prevalence of female athlete triad risk factors among female international volunteers based on the development and income status of their country of service. A total of 2164 past volunteers completed a retrospective survey. Countries' income and development statuses were coded using the respective annual United Nations World Economic Situations and Prospects reports. Independent t-tests, ANOVAs, and Pearson's Chi-Squared tests were used to assess group differences; corresponding odds ratios were calculated. Volunteers in nondeveloped (OR = 2.25, CI = 1.85-2.75) and non-high-income (OR = 2.17, CI = 1.75-2.70) countries had over twice the odds of experiencing secondary amenorrhea. More volunteers who served in nondeveloped countries reported an increase in exercise while serving (p = 0.005). Those who served in a nondeveloped (OR = 1.52, CI = 1.16-1.98) or non-high-income (OR = 1.45, CI = 1.08-1.94) country had higher odds of weight loss. However, volunteers serving in nondeveloped (OR = 0.52, CI = 0.44-0.63) and non-high-income (OR = 0.50, CI = 0.4-0.61) countries were less likely to report food insecurity compared to those in developed and high-income countries. Bone mineral density was within the expected range regardless of income and development status. Female volunteers who served in nondeveloped and non-high-income countries experienced higher odds of secondary amenorrhea, which was likely influenced by an increase in exercise and higher odds of weight loss.

Knowledge of the Female Athlete Triad and Relative Energy Deficiency in Sport Among Female Cross-Country Athletes and Support Staff.

CONTEXT: Female endurance athletes exhibit an increased risk of the female athlete triad (Triad) and relative energy deficiency in sport (RED-S). The triad and RED-S are conditions that involve the health and performance consequences of low energy availability. Few authors of studies to date have assessed the knowledge that athletes, coaches, and athletic trainers (ATs) have regarding the Triad or RED-S. Proper education has been shown to be effective in increasing knowledge of sports medicine concerns for athletes, yet no known continuing education programs for the Triad or RED-S exist at collegiate institutions. OBJECTIVE: To assess the knowledge, confidence, and educational impact of identifying, screening, treating, and preventing the Triad or RED-S. DESIGN: Cross-sectional study. SETTING: An evidence-based online survey was developed and administered via Qualtrics. PATIENTS OR OTHER PARTICIPANTS: Female collegiate cross-country athletes (n = 275, age = 20 ± 1 years), collegiate cross-country coaches (n = 55, age = 34 ± 9 years), and ATs working with cross-country teams (n = 30, age = 36 ± 11 years). MAIN OUTCOME MEASURE(S): Knowledge, confidence, and educational impact scores were assessed among groups using analysis of variance. Independent t tests were calculated to determine differences in impact scores between people who had or had not received education on the topic. RESULTS: Female cross-country athletes' total knowledge, confidence, and educational impact scores (mean scores = 25.00 ± 5.27, 95.42 ± 28.83, and 18.81 ± 7.05, respectively) were different from those of coaches (mean scores = 26.92 ± 5.02, 111.35 ± 24.14, and 22.41 ± 6.33, respectively) and ATs (mean scores = 28.66 ± 4.02, 117.67 ± 22.53, and 23.93 ± 5.69, respectively; P < .05). CONCLUSIONS: Knowledge, confidence, and educational impact scores regarding Triad or RED-S were lowest in female cross-country athletes and highest in ATs. These findings support the call for education, which should be regarded as the primary tool for increasing knowledge, to improve the prevention and treatment of the Triad or RED-S.

The Female Athlete Triad-the impact of running and type of diet on the regularity of the menstrual cycle assessed for recreational runners.

Background: The Female Athlete Triad (FAT) included three interrelated conditions including disordered eating, amenorrhea, and osteoporosis. The American College of Sports Medicine updated the definition of FAT to reflect the interdependence of low energy availability with or without eating disorders. The main aim of the study was to assess the impact of recreational running on potential disturbances in the regularity of women's menstrual cycles. Additionally, this work compared differences in the menstrual cycle between women runners and women who did not regularly practice sports. The respondents were also asked about the type of diet they consumed. Methods: A total of 360 women took part in the research. This group included 217 runners and 143 control. The authors' questionnaire was used in the research. Results: When compared to the control group, the runners had an increased frequency of menstrual cycles of <24 days (10.14% vs. 3.50%), fewer typical cycles of 25-31 days (75.58% vs. 86.71%), had fewer regular cycles per year (9.62 vs. 11.22), shorter duration of bleeding (4.79 vs. 5.27 days), and an increased frequency of painless menstruation (23.96% vs. 7.69%). A positive predictor of menstrual cycle disorders was the use of a 'special diet' (R:1.67; 95% C:0.47-2.87). Conclusions: The runners had shorter and less regular monthly cycles and shorter and more often painless menstrual bleeding when compared to the control group. The frequency of menstrual disorders in runners was increased by following a 'special diet'. The frequency of menstrual cycle disorders in runners, however, did not differ significantly from the control group.

Prevalence of Female Athlete Triad Risk Factors among Female International Volunteers and College Age-Matched Controls.

This study retrospectively compared the prevalence of factors related to the female athlete triad (low energy availability, secondary amenorrhea (SA), low bone mineral density (BMD)), and post-study BMD of female college students and female international volunteer missionaries (volunteers). Female college students (21-26 years) completed a survey that retrospectively assessed an 18-month study period (volunteer service or first 18 months of college); Diet History Questionnaire III (DHQ III) and Dual-Energy X-ray Absorptiometry (DXA) scan were optional. One-way ANOVAs and chi-squared distributions assessed group differences. Logistic regression assessed covariates of SA and BMD; corresponding odds ratios (OR) and confidence intervals (CI) were calculated. Statistical significance was set at p < 0.001. 3683 participants (58.8% volunteers, 31.5% non-volunteers, 9.8% others) provided complete survey data; 246 completed the DHQ III, and 640 had a post-study DXA scan. Volunteers had higher metabolic equivalent (MET) hours than non-volunteers and others (p < 0.001), and higher prevalence of food insecurity (p < 0.001) and SA (p < 0.001). Volunteers had higher odds of SA (OR = 2.17, CI = 1.75-2.62) than non-volunteers. Weight loss, body satisfaction, "other" weight loss methods, increased MET hours, and vomiting during the study period increased participants' odds of SA. Participants' average BMD Z-scores were within the expected range at all sites, with no significant group differences. Volunteers' higher MET hours and higher prevalence of food insecurity and SA did not result in significantly lower post-study period BMD.

Examination of the Prevalence of Female Athlete Triad Components among Competitive Cheerleaders.

The purpose of this study was to examine individual and combined Female Athlete Triad components within collegiate cheerleaders, an at-risk group. Cheerleaders (n = 19; age: 20.3 ± 1.2 years) completed anthropometric measurements, health history questionnaires, resting metabolic rate, the eating disorder inventory-3 and symptom checklist, blood sample, and DXA scan. Participants completed dietary and exercise logs for 7 days and used heart rate monitors to track daily and exercise energy expenditure. Proportions were calculated for low energy availability (LEA) risk, disordered eating risk, and pathogenic behaviors. Chi-square analysis was used to determine the difference between cheerleaders who experience low EA with or without disordered eating risk. All cheerleaders demonstrated LEA for the days they participated in cheerleading practice, 52.6% demonstrated LEA with eating disorder risk and 47.4% demonstrated LEA without eating disorder risk, 52.6% self-reported menstrual dysfunction, 14% experienced menstrual dysfunction via hormonal assessment, and 0% demonstrated low bone mineral density. Overall, 47.7% presented with one Triad component, 52.6% demonstrated two Triad components using self-reported menstrual data, and 10.5% demonstrated two Triad components using hormonal assessments. All cheerleaders displayed LEA. These findings support the need for increased education on the individual components of the Triad and their potential consequences by qualified personal.

The Path Towards Progress: A Critical Review to Advance the Science of the Female and Male Athlete Triad and Relative Energy Deficiency in Sport.

Energy status plays a key role in the health of athletes and exercising individuals. Energy deficiency/low energy availability (EA), referring to a state in which insufficient energy intake and/or excessive exercise energy expenditure has resulted in compensatory metabolic adaptations to conserve fuel, can affect numerous physiological systems in women and men. The Female Athlete Triad, Male Athlete Triad, and Relative Energy Deficiency in Sport (RED-S) models conceptualize the effects of energy deficiency in athletes, and each model has strengths and limitations. For instance, the Female Athlete Triad model depicts relationships between low EA, reproductive, and bone health, underpinning decades of experimental evidence, but may be perceived as limited in scope, while the more recent RED-S model proposes a wider range of potential health effects of low EA, though many model components require more robust scientific justification. This critical review summarizes current evidence regarding the effects of energy deficiency on athlete health by addressing the quality of the underlying science, the strengths and limitations of each model, and highlighting areas where future research is needed to advance the field. With the health and wellness of athletes and exercising individuals as the overarching priority, we conclude with specific steps that will help focus future research on the Female and Male Athlete Triad and RED-S, and encourage all researchers, clinicians, and practitioners to collaborate to support the common goal of promoting the highest quality science and evidence-based medicine in pursuit of the advancement of athletes' health, well-being, and performance.