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Golubjatnikov M, Walker A. Endurance Sporting Events. Emerg Med Clin North Am 2024; 42:581-596. [PMID: 38925776 DOI: 10.1016/j.emc.2024.02.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2024]
Abstract
Endurance sports encompass a broad range of events from marathons and triathlons to ultramarathons, long-distance cycling, skiing, and swimming. As these events have experienced a surge in popularity, we have a greater need to understand the associated medical risks. This article reviews the history of endurance races, reviews the most critical and common causes of cardiovascular, heat, electrolyte, and musculoskeletal injuries/illnesses, and discusses considerations for medical directors/personnel associated with such events.
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Affiliation(s)
- Matt Golubjatnikov
- St Joseph's Medical Center, 1800 N California Street, Stockton, CA 95204, USA
| | - Anne Walker
- St Joseph's Medical Center, 1800 N California Street, Stockton, CA 95204, USA.
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Tiemeier L, Nikolaidis PT, Chlíbková D, Wilhelm M, Thuany M, Weiss K, Knechtle B. Ultra-Cycling- Past, Present, Future: A Narrative Review. SPORTS MEDICINE - OPEN 2024; 10:48. [PMID: 38679655 PMCID: PMC11056358 DOI: 10.1186/s40798-024-00715-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Accepted: 04/06/2024] [Indexed: 05/01/2024]
Abstract
BACKGROUND Ultra-endurance events are gaining popularity in multiple exercise disciplines, including cycling. With increasing numbers of ultra-cycling events, aspects influencing participation and performance are of interest to the cycling community. MAIN BODY The aim of this narrative review was, therefore, to assess the types of races offered, the characteristics of the cyclists, the fluid and energy balance during the race, the body mass changes after the race, and the parameters that may enhance performance based on existing literature. A literature search was conducted in PubMed, Scopus, and Google Scholar using the search terms 'ultracycling', 'ultra cycling', 'ultra-cycling', 'ultra-endurance biking', 'ultra-bikers' and 'prolonged cycling'. The search yielded 948 results, of which 111 were relevant for this review. The studies were classified according to their research focus and the results were summarized. The results demonstrated changes in physiological parameters, immunological and oxidative processes, as well as in fluid and energy balance. While the individual race with the most published studies was the Race Across America, most races were conducted in Europe, and a trend for an increase in European participants in international races was observed. Performance seems to be affected by characteristics such as age and sex but not by anthropometric parameters such as skin fold thickness. The optimum age for the top performance was around 40 years. Most participants in ultra-cycling events were male, but the number of female athletes has been increasing over the past years. Female athletes are understudied due to their later entry and less prominent participation in ultra-cycling races. A post-race energy deficit after ultra-cycling events was observed. CONCLUSION Future studies need to investigate the causes for the observed optimum race age around 40 years of age as well as the optimum nutritional supply to close the observed energy gap under consideration of the individual race lengths and conditions. Another research gap to be filled by future studies is the development of strategies to tackle inflammatory processes during the race that may persist in the post-race period.
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Affiliation(s)
- Lucas Tiemeier
- Centre for Rehabilitation & Sports Medicine, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
| | | | - Daniela Chlíbková
- Centre of Sports Activities, Brno University of Technology, 61669, Brno, Czech Republic
| | - Matthias Wilhelm
- Centre for Rehabilitation & Sports Medicine, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
| | | | - Katja Weiss
- Institute of Primary Care, University of Zurich, Zurich, Switzerland
| | - Beat Knechtle
- Institute of Primary Care, University of Zurich, Zurich, Switzerland.
- Medbase St. Gallen Am Vadianplatz, Vadianstrasse 26, 9001, St. Gallen, Switzerland.
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Martín-Rodríguez A, Belinchón-deMiguel P, Rubio-Zarapuz A, Tornero-Aguilera JF, Martínez-Guardado I, Villanueva-Tobaldo CV, Clemente-Suárez VJ. Advances in Understanding the Interplay between Dietary Practices, Body Composition, and Sports Performance in Athletes. Nutrients 2024; 16:571. [PMID: 38398895 PMCID: PMC10892519 DOI: 10.3390/nu16040571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 02/15/2024] [Accepted: 02/16/2024] [Indexed: 02/25/2024] Open
Abstract
The dietary practices of athletes play a crucial role in shaping their body composition, influencing sports performance, training adaptations, and overall health. However, despite the widely acknowledged significance of dietary intake in athletic success, there exists a gap in our understanding of the intricate relationships between nutrition, body composition, and performance. Furthermore, emerging evidence suggests that many athletes fail to adopt optimal nutritional practices, which can impede their potential achievements. In response, this Special Issue seeks to gather research papers that delve into athletes' dietary practices and their potential impacts on body composition and sports performance. Additionally, studies focusing on interventions aimed at optimizing dietary habits are encouraged. This paper outlines the key aspects and points that will be developed in the ensuing articles of this Special Issue.
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Affiliation(s)
- Alexandra Martín-Rodríguez
- Faculty of Sports Sciences, Universidad Europea de Madrid, 28670 Villaviciosa de Odón, Spain; (A.M.-R.); (A.R.-Z.); (V.J.C.-S.)
| | - Pedro Belinchón-deMiguel
- Faculty of Biomedical and Health Sciences, Department of Nursing and Nutrition, Universidad Europea de Madrid, 28670 Villaviciosa de Odón, Spain;
| | - Alejandro Rubio-Zarapuz
- Faculty of Sports Sciences, Universidad Europea de Madrid, 28670 Villaviciosa de Odón, Spain; (A.M.-R.); (A.R.-Z.); (V.J.C.-S.)
| | - Jose Francisco Tornero-Aguilera
- Faculty of Sports Sciences, Universidad Europea de Madrid, 28670 Villaviciosa de Odón, Spain; (A.M.-R.); (A.R.-Z.); (V.J.C.-S.)
| | - Ismael Martínez-Guardado
- Faculty of Health Sciences, Camilo José Cela University, C. Castillo de Alarcón, 49, Villafranca del Castillo, 28692 Madrid, Spain;
| | | | - Vicente Javier Clemente-Suárez
- Faculty of Sports Sciences, Universidad Europea de Madrid, 28670 Villaviciosa de Odón, Spain; (A.M.-R.); (A.R.-Z.); (V.J.C.-S.)
- Grupo de Investigación en Cultura, Educación y Sociedad, Universidad de la Costa, Barranquilla 080002, Colombia
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Inamura N, Taniguchi H, Yoshida S, Nishioka M, Ishihara K. A comparative observational study of carbohydrate intake and continuous blood glucose levels in relation to performance in ultramarathon. Sci Rep 2024; 14:1089. [PMID: 38212465 PMCID: PMC10784534 DOI: 10.1038/s41598-023-51048-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 12/29/2023] [Indexed: 01/13/2024] Open
Abstract
Ultra-endurance events have gained global participation, whereas the critical factors of competition results remain to be well elucidated. This study used a nutritional approach to evaluate the association of competition results with carbohydrate intake and blood glucose control during a 100-mile ultramarathon. This observational study was conducted in the 2021 LAKE BIWA 100, which covered 100 miles (169 km) and 10,500 m elevation. The course was divided into 9 segments by aid station. According to the competition results, 22 participants (18 men and 4 women) were divided into higher finishers (n = 7), lower finishers (n = 9), and non-finishers (n = 6). The participants self-recorded their overall dietary intake throughout the race. Glucose levels were monitored every 15 min by a flash glucose monitoring system. Running speed in each segment was standardized to the average of the top five finishers for each gender. Among finishers, the carbohydrate intakes were significantly higher in the higher finishers than in the lower finishers during overall segments, especially in the first half of the race (p < 0.05). There was a significant positive correlation between running speed and carbohydrate intake in the lower finishers (rho = 0.700, p = 0.036). Two-way ANOVA analysis revealed that lowering glucose levels in each segment were more frequently observed in the lower finishers compared to the higher finishers (p = 0.012). Compared to the higher finishers, the lower finishers exhibited significantly greater fluctuations (⊿highest-lowest) in glucose levels (p < 0.001). The fluctuations in glucose levels were significantly and negatively correlated with the running speed of the finishers (rho = - 0.612, p = 0.012). Faster runners consume high amounts of carbohydrates and maintain glucose levels during the 100-mile ultramarathon on the trail, especially at the beginning. Lowering and fluctuating glucose levels during the race are associated with lower running speed in endurance athletes.
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Affiliation(s)
- Naho Inamura
- Faculty of Agriculture, Ryukoku University, Shiga, 520-2194, Japan
| | - Hirokazu Taniguchi
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto, Japan
| | - Shiori Yoshida
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto, Japan
| | - Masato Nishioka
- Faculty of Agriculture, Ryukoku University, Shiga, 520-2194, Japan
| | - Kengo Ishihara
- Faculty of Agriculture, Ryukoku University, Shiga, 520-2194, Japan.
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Jiménez-Alfageme R, Álvarez J, Garbisu-Hualde A, Romero-García D, Giménez-Monzó D, Sospedra I, Ausó E, Martínez-Sanz JM. Are the Dietary-Nutritional Recommendations Met? Analysis of Intake in Endurance Competitions. Nutrients 2024; 16:189. [PMID: 38257082 PMCID: PMC10820672 DOI: 10.3390/nu16020189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 12/29/2023] [Accepted: 12/31/2023] [Indexed: 01/24/2024] Open
Abstract
BACKGROUND In recent decades the number of endurance events has increased, as well as the number of athletes participating in them. Adequate nutritional and water planning is essential to maintain optimal sports performance and to reduce the incidence of gastrointestinal problems. The main objective of this study is to determine the dietary intake and compliance with nutritional recommendations of athletes in two endurance competitions, as well as to assess the incidence of gastrointestinal complaints. METHODS An observational and cross-sectional study was carried out on the consumption of liquids, food, and supplements in 42 triathletes and mountain runners (MRs) participating in a Vi-Half-Gasteiz triathlon and the Ultra Sierra de Cazorla trail run. At the completion of the trials, participants completed a validated questionnaire (NIQEC). RESULTS The mean caloric intake during the test of the participants in this study was 192.17 kcal/h, while the mean carbohydrate intake was 43.67 g/h, the mean sodium intake was 267.43 mg/h, and the mean caffeine intake was 15.53 mg/h, with no significant differences between the two sports. The amount of liquids consumed by the participants was 421.21 mL/h, with no significant differences between the triathletes and MRs. As for gastrointestinal problems, it was observed that the participants presented gastrointestinal discomfort in 61.9% of the cases. CONCLUSIONS The intakes of energy, carbohydrates, water, sodium, and caffeine were lower than the current recommendations. There were no differences in the energy, carbohydrate, water, sodium, and caffeine intakes between the triathletes and mountain runners. Gastrointestinal problems showed a high prevalence in these athletes.
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Affiliation(s)
- Rubén Jiménez-Alfageme
- Physiotherapy Department, Faculty of Health Sciences, University of Gasteiz—EUNEIZ, 01013 Vitoria-Gasteiz, Spain;
| | - Javier Álvarez
- Estudis de Ciències de la Salut, Universitat Oberta de Catalunya, 08018 Barcelona, Spain;
| | - Arkaitz Garbisu-Hualde
- Physical Activity and Sport Sciences Departmnet, Faculty of Health Sciences, University of Gasteiz—EUNEIZ, 01013 Vitoria-Gasteiz, Spain;
| | | | - Daniel Giménez-Monzó
- Department of Community Nursing, Preventive Medicine and Public Health and History of Science Health, University of Alicante, 03690 Alicante, Spain;
| | - Isabel Sospedra
- Nursing Department, Faculty of Health Sciences, University of Alicante, 03690 Alicante, Spain;
| | - Eva Ausó
- Department of Optics, Pharmacology and Anatomy, Faculty of Sciences, University of Alicante, 03690 Alicante, Spain
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Messonnier LA. Physical Exercise or Activity and Energy Balance or Metabolism in the Context of Health and Diseases. Nutrients 2023; 15:4909. [PMID: 38068767 PMCID: PMC10708250 DOI: 10.3390/nu15234909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 11/17/2023] [Indexed: 12/18/2023] Open
Abstract
Regular long-lasting physical exercise demands a tremendous amount of metabolic energy [...].
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Affiliation(s)
- Laurent A. Messonnier
- Inter-University Laboratory of Human Movement Sciences, Department of Sport Sciences, University Savoie Mont Blanc, F-73000 Chambéry, France; ; Tel.: +33(0)-4-79-75-81-85
- Institut Universitaire de France (IUF), F-75231 Paris, France
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Ryan T, Daly E, Ryan L. Exploring the Nutrition Strategies Employed by Ultra-Endurance Athletes to Alleviate Exercise-Induced Gastrointestinal Symptoms-A Systematic Review. Nutrients 2023; 15:4330. [PMID: 37892406 PMCID: PMC10610183 DOI: 10.3390/nu15204330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/05/2023] [Accepted: 10/07/2023] [Indexed: 10/29/2023] Open
Abstract
(1) Background: Participation in ultra-endurance sports, particularly ultra-running, has increased over the previous three decades. These are accompanied by high energetic demands, which may be further exacerbated by extreme environmental conditions. Preparation is long-term, comprising of sufficient exercise management, supportive dietary habits, and nutritional intakes for optimal adaptations. Gastrointestinal symptoms are often cited as causing underperformance and incompletion of events. Though the majority do not pose serious long-term health risks, they may still arise. It has been suggested that the nutritional interventions employed by such athletes prior to, during, and after exercise have the potential to alter symptom incidence, severity, and duration. A summary of such interventions does not yet exist, making it difficult for relevant personnel to develop recommendations that simultaneously improve athletic performance by attenuating gastrointestinal symptoms. The aim of this research is to systematically review the literature investigating the effects of a nutrition intervention on ultra-endurance athletes exercise-induced gastrointestinal symptom incidence, severity, or duration. (2) Methods: A systematic review of the literature was conducted (PubMed, CINAHL, Web of Science, and Sports Discus) in January 2023 to investigate the effects of various nutrition interventions on ultra-endurance athletes' (regardless of irritable bowel syndrome diagnosis) exercise-induced gastrointestinal symptoms. Variations of key words such as "ultra-endurance", "gastrointestinal", and "nutrition" were searched. The risk of bias in each paper was assessed using the ADA quality criteria checklist. (3) Results: Of the seven eligible studies, one was a single field-based case study, while the majority employed a crossover intervention design. A total of n = 105 participants (n = 50 male; n = 55 female) were included in this review. Practicing a diet low in short-chain, poorly absorbed carbohydrates, known as fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAPs), as well as employing repetitive gut challenges of carbohydrates, remain the most promising of strategies for exercise-induced gastrointestinal symptom management. (4) Conclusion: Avoiding high-FODMAP foods and practicing repetitive gut challenges are promising methods to manage gastrointestinal symptoms. However, sample sizes are often small and lack supportive power calculations.
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Affiliation(s)
| | | | - Lisa Ryan
- Department of Sport, Exercise and Nutrition, School of Science and Computing, Atlantic Technological University, H91 T8NW Galway, Ireland; (T.R.); (E.D.)
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Burke LM, Ackerman KE, Heikura IA, Hackney AC, Stellingwerff T. Mapping the complexities of Relative Energy Deficiency in Sport (REDs): development of a physiological model by a subgroup of the International Olympic Committee (IOC) Consensus on REDs. Br J Sports Med 2023; 57:1098-1108. [PMID: 37752007 DOI: 10.1136/bjsports-2023-107335] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/20/2023] [Indexed: 09/28/2023]
Abstract
The 2023 International Olympic Committee (IOC) consensus statement on Relative Energy Deficiency in Sport (REDs) notes that exposure to low energy availability (LEA) exists on a continuum between adaptable and problematic LEA, with a range of potential effects on both health and performance. However, there is variability in the outcomes of LEA exposure between and among individuals as well as the specific manifestations of REDs. We outline a framework for a 'systems biology' examination of the effect of LEA on individual body systems, with the eventual goal of creating an integrated map of body system interactions. We provide a template that systematically identifies characteristics of LEA exposure (eg, magnitude, duration, origin) and a variety of moderating factors (eg, medical history, diet and training characteristics) that could exacerbate or attenuate the type and severity of impairments to health and performance faced by an individual athlete. The REDs Physiological Model may assist the diagnosis of underlying causes of problems associated with LEA, with a personalised and nuanced treatment plan promoting compliance and treatment efficacy. It could also be used in the strategic prevention of REDs by drawing attention to scenarios of LEA in which impairments of health and performance are most likely, based on knowledge of the characteristics of the LEA exposure or moderating factors that may increase the risk of harmful outcomes. We challenge researchers and practitioners to create a unifying and dynamic physiological model for each body system that can be continuously updated and mapped as knowledge is gained.
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Affiliation(s)
- Louise M Burke
- Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Victoria, Australia
| | - Kathryn E Ackerman
- Wu Tsai Female Athlete Program, Division of Sports Medicine, Boston Children's Hospital, Boston, Massachusetts, USA
- Neuroendocrine Unit, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Ida A Heikura
- Canadian Sport Institute Pacific, Victoria, British Columbia, Canada
- Exercise Science, Physical & Health Education, University of Victoria, Victoria, British Columbia, Canada
| | - Anthony C Hackney
- Department of Exercise & Sport Science, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Trent Stellingwerff
- Canadian Sport Institute Pacific, Victoria, British Columbia, Canada
- Exercise Science, Physical & Health Education, University of Victoria, Victoria, British Columbia, Canada
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Johnson KB, Connolly CP, Cho SP, Miller TK, Sallis RE, Hiller WDB. Clinical presentation of exercise-associated hyponatremia in male and female IRONMAN® triathletes over three decades. Scand J Med Sci Sports 2023; 33:1841-1849. [PMID: 37204065 DOI: 10.1111/sms.14401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 04/16/2023] [Accepted: 05/09/2023] [Indexed: 05/20/2023]
Abstract
PURPOSE Exercise-associated hyponatremia (EAH) is common in ultra-endurance events and severe cases are more common in females. The purpose of this paper is to compare the clinical presentation of EAH between male and female triathletes in ultra-endurance competitions. METHODS Medical records with sodium concentrations (n = 3138) from the IRONMAN® World Championships over the timeframe of 1989-2019 were reviewed for both male (n = 2253) and female (n = 885) competitors. Logistic regression was used to explore the relationships between sex, sodium concentration, and various clinical presentations. RESULTS When comparing male and female triathletes, clinical variables found to have a different relationship with sodium concentration include altered mental status (inversely related in males and not related in females), abdominal pain, muscle cramps, hypotension, and tachycardia (directly related in males and not related in females), and vomiting and hypokalemia (not related in males and inversely related in females). Overall, males lost significantly more weight than females, and notably, approximately half of all athletes were dehydrated and lost weight. CONCLUSIONS Altered mental status, vomiting, abdominal pain, muscle cramps, hypotension, tachycardia, and hyperkalemia appear to present differently between sexes when comparing hyponatremic to eunatremic athletes. Although overhydration is the most common etiology of hypervolemic hyponatremia, hypovolemic hyponatremia comprises a significant amount of hyponatremic triathletes. Further understanding of how EAH presents helps athletes and medical professionals identify it early and prevent life-threatening complications.
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Affiliation(s)
- Kasey B Johnson
- Elson S. Floyd College of Medicine, Washington State University, Spokane, WA, USA
| | | | - Stephanie P Cho
- College of Education, Washington State University, Pullman, WA, USA
| | - Thomas K Miller
- Virginia Tech Carilion School of Medicine, Roanoke, Virginia, USA
| | - Robert E Sallis
- UC Riverside School of Medicine, Riverside, California, USA
- Kaiser Permanente, Sports Medicine, Fontana, California, USA
| | - W Douglas B Hiller
- Elson S. Floyd College of Medicine, Washington State University, Spokane, WA, USA
- John A. Burns College of Medicine at University of Hawai'i, Honolulu, Hawaii, USA
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Kosendiak A, Król M, Ligocka M, Kepinska M. Eating habits and nutritional knowledge among amateur ultrarunners. Front Nutr 2023; 10:1137412. [PMID: 37497055 PMCID: PMC10365969 DOI: 10.3389/fnut.2023.1137412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 06/23/2023] [Indexed: 07/28/2023] Open
Abstract
Introduction Many studies concerning the diet of physically active people refer to individuals who run; however, the importance of nutrition in professional and amateur sports plays a different role. This study aimed to evaluate the nutritional behavior and knowledge of amateur ultrarunners. This study involved a group of 308 respondents (89 women and 219 men) aged 18 -65. It investigated the influence of the level of knowledge about nutrition, gender, education, and smoking on dietary food habits and eating frequency. Methods The KomPAN questionnaire was used to determine the dietary habits, diet quality, lifestyle, and nutrition knowledge of ultramarathon runners. The nutrition knowledge influenced the eating habits and frequency of specific meals expressed as the Healthy Diet Index-10 (HDI-10) and Unhealthy Diet Index-14 (UDI-14). Results In women with sufficient knowledge about nutrition, lower HDI-10 scores were observed compared to those with a good level of knowledge, while men did not show a similar relationship. However, the effect of smoking on the frequency of food intake in men was noted. Interestingly, male smokers had a lower UDI-14 score than non-smokers. Depending on the level of knowledge, female and male ultrarunners more often or less frequently used selected food products. In turn, no effect of education on the frequency of consumption of specific foods was observed. Discussion Such different results are most likely caused by the specificity of the study group, which consisted of amateur runners. Additionally, the study looked at general eating habits, not those employed when preparing for marathons. In the future, more respondents should be surveyed, also taking into account nutrition during training.
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Affiliation(s)
- Aureliusz Kosendiak
- Department of Physical Education and Sport, Wroclaw Medical University, Wrocław, Poland
| | - Magdalena Król
- Department of Pharmaceutical Biochemistry, Division of Biomedical and Environmental Analyses, Faculty of Pharmacy, Wroclaw Medical University, Wrocław, Poland
| | - Marta Ligocka
- Students Scientific Association, Division of Biomedical and Environmental Analyses, Faculty of Pharmacy, Wroclaw Medical University, Wrocław, Poland
| | - Marta Kepinska
- Department of Pharmaceutical Biochemistry, Division of Biomedical and Environmental Analyses, Faculty of Pharmacy, Wroclaw Medical University, Wrocław, Poland
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Jiménez-Alfageme R, Martínez-Sanz JM, Romero-García D, Giménez-Monzo D, Hernández Aparicio S, Sanchez-Oliver AJ, Sospedra I. Do Spanish Triathletes Consume Sports Supplements According to Scientific Evidence? An Analysis of the Consumption Pattern According to Sex and Level of Competition. Nutrients 2023; 15:nu15061330. [PMID: 36986060 PMCID: PMC10058453 DOI: 10.3390/nu15061330] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 03/01/2023] [Accepted: 03/06/2023] [Indexed: 03/11/2023] Open
Abstract
Background: The use of sports supplements (SS) to improve sports performance is very common in athletes. In the case of triathletes, the physiological characteristics of the sport may require the use of certain SS. Although the consumption of SS is widespread in this sport, very few studies have investigated it thus far. The aim is to analyze the pattern of SS consumption by triathletes according to sex and the competitive level. Methodology: This is a descriptive cross-sectional study on the consumption and habitual use of SS of 232 Spanish-federated triathletes. Data were collected through a validated questionnaire. Results: Overall, 92.2% of the athletes consumed SS, but no significant differences were found in terms of competition level or sex. Yet, significant differences were found regarding the level of competition for total SS (p = 0.021), the total number of Group A supplements from the AIS classification (p = 0.012), and for the ergogenic aids (p = 0.003). The most-consumed SS were bars, sports drinks, sports gels, and caffeine (83.6%, 74.1%, 61.2%, and 46.6%, respectively). Conclusions: The consumption of SS by triathletes is high, and the number of SS consumed rises from the regional to the national and international levels. The four SS most consumed were included in category A of the AIS (greatest scientific evidence).
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Affiliation(s)
- Rubén Jiménez-Alfageme
- Faculty of Health Sciences, University of Alicante, 03690 Alicante, Spain
- Food and Nutrition Research Group (ALINUT), University of Alicante, 03690 Alicante, Spain
- Physiotherapy Department, Faculty of Health Sciences, European University of Gasteiz—EUNEIZ, 01013 Vitoria-Gasteiz, Spain
| | - José Miguel Martínez-Sanz
- Food and Nutrition Research Group (ALINUT), University of Alicante, 03690 Alicante, Spain
- Nursing Department, Faculty of Health Sciences, University of Alicante, 03690 Alicante, Spain
- Correspondence:
| | - David Romero-García
- Faculty of Health Sciences, University of Alicante, 03690 Alicante, Spain
- Food and Nutrition Research Group (ALINUT), University of Alicante, 03690 Alicante, Spain
| | - Daniel Giménez-Monzo
- Food and Nutrition Research Group (ALINUT), University of Alicante, 03690 Alicante, Spain
- Department of Community Nursing, Preventive Medicine and Public Health and History of Science Health, University of Alicante, 03690 Alicante, Spain
| | | | - Antonio Jesús Sanchez-Oliver
- Food and Nutrition Research Group (ALINUT), University of Alicante, 03690 Alicante, Spain
- Departamento de Motricidad Humana y Rendimiento Deportivo, Facultad de Ciencias de la Educación, Universidad de Sevilla, 41004 Sevilla, Spain
| | - Isabel Sospedra
- Food and Nutrition Research Group (ALINUT), University of Alicante, 03690 Alicante, Spain
- Nursing Department, Faculty of Health Sciences, University of Alicante, 03690 Alicante, Spain
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Tidmas V, Brazier J, Bottoms L, Muniz D, Desai T, Hawkins J, Sridharan S, Farrington K. Ultra-Endurance Participation and Acute Kidney Injury: A Narrative Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:16887. [PMID: 36554767 PMCID: PMC9779673 DOI: 10.3390/ijerph192416887] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 12/11/2022] [Accepted: 12/13/2022] [Indexed: 06/17/2023]
Abstract
Increasingly popular, ultra-endurance participation exposes athletes to extremely high levels of functional and structural damage. Ultra-endurance athletes commonly develop acute kidney injury (AKI) and other pathologies harmful to kidney health. There is strong evidence that non-steroidal anti-inflammatory drugs, common amongst ultra-athletes, is linked to increased risk and severity of AKI and potentially ischaemic renal injury, i.e., acute tubular necrosis. Ultra-endurance participation also increases the risk of exertional rhabdomyolysis, exercise-associated hyponatremia, and gastrointestinal symptoms, interlinked pathologies all with potential to increase the risk of AKI. Hydration and fuelling both also play a role with the development of multiple pathologies and ultimately AKI, highlighting the need for individualised nutritional and hydration plans to promote athlete health. Faster athletes, supplementing nitrates, and being female also increase the risk of developing AKI in this setting. Serum creatinine criteria do not provide the best indicator for AKI for ultra-athletes therefore further investigations are needed to assess the practicality and accuracy of new renal biomarkers such as neutrophil gelatinase-associated lipocalin (NGAL). The potential of recurring episodes of AKI provide need for further research to assess the longitudinal renal health impact of ultra-participation to provide appropriate advice to athletes, coaches, medical staff, and event organisers.
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Affiliation(s)
- Victoria Tidmas
- Department of Psychology, Sport, and Geography, De Havilland Campus, University of Hertfordshire, Hatfield AL10 9EU, UK
| | - Jon Brazier
- Department of Psychology, Sport, and Geography, De Havilland Campus, University of Hertfordshire, Hatfield AL10 9EU, UK
| | - Lindsay Bottoms
- Department of Psychology, Sport, and Geography, De Havilland Campus, University of Hertfordshire, Hatfield AL10 9EU, UK
| | - Daniel Muniz
- Department of Psychology, Sport, and Geography, De Havilland Campus, University of Hertfordshire, Hatfield AL10 9EU, UK
| | - Terun Desai
- Department of Psychology, Sport, and Geography, De Havilland Campus, University of Hertfordshire, Hatfield AL10 9EU, UK
| | - Janine Hawkins
- Centre for Health Services and Clinical Research, De Havilland Campus, University of Hertfordshire, Hatfield AL10 9EU, UK
| | - Sivakumar Sridharan
- Centre for Health Services and Clinical Research, De Havilland Campus, University of Hertfordshire, Hatfield AL10 9EU, UK
- Renal Unit, Lister Hospital, East and North Herts Trust, Stevenage SG1 4AB, UK
| | - Ken Farrington
- Centre for Health Services and Clinical Research, De Havilland Campus, University of Hertfordshire, Hatfield AL10 9EU, UK
- Renal Unit, Lister Hospital, East and North Herts Trust, Stevenage SG1 4AB, UK
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Running for Your Life: Metabolic Effects of a 160.9/230 km Non-Stop Ultramarathon Race on Body Composition, Inflammation, Heart Function, and Nutritional Parameters. Metabolites 2022; 12:metabo12111138. [DOI: 10.3390/metabo12111138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 11/15/2022] [Accepted: 11/16/2022] [Indexed: 11/22/2022] Open
Abstract
Moderate endurance exercise leads to an improvement in cardiovascular performance, stress resilience, and blood function. However, the influence of chronic endurance exercise over several hours or days is still largely unclear. We examined the influence of a non-stop 160.9/230 km ultramarathon on body composition, stress/cardiac response, and nutrition parameters. Blood samples were drawn before (pre) and after the race (post) and analyzed for ghrelin, insulin, irisin, glucagon, cortisol, kynurenine, neopterin, and total antioxidant capacity. Additional measurements included heart function by echocardiography, nutrition questionnaires, and body impedance analyses. Of the 28 included ultra-runners (7f/21m), 16 participants dropped out during the race. The remaining 12 finishers (2f/10m) showed depletion of antioxidative capacities and increased inflammation/stress (neopterin/cortisol), while energy metabolism (insulin/glucagon/ghrelin) remained unchanged despite a high negative energy balance. Free fat mass, protein, and mineral content decreased and echocardiography revealed a lower stroke volume, left end diastolic volume, and ejection fraction post race. Optimizing nutrition (high-density protein-rich diet) during the race may attenuate the observed catabolic and inflammatory effects induced by ultramarathon running. As a rapidly growing discipline, new strategies for health prevention and extensive monitoring are needed to optimize the athletes’ performance.
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Motevalli M, Wagner KH, Leitzmann C, Tanous D, Wirnitzer G, Knechtle B, Wirnitzer K. Female Endurance Runners Have a Healthier Diet than Males-Results from the NURMI Study (Step 2). Nutrients 2022; 14:nu14132590. [PMID: 35807768 PMCID: PMC9268557 DOI: 10.3390/nu14132590] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 06/17/2022] [Accepted: 06/21/2022] [Indexed: 12/14/2022] Open
Abstract
Sex has been recognized to be an important indicator of physiological, psychological, and nutritional characteristics among endurance athletes. However, there are limited data addressing sex-based differences in dietary behaviors of distance runners. The aim of the present study is to explore the sex-specific differences in dietary intake of female and male distance runners competing at >10-km distances. From the initial number of 317 participants, 211 endurance runners (121 females and 90 males) were selected as the final sample after a multi-level data clearance. Participants were classified to race distance (10-km, half-marathon, marathon/ultra-marathon) and type of diet (omnivorous, vegetarian, vegan) subgroups. An online survey was conducted to collect data on sociodemographic information and dietary intake (using a comprehensive food frequency questionnaire with 53 food groups categorized in 14 basic and three umbrella food clusters). Compared to male runners, female runners had a significantly greater intake in four food clusters, including “beans and seeds”, “fruit and vegetables”, “dairy alternatives”, and “water”. Males reported higher intakes of seven food clusters, including “meat”, “fish”, “eggs”, “oils”, “grains”, “alcohol”, and “processed foods”. Generally, it can be suggested that female runners have a tendency to consume healthier foods than males. The predominance of females with healthy dietary behavior can be potentially linked to the well-known differences between females and males in health attitudes and lifestyle patterns.
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Affiliation(s)
- Mohamad Motevalli
- Department of Sport Science, Leopold-Franzens University of Innsbruck, 6020 Innsbruck, Austria; (M.M.); (D.T.)
- Department of Subject Didactics and Educational Research and Development, University College of Teacher Education Tyrol, 6010 Innsbruck, Austria
| | - Karl-Heinz Wagner
- Department of Nutritional Sciences, University of Vienna, 1090 Vienna, Austria;
| | - Claus Leitzmann
- Institute of Nutrition, University of Gießen, 35390 Gießen, Germany;
| | - Derrick Tanous
- Department of Sport Science, Leopold-Franzens University of Innsbruck, 6020 Innsbruck, Austria; (M.M.); (D.T.)
- Department of Subject Didactics and Educational Research and Development, University College of Teacher Education Tyrol, 6010 Innsbruck, Austria
| | | | - Beat Knechtle
- Institute of Primary Care, University of Zurich, 8091 Zurich, Switzerland;
- Medbase St. Gallen Am Vadianplatz, 9001 St. Gallen, Switzerland
| | - Katharina Wirnitzer
- Department of Sport Science, Leopold-Franzens University of Innsbruck, 6020 Innsbruck, Austria; (M.M.); (D.T.)
- Department of Subject Didactics and Educational Research and Development, University College of Teacher Education Tyrol, 6010 Innsbruck, Austria
- Research Center Medical Humanities, Leopold-Franzens University of Innsbruck, 6020 Innsbruck, Austria
- Correspondence: ; Tel.: +43-(650)-5901794
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15
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Effects of Sodium Intake on Health and Performance in Endurance and Ultra-Endurance Sports. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19063651. [PMID: 35329337 PMCID: PMC8955583 DOI: 10.3390/ijerph19063651] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 03/03/2022] [Accepted: 03/08/2022] [Indexed: 11/17/2022]
Abstract
The majority of reviews on sports nutrition issues focus on macronutrients, often omitting or paying less attention to substances such as sodium. Through the literature, it is clear that there are no reviews that focus entirely on the effects of sodium and in particular on endurance sports. Sodium intake, both at high and low doses, has been found to be associated with health and performance issues in athletes. Besides, there have been theories that an electrolyte imbalance, specifically sodium, contributes to the development of muscle cramps (EAMC) and hyponatremia (EAH). For this reason, it is necessary to create this systematic review, in order to report extensively on the role of sodium consumption in the population and more specifically in endurance and ultra-endurance athletes, the relationship between the amount consumed and the occurrence of pathological disorders, the usefulness of simultaneous hydration and whether a disturbance of this substance leads to EAH and EAMC. As a method of data collection, this study focused on exploring literature from 2000–2021. The search was conducted through the research engines PubMed and Scopus. In order to reduce the health and performance effects in endurance athletes, simultaneous emphasis should be placed on both sodium and fluid intake.
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16
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Galsworthy WJH, Carr JAJ, Hearn RP. Common Health Issues Encountered by Ultraendurance Ocean Rowers. Wilderness Environ Med 2022; 33:97-101. [PMID: 34998705 DOI: 10.1016/j.wem.2021.11.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 11/09/2021] [Accepted: 11/17/2021] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Ocean rowing is an extreme ultraendurance sport in which athletes push themselves to their mental and physical limits while rowing across an ocean. Limited academic attention has meant health issues facing this population are poorly understood. This report provides a descriptive analysis of the injuries and illnesses encountered by ocean rowers at sea and suggests potential preventative measures. METHODS Retrospective self-reported data were collected from ocean rowers via an online 29-question survey, classified by medical system, and totaled to produce a report of the most frequently encountered symptoms. RESULTS Seventy-one ocean rowers, accounting for 86 ocean rowing attempts, completed the survey. Dermatologic symptoms formed 52% (n=169) of all reported issues, followed by musculoskeletal injuries (14%; n=45), mental health symptoms (11%; n=36), gastrointestinal symptoms (5%; n=16), and neurologic symptoms (2%). Gluteal pressure sores were the most common dermatologic symptoms (24%; n=40), hallucinations the most common mental health symptoms (69%; n=25), hand and finger issues the most reported musculoskeletal problems (36%; n=16); vomiting (38%) and headaches (50%) were the most common gastrointestinal and neurologic issues, respectively. Seasickness was reported in 42% of expeditions (n=33). CONCLUSIONS This report presents the physiological, mental, and medical challenges facing ocean rowers. Dermatologic and musculoskeletal issues were most common and varied greatly in severity. Over 90% of reported infections occurred as a dermatologic complaint, demonstrating the importance of preventative measures such as hygiene and wound care. Continued work with a larger population is required to further understand the physiological stress and medical complaints associated with transoceanic rowing.
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Affiliation(s)
- William J H Galsworthy
- Guy's, King's, & St Thomas' School of Medical Education, King's College London, London, UK
| | - James A J Carr
- Guy's, King's, & St Thomas' School of Medical Education, King's College London, London, UK
| | - Russell P Hearn
- Guy's, King's, & St Thomas' School of Medical Education, King's College London, London, UK.
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17
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The Impact of Marathons on the Recovery of Heart Rate and Blood Pressure in Non-Professional Male Marathoners’ (≥45 Years). Medicina (B Aires) 2021; 57:medicina57121346. [PMID: 34946292 PMCID: PMC8703998 DOI: 10.3390/medicina57121346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 11/27/2021] [Accepted: 12/08/2021] [Indexed: 11/25/2022] Open
Abstract
Background and Objectives: Physical activity has a positive impact on health, and the participation in exercise and sports, including marathons, has increased in popularity. This kind of sport requires extreme endurance, which can cause different health problems and even lead to death. Participants without sufficient preparation and, in particular, men 45 years of age and older belong to a high risk group. The aim of this study was to determine the impact of marathons and cofactors associated with marathons on the recovery of heart rate (HR) and blood pressure (BP) of non-professional ≥ 45 years old male marathoners. Materials andMethods: A total of 136 ≥ 45 year old, non-professional (amateur marathoner), male participants were recruited. Data collection involved a questionnaire, body composition measures, and BP and HR results before and after finishing the marathon. Descriptive data, t-test, Mann–Whitney or χ2 test, and Pearson’s correlation were applied. Results: Participants (skiing n = 81, cycling n = 29, running n = 26; mean age 51.7 ± 7.1 years old) had previously attended a median of 35 (IQR 17.5–66) marathons and travelled 2111.5 (IQR 920–4565) km. Recovery of HR and BP after finishing and recovery time was insufficient and not associated with marathon preparation. Running was the most burdensome for HR, and cycling was most taxing for BP. Chronic diseases did not influence participation in the marathon. Conclusions: The preparation for the marathon was mainly sufficient, but recovery after the marathon was worrisome. Marathons are demanding for ≥45 year old males and may be too strenuous an activity that has deleterious effects on health.
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18
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Katharina W, Mohamad M, Derrick T, Martina G, Gerold W, Claus L, Lee H, Thomas R, Beat K. Supplement intake in half-marathon, (ultra-)marathon and 10-km runners - results from the NURMI study (Step 2). J Int Soc Sports Nutr 2021; 18:64. [PMID: 34579746 PMCID: PMC8477506 DOI: 10.1186/s12970-021-00460-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 09/06/2021] [Indexed: 12/13/2022] Open
Abstract
The primary nutritional challenge facing endurance runners is meeting the nutrient requirements necessary to optimize the performance and recovery of prolonged training sessions. Supplement intake is a commonly used strategy by elite and recreational distance runners to meet nutritional recommendations. This study was conducted to investigate the patterns of supplement intake among different groups of distance runners and the potential association between supplement intake and sex, age, running and racing experiences.In a cross-sectional design, from a total of 317 runners participating in this survey, 119 distance runners were involved in the final sample after data clearance, assigned into three groups of 10-km runners (n = 24), half-marathoners (n = 44), and (ultra-)marathoners (n = 51). Personal characteristics, training and racing experiences, as well as patterns of supplement intake, including type, frequency, and dosage, were evaluated by questionnaire. Food Frequency Questionnaire was implemented to assess macronutrient intake. ANOVA and logistic regression were used for statistical analysis.While 50 % of total distance runners reported consuming supplements regularly, no differences between distance groups in consumption of carbohydrate/protein, mineral, or vitamin supplements were observed (p > 0.05). In addition, age, sex, running and racing experience showed no significant association with supplement intake (p > 0.05). Vitamin supplements had the highest intake rate in runners by 43 % compared to minerals (34 %) and carbohydrate/protein supplements (19 %).The present findings provide a window into the targeted approaches of long-distance runners as well as their coaches and sport nutrition specialists when applying and suggesting sustainable nutritional strategies for training and competition.Trial registration: ISRCTN73074080. Retrospectively registered 12th June 2015.
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Affiliation(s)
- Wirnitzer Katharina
- Department of Subject Didactics and Educational Research and Development, University College of Teacher Education Tyrol, Innsbruck, Austria
- Department of Sport Science, University of Innsbruck, Innsbruck, Austria
- Life and Health Science Cluster Tirol, Subcluster Health/Medicine/Psychology, Innsbruck, Austria
- Research Center Medical Humanities, Leopold-Franzens University of Innsbruck, Innsbruck, Austria
| | - Motevalli Mohamad
- Department of Sport Science, University of Innsbruck, Innsbruck, Austria
- Faculty of Physical Education and Sports Sciences, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Tanous Derrick
- Department of Sport Science, University of Innsbruck, Innsbruck, Austria
| | - Gregori Martina
- Department of Nutritional Sciences, University of Vienna, Vienna, Austria
| | | | - Leitzmann Claus
- Institute of Nutrition, University of Gießen, Gießen, Germany
| | - Hill Lee
- Divison of Gastroenterology and Nutrition, Department of Pediatrics, McMaster University, Hamilton, Canada
| | - Rosemann Thomas
- Institute of Primary Care, University of Zurich, Zurich, Switzerland
| | - Knechtle Beat
- Institute of Primary Care, University of Zurich, Zurich, Switzerland
- Medbase St. Gallen Am Vadianplatz, St. Gallen, Switzerland
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19
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Scholz H, Sousa CV, Baumgartner S, Rosemann T, Knechtle B. Changes in Sex Difference in Time-Limited Ultra-Cycling Races from 6 Hours to 24 Hours. ACTA ACUST UNITED AC 2021; 57:medicina57090923. [PMID: 34577846 PMCID: PMC8469116 DOI: 10.3390/medicina57090923] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 08/25/2021] [Accepted: 08/26/2021] [Indexed: 11/16/2022]
Abstract
Background and objective: Existing research shows that the sex differences in distance-limited ultra-cycling races decreased with both increasing race distance and increasing age. It is unknown, however, whether the sex differences in time-limited ultra-cycling races will equally decrease with increasing race distance and age. This study aimed to examine the sex differences regarding performance for time-limited ultra-cycling races (6, 12, and 24 h). Methods: Data were obtained from the online database of the Ultra-Cycling Marathon Association (UMCA) of time-limited ultra-cycling races (6, 12, and 24 h) from the years 1983–2019. A total of 18,241 race results were analyzed to compare cycling speed between men and women by calendar year, age group (<29; 30–39; 40–49; 50–59; 60–69; >70 years), and race duration. Results: The participation of both men (85.1%) and women (14.9%) increased between 1983 and 2019. The age of peak performance was between 40 and 59 years for men and between 30 and 59 years for women. Between 2000 and 2019, more men (63.1% of male participants and 52.2% of female participants) competed in 24 h races. In the 24 h races, the sex difference decreased significantly in all age groups. Men cycled 9.6% faster than women in the 12 h races and 4% faster in the 24 h races. Both women and men improved their performance significantly across the decades. Between 2000 and 2019, the improvement in the 24 h races were 15.6% for men and 21.9% for women. Conclusion: The sex differences in cycling speed decreased between men and women with increasing duration of ultra-cycling races and with increasing age. Women showed a greater performance improvement than men in the last 20 years. The average cycling speed of men and women started to converge in the 24 h races.
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Affiliation(s)
- Heike Scholz
- Institute of Primary Care, University of Zurich, 8091 Zurich, Switzerland; (H.S.); (T.R.)
| | - Caio Victor Sousa
- Health Technology Lab, Bouvé College of Health Sciences, Northeastern University, Boston, MA 02115, USA;
| | | | - Thomas Rosemann
- Institute of Primary Care, University of Zurich, 8091 Zurich, Switzerland; (H.S.); (T.R.)
| | - Beat Knechtle
- Institute of Primary Care, University of Zurich, 8091 Zurich, Switzerland; (H.S.); (T.R.)
- Medbase St. Gallen Am Vadianplatz, 9001 St. Gallen, Switzerland;
- Correspondence: author:
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20
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Raghunandan A, Charnoff JN, Matsuwaka ST. The Epidemiology, Risk Factors, and Nonsurgical Treatment of Injuries Related to Endurance Running. Curr Sports Med Rep 2021; 20:306-311. [PMID: 34099608 DOI: 10.1249/jsr.0000000000000852] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ABSTRACT Running is a popular form of exercise that is easily accessible to various populations; endurance running, defined as distances beyond 5 km, continues to grow within the sport. Endurance running-related injuries are common in the lower extremities and are primarily overuse related. A multitude of risk factors for injury exist, including extrinsic factors, such as running distance and frequency, and intrinsic factors, such as biomechanics and nutrition status. Training and rehabilitation techniques vary with a general focus on strengthening and gradual increase in activity, but evidence is mixed, and it is difficult to generalize programs across different running populations. Management of specific running groups, including youth runners, is an area in which additional research is needed. New treatments, such as orthobiologics and wearable technology, have promising potential to optimize performance and recovery and minimize injury. However, they need to be further evaluated with high-quality studies.
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21
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Wirnitzer K, Motevalli M, Tanous DR, Gregori M, Wirnitzer G, Leitzmann C, Rosemann T, Knechtle B. Sex Differences in Supplement Intake in Recreational Endurance Runners-Results from the NURMI Study (Step 2). Nutrients 2021; 13:nu13082776. [PMID: 34444935 PMCID: PMC8402241 DOI: 10.3390/nu13082776] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 08/03/2021] [Accepted: 08/11/2021] [Indexed: 12/16/2022] Open
Abstract
It has been well-documented that female and male athletes differ in many physiological and psychological characteristics related to endurance performance. This sex-based difference appears to be associated with their nutritional demands including the patterns of supplement intake. However, there is a paucity of research addressing the sex differences in supplement intake amongst distance runners. The present study aimed to investigate and compare supplement intake between female and male distance runners (10 km, half-marathon, (ultra-)marathon) and the potential associations with diet type and race distance. A total of 317 runners participated in an online survey, and 220 distance runners (127 females and 93 males) made up the final sample after a multi-stage data clearance. Participants were also assigned to dietary (omnivorous, vegetarian, vegan) and race distance (10-km, half-marathon, marathon/ultra-marathon) subgroups. Sociodemographic characteristics and the patterns of supplement intake including type, frequency, dosage, and brands were collected using a questionnaire. One-way ANOVA and logistic regression were used for data analysis. A total of 54.3% of female runners and 47.3% male runners reported consuming supplements regularly. The frequency of supplement intake was similar between females and males (generally or across dietary and distance subgroups). There was no significant relationship for sex alone or sex interactions with diet type and race distance on supplement intake (p < 0.05). However, a non-significant higher intake of vitamin and mineral (but not CHO/protein) supplements was reported by vegan and vegetarian (but not by omnivorous) females compared to their male counterparts. In summary, despite the reported findings, sex could not be considered as a strong modulator of supplement intake among different groups of endurance runners.
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Affiliation(s)
- Katharina Wirnitzer
- Department of Subject Didactics and Educational Research and Development, University College of Teacher Education Tyrol, 6010 Innsbruck, Austria;
- Department of Sport Science, University of Innsbruck, 6020 Innsbruck, Austria; (M.M.); (D.R.T.)
- Life and Health Science Cluster Tirol, Subcluster Health/Medicine/Psychology, 6020 Innsbruck, Austria
- Research Center Medical Humanities, Leopold-Franzens University of Innsbruck, 6020 Innsbruck, Austria
| | - Mohamad Motevalli
- Department of Sport Science, University of Innsbruck, 6020 Innsbruck, Austria; (M.M.); (D.R.T.)
- Faculty of Physical Education and Sports Sciences, Ferdowsi University of Mashhad, Mashhad 9177948979, Iran
| | - Derrick R. Tanous
- Department of Sport Science, University of Innsbruck, 6020 Innsbruck, Austria; (M.M.); (D.R.T.)
| | - Martina Gregori
- Department of Nutritional Sciences, University of Vienna, 1090 Vienna, Austria;
| | | | - Claus Leitzmann
- Institute of Nutrition, University of Gießen, 35390 Gießen, Germany;
| | - Thomas Rosemann
- Institute of Primary Care, University of Zurich, 8091 Zurich, Switzerland;
| | - Beat Knechtle
- Institute of Primary Care, University of Zurich, 8091 Zurich, Switzerland;
- Medbase St. Gallen Am Vadianplatz, 9001 St. Gallen, Switzerland
- Correspondence: ; Tel.: +41-(071)-226-9300
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22
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Supplement Intake in Recreational Vegan, Vegetarian, and Omnivorous Endurance Runners-Results from the NURMI Study (Step 2). Nutrients 2021; 13:nu13082741. [PMID: 34444901 PMCID: PMC8399632 DOI: 10.3390/nu13082741] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 08/05/2021] [Accepted: 08/06/2021] [Indexed: 12/14/2022] Open
Abstract
Nutrient deficiency is a common cause of underperformance in endurance athletes, and supplement intake is frequently considered compensatory for vegan and vegetarian athletes specifically. This study aimed to investigate the patterns of supplement intake among vegan, vegetarian, and omnivorous distance (>10 km) runners and its association with age, sex, and race distance. From a total of 317 runners who participated in an online survey, 220 distance runners (mean age: 38.5 years; mean BMI: 21.75 kg/m2) were selected for the final sample after data clearance and assigned to 100 omnivores, 40 vegetarians, or 80 vegans. Sociodemographic information, racing experience, and patterns of supplement intake, including type, frequency, dosage, etc., were collected using a questionnaire. Macronutrient intake was assessed using a food frequency questionnaire. ANOVA and logistic regression were used for data analysis. The prevalence of supplement intake was 51% for total runners and 72% among vegan runners. Age, sex, and race distance had no significant effect on the type of supplement intake (p > 0.05). Compared to omnivores and vegetarians, vegan runners reported consuming more vitamin (but not carbohydrate/protein or mineral) supplements (p < 0.05). Vitamin B12, magnesium, and multivitamin had the most prevalent use amongst micronutrient supplements. This study points to a central role for supplementary nutritional strategies in different groups of distance runners. The present findings may help future investigations by design to identify specific requirements of endurance runners when adhering to specific kinds of diet particularly plant-based diets.
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Ozdurak Singin RH, Duz S, Kiraz M. Cortical and Subcortical Brain Volume Alterations Following Endurance Running at 38.6 km and 119.2 km in Male Athletes. Med Sci Monit 2021; 27:e926060. [PMID: 34155188 PMCID: PMC8234558 DOI: 10.12659/msm.926060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Although several studies have shown that ultramarathon running causes severe physical and mental stress and harms organ systems, its effect on brain tissue remains unclear. The purpose of this study was to investigate the volumetric change of cortical and subcortical brain structures following 38.6-km and 119.8-km mountain races. MATERIAL AND METHODS A total of 23 healthy male runners (age, 49.05±5.99 years) were classified as short-trail (ST; n=9) and ultra-trail (UT; n=14) endurance running. Pre- and post-test scanning of brain tissue was performed by using a 3-Tesla magnetic resonance imaging (MRI). Pre- and post-race differences in cortical and subcortical volumes in the ST and UT groups were separately determined by Wilcoxon signed-rank test. RESULTS Cortical gray matter (GM) and cerebral GM volume significantly increased after the race in both ST and UT groups, whereas the volume of the thalamus, caudate, pallidus, and hippocampus significantly increased only in the UT group. Cerebrospinal fluid (CSF) and white-matter (WM) volumes did not change after endurance running and remained unaltered in both groups. CONCLUSIONS Endurance running has a site-specific acute effect on cortical and subcortical structures and may attenuate GM volume decrease in older adult male athletes. The increased volume of subcortical structures might be a response of physical exercise and additional physical stress experienced by ultramarathon runners.
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Affiliation(s)
| | - Serkan Duz
- Faculty of Sport Sciences, Inonu University, Malatya, Turkey
| | - Murat Kiraz
- Department of Neurosurgery, Faculty of Medicine, Hitit University, Çorum, Turkey
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Relationship of Carbohydrate Intake during a Single-Stage One-Day Ultra-Trail Race with Fatigue Outcomes and Gastrointestinal Problems: A Systematic Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18115737. [PMID: 34071815 PMCID: PMC8197833 DOI: 10.3390/ijerph18115737] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/21/2021] [Accepted: 05/24/2021] [Indexed: 12/16/2022]
Abstract
Due to the high metabolic and physical demands in single-stage one-day ultra-trail (SOUT) races, athletes should be properly prepared in both physical and nutritional aspects in order to delay fatigue and avoid associated difficulties. However, high carbohydrate (CHO) intake would seem to increase gastrointestinal (GI) problems. The main purpose of this systematic review was to evaluate CHO intake during SOUT events as well as its relationship with fatigue (in terms of internal exercise load, exercise-induced muscle damage (EIMD) and post-exercise recovery) and GI problems. A structured search was carried out in accordance with PRISMA guidelines in the following: Web of Science, Cochrane Library and Scopus databases up to 16 March 2021. After conducting the search and applying the inclusion/exclusion criteria, eight articles in total were included in this systematic review, in all of which CHO intake involved gels, energy bars and sports drinks. Two studies associated higher CHO consumption (120 g/h) with an improvement in internal exercise load. Likewise, these studies observed that SOUT runners whose intake was 120 g/h could benefit by limiting the EIMD observed by CK (creatine kinase), LDH (lactate dehydrogenase) and GOT (aspartate aminotransferase), and also improve recovery of high intensity running capacity 24 h after a trail marathon. In six studies, athletes had GI symptoms between 65–82%. In summary, most of the runners did not meet CHO intake standard recommendations for SOUT events (90 g/h), while athletes who consumed more CHO experienced a reduction in internal exercise load, limited EIMD and improvement in post-exercise recovery. Conversely, the GI symptoms were recurrent in SOUT athletes depending on altitude, environmental conditions and running speed. Therefore, a high CHO intake during SOUT events is important to delay fatigue and avoid GI complications, and to ensure high intake, it is necessary to implement intestinal training protocols.
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Williams J, Douglas J, Davies E, Bloom F, Castejon-Riber C. Performance demands in the endurance rider. COMPARATIVE EXERCISE PHYSIOLOGY 2021. [DOI: 10.3920/cep200033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Endurance is one of the fastest growing equestrian disciplines worldwide. Races are long distance competitions (40-160 km), organised into loops, over variable terrain usually within one day. Horse and rider combinations in endurance races have to complete the course in good condition whilst also aiming to win. Horse welfare is paramount within the sport and horses are required to ‘pass’ a veterinary check prior to racing, after each loop of the course and at the end of the race. Despite the health, fitness and welfare of both athletes within the horse-rider dyad being essential to achieve success, few equivalent measures assessing the wellbeing of the endurance rider are implemented. This review considers evidence from ultra-endurance sports and rider performance in other equestrian disciplines, to consider physiological and psychological strategies the endurance rider could use to enhance their competition performance. Successful endurance riding requires an effective partnership to be established between horse and rider. Within this partnership, adequate rider health and fitness are key to optimal decision-making to manage the horse effectively during training and competition, but just as importantly riders should manage themselves as an athlete. Targeted management for superior rider performance can underpin more effective decision-making promoting ethical equitation practices and optimising competition performance. Therefore, the responsible and competitive endurance rider needs to consider how they prepare themselves adequately for participation in the sport. This should include engaging in appropriate physiological training for fitness and musculoskeletal strength and conditioning. Alongside planning nutritional strategies to support rider performance in training and within the pre-, peri- and post-competition periods to promote superior physical and cognitive performance, and prevent injury. By applying an evidence informed approach to self-management, the endurance athlete will support the horse and rider partnership to achieve to their optimal capacity, whilst maximising both parties physical and psychological wellbeing.
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Affiliation(s)
- J.M. Williams
- Department of Animal Science, Hartpury University, Gloucester, GL19 3BE, United Kingdom
| | - J. Douglas
- Department of Animal Science, Hartpury University, Gloucester, GL19 3BE, United Kingdom
| | - E. Davies
- Department of Animal Science, Hartpury University, Gloucester, GL19 3BE, United Kingdom
| | - F. Bloom
- Department of Animal Science, Hartpury University, Gloucester, GL19 3BE, United Kingdom
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Manevitz Z, Leshem M, Heled Y, Epstein Y, Gershon B, Kodesh E. Exertional sodium loss does not increase immediate salt appetite or dietary sodium intake in athletes. Appetite 2021; 162:105181. [PMID: 33667501 DOI: 10.1016/j.appet.2021.105181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 02/22/2021] [Accepted: 02/23/2021] [Indexed: 10/22/2022]
Abstract
We tested whether salt preference increases immediately after exertion-induced Na+ loss in sweat, and whether this may generalise to an increase in habitual dietary Na+ intake. For the first aim, trained athletes (n = 20) exercised in 2 ambient temperatures and sweat Na+ loss related to immediate salt preference assessed by taste, intake and psychophysical tests. For the second aim, we compared dietary and urinary Na+, and salt preference, seasoning and hedonics in the athletes and sedentary men (n = 20). No relationship was found between sodium loss during exercise and immediate preference for salt or psychophysical responses, and no differences in comparison to sedentary men. However, athlete diet had fewer foods (29.4 ± 1.5 vs 37.8 ± 1.9, p < 0.001), less seasoning (19 vs 32. p = 0.011) and more athletes reported dietary limitations (31 vs 11, p < 0.05), although nutrient content did not differ. Together these might suggest athlete adherence to a healthy diet at the expense of variety and flavour and a dissociation between dietary reports and intake. Athletes, more than controls, liked foods rich in energy and K+ suggesting compensatory-driven hedonics, although overall their intake did not differ. The findings are consistent with the absence of a salt appetite responding to Na+ loss in humans, and specifically that trained athletes do not increase their preference for salt in immediate response to exertion-induced Na+ loss and are not at risk for increased dietary Na+ compared to sedentary men.
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Affiliation(s)
- Zev Manevitz
- Physical Therapy Department, Tel Aviv University, Israel
| | - Micah Leshem
- School of Psychological Sciences, University of Haifa, Israel.
| | - Yuval Heled
- The Faculty of Science, Kibbutzim College of Education, Technology and the Arts, Tel Aviv, Israel
| | - Yoram Epstein
- Physical Therapy Department, Tel Aviv University, Israel
| | - Barak Gershon
- The Ribstein Center for Sport Medicine and Research, Wingate Institute, Israel
| | - Einat Kodesh
- Physical Therapy Department, University of Haifa, Israel
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Devrim-Lanpir A, Hill L, Knechtle B. Efficacy of Popular Diets Applied by Endurance Athletes on Sports Performance: Beneficial or Detrimental? A Narrative Review. Nutrients 2021; 13:nu13020491. [PMID: 33540813 PMCID: PMC7912997 DOI: 10.3390/nu13020491] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 01/28/2021] [Accepted: 01/29/2021] [Indexed: 12/12/2022] Open
Abstract
Endurance athletes need a regular and well-detailed nutrition program in order to fill their energy stores before training/racing, to provide nutritional support that will allow them to endure the harsh conditions during training/race, and to provide effective recovery after training/racing. Since exercise-related gastrointestinal symptoms can significantly affect performance, they also need to develop strategies to address these issues. All these factors force endurance athletes to constantly seek a better nutritional strategy. Therefore, several new dietary approaches have gained interest among endurance athletes in recent decades. This review provides a current perspective to five popular diet approaches: (a) vegetarian diets, (b) high-fat diets, (c) intermittent fasting diets, (d) gluten-free diet, and (e) low fermentable oligosaccharides, disaccharides, monosaccharides and polyols (FODMAP) diets. We reviewed scientific studies published from 1983 to January 2021 investigating the impact of these popular diets on the endurance performance and health aspects of endurance athletes. We also discuss all the beneficial and harmful aspects of these diets, and offer key suggestions for endurance athletes to consider when following these diets.
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Affiliation(s)
- Aslı Devrim-Lanpir
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Istanbul Medeniyet University, 34862 Istanbul, Turkey;
| | - Lee Hill
- Division of Gastroenterology & Nutrition, Department of Pediatrics, McMaster University, Hamilton, ON L8N 3Z5, Canada;
| | - Beat Knechtle
- Medbase St. Gallen, am Vadianplatz, 9001 St. Gallen, Switzerland
- Institute of Primary Care, University of Zurich, 8091 Zurich, Switzerland
- Correspondence: ; Tel.: +41-(0)-71-226-93-00
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Mieszkowski J, Stankiewicz B, Kochanowicz A, Niespodziński B, Kowalik T, Żmijewski MA, Kowalski K, Rola R, Bieńkowski T, Antosiewicz J. Ultra-Marathon-Induced Increase in Serum Levels of Vitamin D Metabolites: A Double-Blind Randomized Controlled Trial. Nutrients 2020; 12:nu12123629. [PMID: 33255807 PMCID: PMC7760943 DOI: 10.3390/nu12123629] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/19/2020] [Accepted: 11/23/2020] [Indexed: 12/22/2022] Open
Abstract
Purpose: While an increasing number of studies demonstrate the importance of vitamin D for athletic performance, the effects of any type of exercise on vitamin D metabolism are poorly characterized. We aimed to identify the responses of some vitamin D metabolites to ultra-marathon runs. Methods: A repeated-measures design was implemented, in which 27 amateur runners were assigned into two groups: those who received a single dose of vitamin D3 (150,000 IU) 24 h before the start of the marathon (n = 13) and those (n = 14) who received a placebo. Blood samples were collected 24 h before, immediately after, and 24 h after the run. Results: In both groups of runners, serum 25(OH)D3, 24,25(OH)2D3, and 3-epi-25(OH)D3 levels significantly increased by 83%, 63%, and 182% after the ultra-marathon, respectively. The increase was most pronounced in the vitamin D group. Body mass and fat mass significantly decreased after the run in both groups. Conclusions: Ultra-marathon induces the mobilization of vitamin D into the blood. Furthermore, the 24,25(OH)2D3 and 3-epi-25(OH)D3 increases imply that the exercise stimulates vitamin D metabolism.
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Affiliation(s)
- Jan Mieszkowski
- Department of Gymnastics and Dance, Gdansk University of Physical Education and Sport, 80-336 Gdansk, Poland; (J.M.); (A.K.)
| | - Błażej Stankiewicz
- Institute of Physical Education, Kazimierz Wielki University, 85-064 Bydgoszcz, Poland; (B.S.); (B.N.); (T.K.)
| | - Andrzej Kochanowicz
- Department of Gymnastics and Dance, Gdansk University of Physical Education and Sport, 80-336 Gdansk, Poland; (J.M.); (A.K.)
| | - Bartłomiej Niespodziński
- Institute of Physical Education, Kazimierz Wielki University, 85-064 Bydgoszcz, Poland; (B.S.); (B.N.); (T.K.)
| | - Tomasz Kowalik
- Institute of Physical Education, Kazimierz Wielki University, 85-064 Bydgoszcz, Poland; (B.S.); (B.N.); (T.K.)
| | - Michał A. Żmijewski
- Department of Histology, Medical University of Gdańsk, 80-211 Gdansk, Poland;
| | - Konrad Kowalski
- Masdiag Sp. z o.o. Company, 01-882 Warsaw, Poland; (K.K.); (R.R.); (T.B.)
| | - Rafał Rola
- Masdiag Sp. z o.o. Company, 01-882 Warsaw, Poland; (K.K.); (R.R.); (T.B.)
- Chair of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University in Toruń, 87-100 Toruń, Poland
| | - Tomasz Bieńkowski
- Masdiag Sp. z o.o. Company, 01-882 Warsaw, Poland; (K.K.); (R.R.); (T.B.)
| | - Jędrzej Antosiewicz
- Department of Bioenergetics and Physiology of Exercise, Medical University of Gdansk, 80-210 Gdansk, Poland
- Correspondence: ; Tel.: +48-583491456
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Kobayashi Y, Imai N, Uenishi K. Attempt to Determine the Cut-Off Value of Serum Ferritin for Iron Deficiency in Male College Student Runners. J Nutr Sci Vitaminol (Tokyo) 2020; 66:432-440. [PMID: 33132346 DOI: 10.3177/jnsv.66.432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
For the evaluation of iron nutrition status, the measurement of serum ferritin levels is the most convenient and widely used technique for estimating stored iron. However, the cut-off value of serum ferritin for iron deficiency in athletes has not yet established. This study aimed to determine the cut-off value of serum ferritin to define iron deficiency in male college student runners. This study included 37-43 Japanese male college student runners for each month. Anthropometric measurements and blood collection were conducted from March to December 2018. In all months except May, significant negative correlations were observed between serum ferritin and transferrin levels, total iron binding capacity (TIBC), and unsaturated iron binding capacity. Furthermore, a significant association between serum ferritin levels and TIBC was observed by nonlinear regression analysis. The curvature radius and curvature were calculated using the data from 9 mo, and serum ferritin levels with the smallest curvature radius and the highest curvature in each month were identified. The serum ferritin levels were as follows: 35.0 ng/mL in March, 45.0 ng/mL in April, 40.0 ng/mL in June, 35.0 ng/mL in July, 35.0 ng/mL in August, 35.0 ng/mL in September, 35.0 ng/mL in October, 35.0 ng/mL in November, and 40.0 ng/mL in December. The average value was 37.2 ng/mL. In conclusion, the cut-off value of serum ferritin for defining iron deficiency in runners was determined to be 40.0 ng/mL in this study. This value (40.0 ng/mL) may be useful for iron deficiency screening in runners.
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Affiliation(s)
- Yuki Kobayashi
- Laboratory of Physiological Nutrition, Kagawa Nutrition University
| | - Nami Imai
- Laboratory of Physiological Nutrition, Kagawa Nutrition University
| | - Kazuhiro Uenishi
- Laboratory of Physiological Nutrition, Kagawa Nutrition University
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Scheer V, Vieluf S, Bitter N, Christ L, Heitkamp HC. The Optimal Weight Carriage System for Runners: Comparison Between Handheld Water Bottles, Waist Belts, and Backpacks. Front Physiol 2020; 11:571221. [PMID: 33117192 PMCID: PMC7561373 DOI: 10.3389/fphys.2020.571221] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 08/31/2020] [Indexed: 12/03/2022] Open
Abstract
In endurance running, where fluid and nutritional support is not always readily available, the carriage of water and nutrition is essential. To compare the economy and physiological demands of different carriage systems, 12 recreational runners (mean age 22.8 ± 2.2 years, body mass index 24.5 ± 1.8 kg m−2, VO2max 50.4 ± 5.3 ml kg−1 min−1), completed four running tests, each of 60-min duration at individual running speeds (mean running speed 9.5 ± 1.1 km h−1) on a motorized treadmill, after an initial exercise test. Either no load was carried (control) or loads of 1.0 kg, in a handheld water bottle, waist belt, or backpack. Economy was assessed by means of energy cost (CR), oxygen cost (O2 cost), heart rate (HR), and rate of perceived exertion (RPE). CR [F(2,20) = 37.74, p < 0.01, ηp2 = 0.79], O2 cost [F(2,20) = 37.98, p < 0.01, ηp2 = 0.79], HR [F(2,18) = 165.62, p < 0.01, ηp2 = 0.95], and RPE [F(2,18) = 165.62, p < 0.01, ηp2 = 0.95] increased over time, but no significant differences were found between the systems. Carrying a handheld water bottle, waist belt, or backpack, weighing 1.0 kg, during a 60-min run exhibited similar physiological changes. Runners’ choice may be guided by personal preference in the absence of differences in economy (CR, O2 cost, HR, and RPE).
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Affiliation(s)
- Volker Scheer
- Health Science Department, Universidad a Distancia de Madrid (UDIMA), Madrid, Spain.,Ultra Sports Science Foundation, Pierre Benite, France.,Department of Exercise and Health, Institute of Sports Medicine, University of Paderborn, Paderborn, Germany
| | - Solveig Vieluf
- Department of Exercise and Health, Institute of Sports Medicine, University of Paderborn, Paderborn, Germany
| | - Niko Bitter
- Department of Exercise and Health, Institute of Sports Medicine, University of Paderborn, Paderborn, Germany
| | - Leon Christ
- Department of Exercise and Health, Institute of Sports Medicine, University of Paderborn, Paderborn, Germany
| | - Hans-Christian Heitkamp
- Department of Exercise and Health, Institute of Sports Medicine, University of Paderborn, Paderborn, Germany
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Lavoué C, Siracusa J, Chalchat É, Bourrilhon C, Charlot K. Analysis of food and fluid intake in elite ultra-endurance runners during a 24-h world championship. J Int Soc Sports Nutr 2020; 17:36. [PMID: 32652998 PMCID: PMC7353765 DOI: 10.1186/s12970-020-00364-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Accepted: 06/22/2020] [Indexed: 01/03/2023] Open
Abstract
Background Properly replacing energy and fluids is a challenge for 24-h ultramarathoners because such unusually high intake may induce adverse effects (gastrointestinal symptoms [GIS] and exercise-associated hyponatremia [EAH]). We analyzed such intake for 12 twelve elite athletes (6 males and 6 females; age: 46 ± 7 years, height: 170 ± 9 cm, weight: 61.1 ± 9.6 kg, total distance run: 193–272 km) during the 2019 24-h World Championships and compared it to the latest nutritional recommendations described by the International Society of Sports Nutrition in 2019. We hypothesized that these elite athletes would easily comply these recommendations without exhibiting detrimental adverse symptoms. Methods Ad libitum food and fluid intake was recorded in real-time and energy, macronutrient, sodium, and caffeine intake then calculated using a spreadsheet in which the nutritional composition of each item was previously recorded. GIS, markers of dehydration (body mass modifications, plasma and urine osmolality, and plasma volume; samples obtained 26 h before and just after the race) and EAH (plasma and urine sodium concentrations) were also assessed. Results Fluid, energy, and carbohydrate intake of the 11 finishers was 16.4 ± 6.9 L, 35.1 ± 15.7 MJ, and 1.49 ± 0.71 kg, respectively. Individual analyses showed that all but one (for fluid intake) or two (for energy and carbohydrate intake) consumed more than the minimum recommendations. The calculated energy balance remained, however, largely negative (− 29.5 ± 16.1 MJ). Such unusually high intake was not accompanied by detrimental GIS (recorded in 75%, but only transiently [3.0 ± 0.9 h]) or EAH (0%). The athletes were not dehydrated, shown by the absence of significant body mass loss (− 0.92 ± 2.13%) and modifications of plasma osmolality and an increase in plasma volume (+ 19.5 ± 15.8%). Performance (distance ran) positively correlated with energy intake (ρ = 0.674, p = 0.023) and negatively (ρ = − 0.776, p = 0.005) with fluid intake. Conclusions Overall, almost all of these elite 24-h ultramarathoners surpassed the nutritional recommendations without encountering significant or the usual adverse effects.
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Affiliation(s)
- Chloé Lavoué
- Institut de Recherche Biomédicale des Armées, Unité de Physiologie des Exercices et Activités en Conditions Extrêmes, Département Environnements Opérationnels, 1 place Général Valérie André, 91223, Bretigny-Sur-Orge, France.,LBEPS, Univ Evry, IRBA, Université Paris Saclay, 91025, Evry, France
| | - Julien Siracusa
- Institut de Recherche Biomédicale des Armées, Unité de Physiologie des Exercices et Activités en Conditions Extrêmes, Département Environnements Opérationnels, 1 place Général Valérie André, 91223, Bretigny-Sur-Orge, France.,LBEPS, Univ Evry, IRBA, Université Paris Saclay, 91025, Evry, France
| | - Émeric Chalchat
- Institut de Recherche Biomédicale des Armées, Unité de Physiologie des Exercices et Activités en Conditions Extrêmes, Département Environnements Opérationnels, 1 place Général Valérie André, 91223, Bretigny-Sur-Orge, France.,LBEPS, Univ Evry, IRBA, Université Paris Saclay, 91025, Evry, France
| | - Cyprien Bourrilhon
- Institut de Recherche Biomédicale des Armées, Unité de Physiologie des Exercices et Activités en Conditions Extrêmes, Département Environnements Opérationnels, 1 place Général Valérie André, 91223, Bretigny-Sur-Orge, France.,LBEPS, Univ Evry, IRBA, Université Paris Saclay, 91025, Evry, France
| | - Keyne Charlot
- Institut de Recherche Biomédicale des Armées, Unité de Physiologie des Exercices et Activités en Conditions Extrêmes, Département Environnements Opérationnels, 1 place Général Valérie André, 91223, Bretigny-Sur-Orge, France. .,LBEPS, Univ Evry, IRBA, Université Paris Saclay, 91025, Evry, France.
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Varillas Delgado D, Tellería Orriols JJ, Monge Martín D, Del Coso J. Genotype scores in energy and iron-metabolising genes are higher in elite endurance athletes than in nonathlete controls. Appl Physiol Nutr Metab 2020; 45:1225-1231. [PMID: 32379996 DOI: 10.1139/apnm-2020-0174] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Information about the association of energy and iron-metabolising genes with endurance performance is scarce. The objective of this investigation was to compare the frequencies of polymorphic variations of genes involved in energy generation and iron metabolism in elite endurance athletes versus nonathlete controls. Genotype frequencies in 123 male elite endurance athletes (75 professional road cyclists and 48 elite endurance runners) and 122 male nonathlete participants were compared by assessing 4 genetic polymorphisms: AMPD1 c.34C/T (rs17602729), PPARGC1A c.1444G/A (rs8192678) HFEH63D c.187C/G (rs1799945) and HFEC282Y c.845G/A (rs1800562). A weighted genotype score (w-TGS; from 0 to 100 arbitrary units (a.u.)) was calculated by assigning a corresponding weight to each polymorphism. In the nonathlete population, the mean w-TGS value was lower (39.962 ± 14.654 a.u.) than in the group of elite endurance athletes (53.344 ± 17.053 a.u). The binary logistic regression analysis showed that participants with a w-TGS > 38.975 a.u had an odds ratio of 1.481 (95% confidence interval: 1.244-1.762; p < 0.001) for achieving elite athlete status. The genotypic distribution of polymorphic variations involved in energy generation and iron metabolism was different in elite endurance athletes vs. controls. Thus, an optimal genetic profile in these genes might contribute to physical endurance in athlete status. Novelty Genetic profile in energy generation and iron-metabolising genes in elite endurance athletes is different than that of nonathletes. There is an implication of an "optimal" genetic profile in the selected genes favouring endurance sporting performance.
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Affiliation(s)
- David Varillas Delgado
- Universidad Francisco de Vitoria, Faculty of Medicine, Research Unit, Pozuelo de Alarcón, Madrid 28223, Spain
| | | | - Diana Monge Martín
- Universidad Francisco de Vitoria, Faculty of Medicine, Pozuelo de Alarcón, Madrid 28223, Spain
| | - Juan Del Coso
- Rey Juan Carlos University, Centre for Sport Studies, Fuenlabrada, Madrid 28933, Spain
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Scheer V, Vieluf S, Schröder M, Lappe P, Heitkamp HC. A comparison of economy between two different backpack designs for runners. APPLIED ERGONOMICS 2020; 84:103038. [PMID: 31987519 DOI: 10.1016/j.apergo.2019.103038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 12/14/2019] [Accepted: 12/16/2019] [Indexed: 06/10/2023]
Abstract
We compared two backpack designs (back/front or back only) in twelve recreational runners (age 22.0 ± 1.7years). An initial incremental exercise test (VO2max 52.2 ± 4.7 ml kg-1.min-1) was conducted, followed by four tests of 20 min duration (running speed 9.8 ± 1.1 km/h) with loads carried of 0, 1 kg, 3 kg, and 6 kg with the two backpack designs in a randomized order. Economy was assessed by energy cost of running (CR), oxygen cost (O2 cost), heart rate (HR) and rate of perceived exertion (RPE). Repeated measure ANOVA revealed a non-significant main effect for CR, O2 cost, HR, RPE between systems. Post-hoc comparison of significant time × position interaction showed for CR, F(3,33) = 5.34, p < .01, ηp2 = 0.33, and O2 cost, F(3,33) = 5.15, p < .01, ηp2 = 0.32, that carrying weight in the back/front were significantly lower after 20 min (CR: p = .02 and O2 cost: p = .03). These results suggest, that for longer runs the equal distribution of weight is advantageous.
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Affiliation(s)
- Volker Scheer
- Ultra Sports Science Foundation, Pierre Benite, France; British Forces Germany, RRU Sennelager, Normandy Barracks, BFPO 16, Germany; Institute of Sports Medicine, Department of Health, University of Paderborn, Germany.
| | - Solveig Vieluf
- Institute of Sports Medicine, Department of Health, University of Paderborn, Germany
| | - Marc Schröder
- Institute of Sports Medicine, Department of Health, University of Paderborn, Germany
| | - Pascal Lappe
- Institute of Sports Medicine, Department of Health, University of Paderborn, Germany
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Exercise-Induced Muscle Damage and Cardiac Stress During a Marathon Could be Associated with Dietary Intake During the Week Before the Race. Nutrients 2020; 12:nu12020316. [PMID: 31991778 PMCID: PMC7071217 DOI: 10.3390/nu12020316] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 01/19/2020] [Accepted: 01/22/2020] [Indexed: 12/21/2022] Open
Abstract
Adequate food intake is important prior to endurance running competitions to facilitate adequate exercise intensity. However, no investigations have examined whether dietary intake could prevent exercise-induced muscle damage (EIMD) and cardiac stress (EICS). Thus, this study’s objective was to determine the associations between EIMD, EICS and endurance athlete diets one week before a marathon race. Sixty-nine male runners participated in this study. Food intake during the week prior to the race was collected through a seven-day weighed food record. Dietary intake on race day was also recorded. At the end of the marathon, blood samples were drawn to determine serum creatine kinase (CK) and myoglobin, and muscle–brain isoform creatine kinase (CK-MB), prohormone of brain natriuretic peptide (NT-proBNP), cardiac troponin I (TNI), and cardiac troponin T (TNT) concentration as markers of EIMD and EICS, respectively. To determine the association between these variables, a stepwise regression analysis was carried out. The dependent variable was defined as EIMD or EICS and the independent variables were defined as the number of servings within each different food group. Results showed that the intake of meat during the previous week was positively associated with post-race CK (Standardized Coefficients (β) = 0.643; p < 0.01) and myoglobin (β = 0.698; p < 0.001). Vegetables were negatively associated the concentration of post-race CK (β = −0.482; p = 0.002). Butter and fatty meat were positively associated with NT-proBNP (β = 0.796; p < 0.001) and TNI (β = 0.396; p < 0.001) post-marathon values. However, fish intake was negatively associated with CK (β = −0.272; p = 0.042), TNI (β = −0.593; p < 0.001) and TNT (β = −0.640; p = 0.002) post-marathon concentration. Olive oil was negatively associated with TNI (β = −0.536; p < 0.001) and TNT (β = −0.415; p = 0.021) values. In conclusion, the consumption of meat, butter, and fatty meat might be associated with higher levels of EIMD and EICS. On the other hand, fish, vegetables, and olive oil might have a protective role against EIMD and EICS. The selection of an adequate diet before a marathon might help to reduce some of the acute burdens associated with marathon races.
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Tiller NB, Roberts JD, Beasley L, Chapman S, Pinto JM, Smith L, Wiffin M, Russell M, Sparks SA, Duckworth L, O'Hara J, Sutton L, Antonio J, Willoughby DS, Tarpey MD, Smith-Ryan AE, Ormsbee MJ, Astorino TA, Kreider RB, McGinnis GR, Stout JR, Smith JW, Arent SM, Campbell BI, Bannock L. International Society of Sports Nutrition Position Stand: nutritional considerations for single-stage ultra-marathon training and racing. J Int Soc Sports Nutr 2019; 16:50. [PMID: 31699159 PMCID: PMC6839090 DOI: 10.1186/s12970-019-0312-9] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 09/24/2019] [Indexed: 12/12/2022] Open
Abstract
Background In this Position Statement, the International Society of Sports Nutrition (ISSN) provides an objective and critical review of the literature pertinent to nutritional considerations for training and racing in single-stage ultra-marathon. Recommendations for Training. i) Ultra-marathon runners should aim to meet the caloric demands of training by following an individualized and periodized strategy, comprising a varied, food-first approach; ii) Athletes should plan and implement their nutrition strategy with sufficient time to permit adaptations that enhance fat oxidative capacity; iii) The evidence overwhelmingly supports the inclusion of a moderate-to-high carbohydrate diet (i.e., ~ 60% of energy intake, 5–8 g·kg− 1·d− 1) to mitigate the negative effects of chronic, training-induced glycogen depletion; iv) Limiting carbohydrate intake before selected low-intensity sessions, and/or moderating daily carbohydrate intake, may enhance mitochondrial function and fat oxidative capacity. Nevertheless, this approach may compromise performance during high-intensity efforts; v) Protein intakes of ~ 1.6 g·kg− 1·d− 1 are necessary to maintain lean mass and support recovery from training, but amounts up to 2.5 g.kg− 1·d− 1 may be warranted during demanding training when calorie requirements are greater; Recommendations for Racing. vi) To attenuate caloric deficits, runners should aim to consume 150–400 Kcal·h− 1 (carbohydrate, 30–50 g·h− 1; protein, 5–10 g·h− 1) from a variety of calorie-dense foods. Consideration must be given to food palatability, individual tolerance, and the increased preference for savory foods in longer races; vii) Fluid volumes of 450–750 mL·h− 1 (~ 150–250 mL every 20 min) are recommended during racing. To minimize the likelihood of hyponatraemia, electrolytes (mainly sodium) may be needed in concentrations greater than that provided by most commercial products (i.e., > 575 mg·L− 1 sodium). Fluid and electrolyte requirements will be elevated when running in hot and/or humid conditions; viii) Evidence supports progressive gut-training and/or low-FODMAP diets (fermentable oligosaccharide, disaccharide, monosaccharide and polyol) to alleviate symptoms of gastrointestinal distress during racing; ix) The evidence in support of ketogenic diets and/or ketone esters to improve ultra-marathon performance is lacking, with further research warranted; x) Evidence supports the strategic use of caffeine to sustain performance in the latter stages of racing, particularly when sleep deprivation may compromise athlete safety.
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Affiliation(s)
- Nicholas B Tiller
- Division of Pulmonary and Critical Care Physiology and Medicine, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, CA, USA. .,Academy of Sport and Physical Activity, Faculty of Health and Wellbeing, Sheffield Hallam University, Sheffield, UK.
| | - Justin D Roberts
- Cambridge Centre for Sport and Exercise Sciences, School of Psychology and Sports Science, Anglia Ruskin University, Cambridge, UK.
| | - Liam Beasley
- Cambridge Centre for Sport and Exercise Sciences, School of Psychology and Sports Science, Anglia Ruskin University, Cambridge, UK
| | - Shaun Chapman
- Cambridge Centre for Sport and Exercise Sciences, School of Psychology and Sports Science, Anglia Ruskin University, Cambridge, UK
| | - Jorge M Pinto
- Cambridge Centre for Sport and Exercise Sciences, School of Psychology and Sports Science, Anglia Ruskin University, Cambridge, UK
| | - Lee Smith
- Cambridge Centre for Sport and Exercise Sciences, School of Psychology and Sports Science, Anglia Ruskin University, Cambridge, UK
| | - Melanie Wiffin
- Cambridge Centre for Sport and Exercise Sciences, School of Psychology and Sports Science, Anglia Ruskin University, Cambridge, UK
| | - Mark Russell
- School of Social and Health Sciences, Leeds Trinity University, Leeds, UK
| | - S Andy Sparks
- Sport Nutrition and Performance Research Group, Department of Sport and Physical Activity, Edge Hill University, Ormskirk, Lancashire, UK
| | | | - John O'Hara
- Carnegie School of Sport, Leeds Beckett University, Leeds, UK
| | - Louise Sutton
- Carnegie School of Sport, Leeds Beckett University, Leeds, UK
| | - Jose Antonio
- College of Health Care Sciences, Nova Southeastern University, Fort Lauderdale, FL, USA
| | - Darryn S Willoughby
- Department of Health, Human Performance, and Recreation, Baylor University, Waco, TX, USA
| | - Michael D Tarpey
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, USA
| | - Abbie E Smith-Ryan
- Department of Exercise and Sport Science, University of North Carolina, Chapel Hill, NC, USA
| | - Michael J Ormsbee
- Institute of Sports Sciences & Medicine, Department of Nutrition, Food and Exercise Sciences, Florida State University, Tallahassee, FL, USA.,Discipline of Biokinetics, Exercise and Leisure Sciences, School of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Todd A Astorino
- Department of Kinesiology, California State University San Marcos, San Marcos, CA, USA
| | - Richard B Kreider
- Department of Health & Kinesiology, Texas A&M University, College Station, TX, USA
| | - Graham R McGinnis
- Kinesiology and Nutrition Sciences, University of Nevada, Las Vegas, NV, USA
| | - Jeffrey R Stout
- College of Health Professions and Sciences, University of Central Florida, Orlando, FL, USA
| | - JohnEric W Smith
- Department of Kinesiology, Mississippi State University, Mississippi, MS, USA
| | - Shawn M Arent
- Department of Exercise Science, University of South Carolina, Columbia, SC, USA
| | - Bill I Campbell
- Exercise Science Program, Performance & Physique Enhancement Laboratory, University of South Florida, Tampa, FL, USA
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Vitale K, Getzin A. Nutrition and Supplement Update for the Endurance Athlete: Review and Recommendations. Nutrients 2019; 11:nu11061289. [PMID: 31181616 PMCID: PMC6628334 DOI: 10.3390/nu11061289] [Citation(s) in RCA: 105] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 05/28/2019] [Accepted: 06/06/2019] [Indexed: 01/06/2023] Open
Abstract
Background: Endurance events have experienced a significant increase in growth in the new millennium and are popular activities for participation globally. Sports nutrition recommendations for endurance exercise however remains a complex issue with often opposing views and advice by various health care professionals. Methods: A PubMed/Medline search on the topics of endurance, athletes, nutrition, and performance was undertaken and a review performed summarizing the current evidence concerning macronutrients, hydration, and supplements as it pertains to endurance athletes. Results: Carbohydrate and hydration recommendations have not drastically changed in years, while protein and fat intake have been traditionally underemphasized in endurance athletes. Several supplements are commercially available to athletes, of which, few may be of benefit for endurance activities, including nitrates, antioxidants, caffeine, and probiotics, and are reviewed here. The topic of “train low,” training in a low carbohydrate state is also discussed, and the post-exercise nutritional “recovery window” remains an important point to emphasize to endurance competitors. Conclusions: This review summarizes the key recommendations for macronutrients, hydration, and supplements for endurance athletes, and helps clinicians treating endurance athletes clear up misconceptions in sports nutrition research when counseling the endurance athlete.
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Affiliation(s)
- Kenneth Vitale
- Department of Orthopaedic Surgery, Division of Sports Medicine, University of California San Diego, La Jolla, CA 92037, USA.
| | - Andrew Getzin
- Sports Medicine, Cayuga Medical Center, Ithaca, NY 14850, USA.
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Córdova A, Mielgo-Ayuso J, Fernandez-Lazaro CI, Caballero-García A, Roche E, Fernández-Lázaro D. Effect of Iron Supplementation on the Modulation of Iron Metabolism, Muscle Damage Biomarkers and Cortisol in Professional Cyclists. Nutrients 2019; 11:nu11030500. [PMID: 30818782 PMCID: PMC6470682 DOI: 10.3390/nu11030500] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 02/21/2019] [Accepted: 02/25/2019] [Indexed: 12/03/2022] Open
Abstract
Background: The intense efforts made during 3-week stage races may reduce iron metabolism and hematological parameters. These efforts may increase the levels of circulating muscle damage markers and some hormones. All of these physiological changes may have negative consequences not only for the performance of athletes but also for their health. The main aim of this study was to evaluate the effects of supplementation with 80 mg/day of iron on haematological parameters, serum cortisol and biochemical muscle indicators on elite male cyclists during the 3-week stage race the Vuelta a España. Our secondary aim was to examine whether the hematological profile is associated with muscular damage parameters and cortisol. Methods: Eighteen elite male cyclists from two teams were randomly assigned to one of two groups: (1) control group (CG, n = 9; age: 26.1 ± 4.6 years; maximum oxygen uptake per kg: 78.0 ± 5.4 mL/kg/min) or (2) group treated with 80 mg/day iron (800 mg of iron protein succinylate, ITG, n = 9; age: 25.7 ± 6.4 years; maximum oxygen uptake per kg: 77.6 ± 6.5 mL/kg/min). The cyclists were subjected to blood tests one week before the start of the race (T1) and after 4 weeks of treatment, coinciding with the end of the competition (T2). Iron metabolism parameters, muscle damage indicators and serum cortisol were assessed. Repeated-measures ANOVA with group as a factor (GC and ITG) were used to examine the differences between groups throughout the study (time × group) after iron supplementation treatment. Results: Significant differences were observed between groups throughout the study in the group-by-time interaction and changes in serum iron (GC: −8.93 ± 10.35% vs. ITG: 0.60 ± 8.64%; p = 0.018), ferritin (GC: −13.88 ± 23.53% vs. ITG: 91.08 ± 118.30%; p = 0.004), haemoglobin (GC: 10.00 ± 3.32% vs. ITG: 13.04 ± 5.64%; p < 0.001), haematocrit (GC: −1.17 ± 3.78% vs. ITG: 7.32 ± 3.92%; p < 0.001) and cortisol (GC: 24.74 ± 25.84% vs. ITG: –13.54 ± 13.61%; p = 0.005). However, no significant group-by-time interaction was observed for the circulating muscle biomarkers. Additionally, significant negative correlations of serum iron, haemoglobin and haematocrit with muscle circulating biomarkers and cortisol (p < 0.05) were observed. Conclusions: Oral iron supplementation with 80 mg/day iron (800 mg of iron protein succinylate) effectively prevented a decline in haematological parameters (serum iron, ferritin, haemoglobin and haematocrit) and maintained optimal levels of recovery in elite cyclists during the Vuelta a España. Moreover, the hematological values were shown to have relationship with muscular recovery parameters.
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Affiliation(s)
- Alfredo Córdova
- Department of Biochemistry and Physiology, Faculty of Physical Therapy, University of Valladolid, Campus de Soria, 42003 Soria, Spain.
| | - Juan Mielgo-Ayuso
- Department of Biochemistry and Physiology, Faculty of Physical Therapy, University of Valladolid, Campus de Soria, 42003 Soria, Spain.
| | - Cesar I Fernandez-Lazaro
- Department of Biochemistry and Histology, Faculty of Physical Therapy, University of Valladolid, Campus de Soria, 42003 Soria, Spain.
- Department of Preventive Medicine and Public Health, School of Medicine, University of Navarra, 31008 Pamplona, Spain.
| | - Alberto Caballero-García
- Department of Anatomy and Radiology, Faculty of Physical Therapy, University of Valladolid, Campus de Soria, 42003 Soria, Spain.
| | - Enrique Roche
- Department of Applied Biology-Nutrition and Institute of Bioengineering, Alicante Institute for Health and Biomedical Research (ISABIAL-FISABIO Foundation), 03202 Elche, Alicante, Spain.
- CIBERobn (Fisiopatología de la Obesidad y la Nutrición CB12/03/30038) Instituto de Salud Carlos III, 28029 Madrid, Spain.
| | - Diego Fernández-Lázaro
- Department of Biochemistry and Histology, Faculty of Physical Therapy, University of Valladolid, Campus de Soria, 42003 Soria, Spain.
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