MC 6150
Stanford, CA 94305
Fax: (650) 725-2607
University of Michigan Medical School, Ann Arbor, MI, 5/11/2012
UCLA David Geffen School Of Medicine Registrar, Los Angeles, CA, 6/30/2015
UCLA David Geffen School Of Medicine Registrar, Los Angeles, CA, 6/30/2016
UCLA David Geffen School Of Medicine Registrar, Los Angeles, CA, 06/30/2017
Family Medicine, American Board of Family Medicine
Sports Medicine, American Board of Family Medicine
Barrack, MT, Fredericson, M, Dizon, F, Tenforde, AS, Kim, BY, Kraus, E, Kussman, A, Singh, S, and Nattiv, A. Dietary supplement use according to sex and Triad risk factors in collegiate endurance runners. J Strength Cond Res XX(X): 000-000, 2020-This cross-sectional study evaluated the prevalence in the use of dietary supplements among elite collegiate runners among 2 NCAA Division I cross-country teams. At the start of each season from 2015 to 2017, male and female endurance runners were recruited to complete baseline study measures; the final sample included 135 (male n = 65, female n = 70) runners. Runners completed a health survey, web-based nutrition survey, and Triad risk assessment. The prevalence of dietary supplement use and Triad risk factors, including disordered eating, low bone mass, amenorrhea (in women), low body mass index, and stress fracture history, was assessed. A total of 78.5% (n = 106) runners reported taking 1 or more supplements on 4 days per week over the past month, 48% (n = 65) reported use of 3 supplements. Products used with highest frequency included multivitamin/minerals 46.7% (n = 63), iron 46.7% (n = 63), vitamin D 34.1% (n = 46), and calcium 33.3% (n = 45). More women, compared with men, used iron (61.4 vs. 30.8%, p < 0.001) and calcium (41.4 vs. 24.6%, p = 0.04); men exhibited higher use of amino acids and beta-alanine (6.2 vs. 0%, p = 0.04). Runners with bone stress injury (BSI) history, vs. no previous BSI, reported more frequent use of 3 supplements (61.5 vs. 32.8%, p = 0.001), vitamin D (49.2 vs. 19.4%, p < 0.001), and calcium (47.7 vs. 19.4%, p = 0.001). Low bone mineral density was also associated with higher use of vitamin D and calcium. Most runners reported regular use of 1 or more supplements, with patterns of use varying based on sex, history of BSI, and bone mass.
View details for DOI 10.1519/JSC.0000000000003848
View details for PubMedID 33278271
View details for Web of Science ID 000590026302610
View details for Web of Science ID 000590026303111
View details for DOI 10.1136/bjsports-2018-099861
View details for Web of Science ID 000458357900011
OBJECTIVES: Bone stress injuries (BSI) are common in runners of both sexes. The purpose of this study was to determine if a modified Female Athlete Triad Cumulative Risk Assessment tool would predict BSI in male distance runners.METHODS: 156 male runners at two collegiate programmes were studied using mixed retrospective and prospective design for a total of 7years. Point values were assigned using risk assessment categories including low energy availability, low body mass index (BMI), low bone mineral density (BMD) and prior BSI. The outcome was subsequent development of BSI. Statistical models used a mixed effects Poisson regression model with p<0.05 as threshold for significance. Two regression analyses were performed: (1) baseline risk factors as the independent variable; and (2) annual change in risk factors (longitudinal data) as the independent variable.RESULTS: 42/156 runners (27%) sustained 61 BSIs over an average 1.9 years of follow-up. In the baseline risk factor model, each 1 point increase in prior BSI score was associated with a 57% increased risk for prospective BSI (p=0.0042) and each 1 point increase in cumulative risk score was associated with a 37% increase in prospective BSI risk (p=0.0079). In the longitudinal model, each 1 point increase in cumulative risk score was associated with a 27% increase in prospective BSI risk (p=0.05). BMI (rate ratio (RR)=1.91, p=0.11) and BMD (RR=1.58, p=0.19) risk scores were not associated with BSI.CONCLUSION: A modified cumulative risk assessment tool may help identify male runners at elevated risk for BSI. Identifying risk factors may guide treatment and prevention strategies.
View details for PubMedID 30580252
View details for Web of Science ID 000456870502137
View details for DOI 10.1249/01.mss.0000519298.55627.5d
View details for Web of Science ID 000415216000102
View details for DOI 10.1249/01.mss.0000520026.24336.5f
View details for Web of Science ID 000415216000792
View details for DOI 10.1016/j.pmrj.2016.07.196
View details for PubMedID 27672919
Eating disorders, such as anorexia nervosa and bulimia nervosa, can have devastating effects on both the health and performance of athletes. Compared to non-athletes, both female and male athletes are at higher risk of developing an eating disorder. This is especially true for athletes participating in sports where low body weight or leanness confers a competitive advantage. Screening for disordered eating behaviours, eating disorders and for related health consequences should be a standard component of preparticipation examinations, and team physicians should be knowledgeable of the updated diagnostic criteria for eating disorders in the Diagnostic and Statistical Manual-V. Athletes with eating disorders should undergo thorough evaluation and treatment by an experienced multidisciplinary team. Team physicians play a critical role in decision-making on clearance for participation and return to play. Using evidence-based guidelines for clearance and return to play encourages transparency and accountability between the sports medicine care team and the athlete. Efforts to prevent eating disorders should be aimed at athletes, coaches, parents and athletic administrators, and focused on expanding knowledge of healthy nutrition in support of sport performance and health.
View details for DOI 10.1136/bjsports-2015-095735
View details for Web of Science ID 000369998100010
View details for PubMedID 26782763
View details for DOI 10.1249/01.mss.0000479187.99648.37
View details for Web of Science ID 000415222200244