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[PMID]:29364940
[Au] Autor:Ogueta-Alday A; Morante JC; Gómez-Molina J; García-López J
[Ad] Endereço:Department of Physical Education and Sports, Institute of Biomedicine (IBIOMED), Faculty of Physical Activity and Sports Sciences (FCAFD), University of León, León, Spain.
[Ti] Título:Similarities and differences among half-marathon runners according to their performance level.
[So] Source:PLoS One;13(1):e0191688, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:This study aimed to identify the similarities and differences among half-marathon runners in relation to their performance level. Forty-eight male runners were classified into 4 groups according to their performance level in a half-marathon (min): Group 1 (n = 11, < 70 min), Group 2 (n = 13, < 80 min), Group 3 (n = 13, < 90 min), Group 4 (n = 11, < 105 min). In two separate sessions, training-related, anthropometric, physiological, foot strike pattern and spatio-temporal variables were recorded. Significant differences (p<0.05) between groups (ES = 0.55-3.16) and correlations with performance were obtained (r = 0.34-0.92) in training-related (experience and running distance per week), anthropometric (mass, body mass index and sum of 6 skinfolds), physiological (VO2max, RCT and running economy), foot strike pattern and spatio-temporal variables (contact time, step rate and length). At standardized submaximal speeds (11, 13 and 15 km·h-1), no significant differences between groups were observed in step rate and length, neither in contact time when foot strike pattern was taken into account. In conclusion, apart from training-related, anthropometric and physiological variables, foot strike pattern and step length were the only biomechanical variables sensitive to half-marathon performance, which are essential to achieve high running speeds. However, when foot strike pattern and running speeds were controlled (submaximal test), the spatio-temporal variables were similar. This indicates that foot strike pattern and running speed are responsible for spatio-temporal differences among runners of different performance level.
[Mh] Termos MeSH primário: Corrida
[Mh] Termos MeSH secundário: Adulto
Seres Humanos
Masculino
Meia-Idade
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180125
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191688


  2 / 16529 MEDLINE  
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[PMID]:29278023
[Au] Autor:Clemente-Suárez VJ; Mielgo-Ayuso J; Quiles JL; Varela-Lopez A; Aranda P
[Ad] Endereço:1 Applied Psychophysiological Research Group, European University of Madrid , Madrid, Spain.
[Ti] Título:Effect of α-tocopherol megadoses on hematologic parameters and antioxidant capacity of rats in an ultraendurance probe.
[So] Source:Physiol Int;104(4):291-300, 2017 Dec 01.
[Is] ISSN:2498-602X
[Cp] País de publicação:Hungary
[La] Idioma:eng
[Ab] Resumo:This study was aimed to analyze the effect of two different megadoses of α-tocopherol (vit E) in the antioxidant activity and red and white blood series of Wistar rats after a 180-min ultraendurance probe. Three groups of 10 rats were analyzed; VEAG: acute administration of a megadoses of 5,000 IU/kg of vit E the day before the probe; VECG: chronic administration of 1,000 IU/kg/day of vit E for 6 days before the probe; CG: placebo administration. VEAG presented white cells, red blood cells, hematocrit, hemoglobin values significantly higher than CG and VECG (p < 0.05). The mean corpuscular hemoglobin and lymphocytes concentrations were significantly higher in the VECG than in the other two groups (p < 0.05). Similarly, VEAG presented a significantly higher vit E blood concentration than VECG and CG (p < 0.05), and VECG than CG (p < 0.05). Finally, we found a significantly positive correlation between trolox equivalent antioxidant capacity (TEAC) and red blood cells concentration (r = 0.374) and a significantly inverse correlation between TEAC and blood lactate concentration (r = -0.365). Our findings suggest that acute vit E megadoses could protect against transitory sport anemia symptoms and increase the white blood cell count in comparison with the chronic dose and control groups after an ultraendurance probe.
[Mh] Termos MeSH primário: Leucócitos/fisiologia
Substâncias para Melhoria do Desempenho/administração & dosagem
Resistência Física/efeitos dos fármacos
Resistência Física/fisiologia
Espécies Reativas de Oxigênio/metabolismo
Corrida/fisiologia
alfa-Tocoferol/administração & dosagem
[Mh] Termos MeSH secundário: Animais
Antioxidantes/administração & dosagem
Relação Dose-Resposta a Droga
Eritrócitos/citologia
Eritrócitos/fisiologia
Hematócrito
Leucócitos/citologia
Masculino
Ratos
Ratos Wistar
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Antioxidants); 0 (Performance-Enhancing Substances); 0 (Reactive Oxygen Species); H4N855PNZ1 (alpha-Tocopherol)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171227
[St] Status:MEDLINE
[do] DOI:10.1556/2060.104.2017.4.2


  3 / 16529 MEDLINE  
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[PMID]:29200984
[Au] Autor:Konishi K; Kimura T; Yuhaku A; Kurihara T; Fujimoto M; Hamaoka T; Sanada K
[Ad] Endereço:Graduate School of Sport and Health Science, Ritsumeikan University, Kyoto, Shiga Japan.
[Ti] Título:Mouth rinsing with a carbohydrate solution attenuates exercise-induced decline in executive function.
[So] Source:J Int Soc Sports Nutr;14:45, 2017.
[Is] ISSN:1550-2783
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Background: A decline in executive function could have a negative influence on the control of actions in dynamic situations, such as sports activities. Mouth rinsing with a carbohydrate solution could serve as an effective treatment for preserving the executive function in exercise. The purpose of this study was to examine the effects of mouth rinsing with a carbohydrate solution on executive function after sustained moderately high-intensity exercise. Methods: Eight young healthy participants completed 65 min of running at 75% V̇O max with two mouth-rinsing conditions: with a carbohydrate solution (CHO) or with water (CON). Executive function was assessed before and after exercise by using the incongruent task of the Stroop Color and Word Test. The levels of blood glucose; and plasma adrenocorticotropic hormone (ACTH), epinephrine, and norepinephrine (NE) were evaluated. A two-way repeated-measures ANOVA, with condition (CHO and CON) and time (pre-exercise and post-exercise) as factors, was used to examine the main and interaction effects on the outcome measures. Results: The reaction time in the incongruent condition of the Stroop test significantly increased after exercise in CON (pre-exercise 529 ± 45 ms vs. post-exercise 547 ± 60 ms, = 0.029) but not in CHO (pre-exercise 531 ± 54 ms vs. post-exercise 522 ± 80 ms), which resulted in a significant interaction (condition × time) on the reaction time ( = 0.028). The increased reaction time in CON indicates a decline in the executive function, which was attenuated in CHO. Increases in plasma epinephrine and NE levels demonstrated a trend toward attenuation accompanying CHO ( < 0.085), which appeared to be associated with the preservation of executive function. The blood glucose concentration showed neither significant interactions nor main effects of condition. Conclusions: These findings indicate that mouth rinsing with a carbohydrate solution attenuated the decline in executive function induced by sustained moderately high-intensity exercise, and that such attenuation seems to be unrelated to carbohydrate metabolic pathway but rather attributed, in part, to the inhibition of the excessive release of stress hormones.
[Mh] Termos MeSH primário: Carboidratos da Dieta/administração & dosagem
Carboidratos da Dieta/farmacologia
Função Executiva/efeitos dos fármacos
Função Executiva/fisiologia
Exercício/fisiologia
Antissépticos Bucais/farmacologia
Corrida/fisiologia
[Mh] Termos MeSH secundário: Hormônio Adrenocorticotrópico/metabolismo
Análise de Variância
Glicemia/metabolismo
Epinefrina/metabolismo
Feminino
Seres Humanos
Masculino
Fenômenos Fisiológicos da Nutrição Esportiva
Teste de Stroop
Água
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE; RANDOMIZED CONTROLLED TRIAL
[Nm] Nome de substância:
0 (Blood Glucose); 0 (Dietary Carbohydrates); 0 (Mouthwashes); 059QF0KO0R (Water); 9002-60-2 (Adrenocorticotropic Hormone); YKH834O4BH (Epinephrine)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171205
[St] Status:MEDLINE
[do] DOI:10.1186/s12970-017-0200-0


  4 / 16529 MEDLINE  
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[PMID]:28749699
[Au] Autor:Herrington L; Alarifi S; Jones R
[Ad] Endereço:Centre for Health, Sport and Rehabilitation Sciences, University of Salford, Salford, UK.
[Ti] Título:Patellofemoral Joint Loads During Running at the Time of Return to Sport in Elite Athletes With ACL Reconstruction.
[So] Source:Am J Sports Med;45(12):2812-2816, 2017 Oct.
[Is] ISSN:1552-3365
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Patellofemoral joint pain and degeneration are common in patients who undergo anterior cruciate ligament reconstruction (ACLR). The presence of patellofemoral joint pain significantly affects the patient's ability to continue sport participation and may even affect participation in activities of daily living. The mechanisms behind patellofemoral joint pain and degeneration are unclear, but previous research has identified altered patellofemoral joint loading in individuals with patellofemoral joint pain when running. It is unclear whether this process occurs after ACLR. PURPOSE: To assess the patellofemoral joint stresses during running in ACLR knees and compare the findings to the noninjured knee and matched control knees. STUDY DESIGN: Controlled laboratory study. METHODS: Thirty-four elite sports practitioners who had undergone ACLR and 34 age- and sex-matched controls participated in the study. The participants' running gait was assessed via 3D motion capture, and knee loads and forces were calculated by use of inverse dynamics. RESULTS: A significance difference was found in knee extensor moment, knee flexion angles, patellofemoral contact force (about 23% greater), and patellofemoral contact pressure (about 27% greater) between the ACLR and the noninjured limb ( P ≤ .04) and between the ACLR and the control limb ( P ≤ .04); no significant differences were found between the noninjured and control limbs ( P ≥ .44). CONCLUSION: Significantly greater levels of patellofemoral joint stress and load were found in the ACLR knee compared with the noninjured and control knees. CLINICAL RELEVANCE: Altered levels of patellofemoral stress in the ACLR knee during running may predispose individuals to patellofemoral joint pain.
[Mh] Termos MeSH primário: Lesões do Ligamento Cruzado Anterior/fisiopatologia
Lesões do Ligamento Cruzado Anterior/cirurgia
Reconstrução do Ligamento Cruzado Anterior
Artralgia/fisiopatologia
Articulação Patelofemoral/fisiopatologia
Volta ao Esporte
[Mh] Termos MeSH secundário: Atividades Cotidianas
Adulto
Fenômenos Biomecânicos
Feminino
Marcha/fisiologia
Seres Humanos
Masculino
Articulação Patelofemoral/fisiologia
Corrida/fisiologia
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180306
[Lr] Data última revisão:
180306
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170728
[St] Status:MEDLINE
[do] DOI:10.1177/0363546517716632


  5 / 16529 MEDLINE  
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[PMID]:28417667
[Au] Autor:Au IPH; Lau FOY; An WW; Zhang JH; Chen TL; Cheung RTH
[Ad] Endereço:a Gait & Motion Analysis Laboratory, Department of Rehabilitation Sciences , The Hong Kong Polytechnic University , Hong Kong, China.
[Ti] Título:Immediate and short-term biomechanical adaptation of habitual barefoot runners who start shod running.
[So] Source:J Sports Sci;36(4):451-455, 2018 Feb.
[Is] ISSN:1466-447X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:This study investigated the immediate and short-term effects of minimalist shoes (MS) and traditional running shoes (TRS) on vertical loading rates, foot strike pattern and lower limb kinematics in a group of habitual barefoot runners. Twelve habitual barefoot runners were randomly given a pair of MS or TRS and were asked to run with the prescribed shoes for 1 month. Outcome variables were obtained before, immediate after and 1 month after shoe prescription. Average and instantaneous vertical loading rates at the 1-month follow-up were significantly higher than that at the pre-shod session (P < 0.034, η > 0.474). Foot strike angle in the TRS group was significantly lower than that in the MS group (P = 0.045, η = 0.585). However, there was no significant time nor shoe effect on overstride, knee and ankle excursion (P > 0.061). Habitual barefoot runners appeared to land with a greater impact during shod running and they tended to have a more rearfoot strike pattern while wearing TRS. Lower limb kinematics were comparable before and after shoe prescription. Longer period of follow-up is suggested to further investigate the footwear effect on the running biomechanics in habitual barefoot runners.
[Mh] Termos MeSH primário: Adaptação Fisiológica
/fisiologia
Corrida/fisiologia
Sapatos
[Mh] Termos MeSH secundário: Adolescente
Fenômenos Biomecânicos
Desenho de Equipamento
Feminino
Seres Humanos
Extremidade Inferior/fisiologia
Masculino
Fatores de Tempo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180302
[Lr] Data última revisão:
180302
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170419
[St] Status:MEDLINE
[do] DOI:10.1080/02640414.2017.1313997


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[PMID]:28406358
[Au] Autor:Tam N; Santos-Concejero J; Tucker R; Lamberts RP; Micklesfield LK
[Ad] Endereço:a Division of Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Science , University of Cape Town , Cape Town , South Africa.
[Ti] Título:Bone health in elite Kenyan runners.
[So] Source:J Sports Sci;36(4):456-461, 2018 Feb.
[Is] ISSN:1466-447X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Impact loading in athletes participating in various sports has been positively associated with increased bone mineral density (BMD), but this has not been investigated in elite Kenyan runners. Body composition and site-specific BMD measures quantified with dual x-ray absorptiometry were measured in 15 elite male Kenyan runners and 23 apparently healthy South African males of different ethnicities. Training load and biomechanical variables associated with impact loading, such as joint stiffness, were determined in the elite Kenyan runners. Greater proximal femur (PF) BMD (g · cm ) was higher (P = 0.001, ES = 1.24) in the elite Kenyan runners compared with the controls. Six of the 15 (40%) Kenyan runners exhibited lumbar spine (LS) Z-Scores below -2.0 SD, whereas this was not found in the apparently healthy controls. PFBMD was associated with training load (r = 0.560, P = 0.003) and ankle (r = 0.710, P = 0.004) and knee (r = 0.546, P = 0.043) joint stiffness. Elite Kenyan runners exhibit greater PFBMD than healthy controls, which is associated with higher training load and higher joint stiffness. Our results reaffirm the benefits of impact loading on BMD at a weight-bearing site, while a high prevalence of low LSBMD in the elite Kenyan runners is hypothesised to be the result of a mismatch between energy intake and high training load. Future research investigating energy availability in Kenyan runners and the possible association with musculoskeletal injury should be investigated.
[Mh] Termos MeSH primário: Composição Corporal/fisiologia
Densidade Óssea/fisiologia
Corrida/fisiologia
[Mh] Termos MeSH secundário: Absorciometria de Fóton
Adulto
Fenômenos Biomecânicos
Fêmur/metabolismo
Seres Humanos
Quênia
Vértebras Lombares/metabolismo
Masculino
Estado Nutricional
Condicionamento Físico Humano
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180302
[Lr] Data última revisão:
180302
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170414
[St] Status:MEDLINE
[do] DOI:10.1080/02640414.2017.1313998


  7 / 16529 MEDLINE  
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[PMID]:28376678
[Au] Autor:Lee BJ; Clarke ND; Hankey J; Thake CD
[Ad] Endereço:a Department of Sport and Exercise Sciences , University of Chichester , Chichester , UK.
[Ti] Título:Whole body precooling attenuates the extracellular HSP72, IL-6 and IL-10 responses after an acute bout of running in the heat.
[So] Source:J Sports Sci;36(4):414-421, 2018 Feb.
[Is] ISSN:1466-447X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The impact of whole-body precooling on the extracellular heat shock protein 72 (eHSP72) and cytokine responses to running in the heat is undefined. The aim of this study was to determine whether precooling would attenuate post-exercise eHSP72 and cytokine responses. Eight male recreational runners completed two 90-minute bouts of running at 65% [Formula: see text]O max in 32 ± 0.9°C and 47 ± 6 % relative humidity (RH) preceded by either 60-minutes of precooling in 20.3 ± 0.3°C water (COOL) or 60 min rest in an air-conditioned laboratory (20.2 ± 1.7°C, 60 ± 3% RH; CON). eHSP72, TNF-α, IL-6, IL-10 IL-1ra were determined before and immediately after exercise. The elevation in post-exercise eHSP72 was attenuated after COOL (+0.04 ± 0.10 ng.mL ) compared to CON (+ 0.29 ± 0.26 ng.mL ;P < 0.001). No changes in TNF-α were observed at any stage. COOL reduced the absolute post-exercise change in IL-6 (P = 0.011) and IL-10 (P = 0.03) compared to CON. IL-1ra followed this trend (P = 0.063). A precooling-induced attenuation of eHSP72 and proinflammatory cytokines may aid recovery during multi-day sporting events, but could be counterproductive if a training response or adaptation to environmental stress is a desired outcome.
[Mh] Termos MeSH primário: Crioterapia/métodos
Proteínas de Choque Térmico HSP72/sangue
Temperatura Alta/efeitos adversos
Interleucina-10/sangue
Interleucina-6/sangue
Corrida/fisiologia
[Mh] Termos MeSH secundário: Adulto
Regulação da Temperatura Corporal
Seres Humanos
Interleucina-1/sangue
Masculino
Fator de Necrose Tumoral alfa/sangue
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (HSP72 Heat-Shock Proteins); 0 (Interleukin-1); 0 (Interleukin-6); 0 (Tumor Necrosis Factor-alpha); 130068-27-8 (Interleukin-10)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180302
[Lr] Data última revisão:
180302
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170406
[St] Status:MEDLINE
[do] DOI:10.1080/02640414.2017.1313441


  8 / 16529 MEDLINE  
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[PMID]:29340527
[Au] Autor:Ribeiro LP; Freitas-Lima LC; Naumann GB; Meyrelles SS; Lunz W; Pires SF; Andrade HM; Carnielli JBT; Figueiredo SG
[Ad] Endereço:Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Vitória, ES, Brasil.
[Ti] Título:Cardiac protein expression patterns are associated with distinct inborn exercise capacity in non-selectively bred rats.
[So] Source:Braz J Med Biol Res;51(3):e7033, 2018 Jan 11.
[Is] ISSN:1414-431X
[Cp] País de publicação:Brazil
[La] Idioma:eng
[Ab] Resumo:In the present study, we successfully demonstrated for the first time the existence of cardiac proteomic differences between non-selectively bred rats with distinct intrinsic exercise capacities. A proteomic approach based on two-dimensional gel electrophoresis coupled to mass spectrometry was used to study the left ventricle (LV) tissue proteome of rats with distinct intrinsic exercise capacity. Low running performance (LRP) and high running performance (HRP) rats were categorized by a treadmill exercise test, according to distance run to exhaustion. The running capacity of HRPs was 3.5-fold greater than LRPs. Protein profiling revealed 29 differences between HRP and LRP rats (15 proteins were identified). We detected alterations in components involved in metabolism, antioxidant and stress response, microfibrillar and cytoskeletal proteins. Contractile proteins were upregulated in the LVs of HRP rats (α-myosin heavy chain-6, myosin light chain-1 and creatine kinase), whereas the LVs of LRP rats exhibited upregulation in proteins associated with stress response (aldehyde dehydrogenase 2, α-crystallin B chain and HSPß-2). In addition, the cytoskeletal proteins desmin and α-actin were upregulated in LRPs. Taken together, our results suggest that the increased contractile protein levels in HRP rats partly accounted for their improved exercise capacity, and that proteins considered risk factors to the development of cardiovascular disease were expressed in higher amounts in LRP animals.
[Mh] Termos MeSH primário: Testes de Função Cardíaca/métodos
Miocárdio/metabolismo
Condicionamento Físico Animal/fisiologia
Proteínas/metabolismo
Corrida/fisiologia
[Mh] Termos MeSH secundário: Animais
Proteínas Contráteis/metabolismo
Proteínas do Citoesqueleto/metabolismo
Desmina/metabolismo
Eletroforese em Gel Bidimensional
Ventrículos do Coração/metabolismo
Proteínas de Choque Térmico/metabolismo
Masculino
Espectrometria de Massas
Tamanho do Órgão
Proteínas/isolamento & purificação
Proteômica
Ratos
Ratos Endogâmicos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Contractile Proteins); 0 (Cytoskeletal Proteins); 0 (Desmin); 0 (Heat-Shock Proteins); 0 (Proteins)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180301
[Lr] Data última revisão:
180301
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180118
[St] Status:MEDLINE


  9 / 16529 MEDLINE  
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[PMID]:29179845
[Au] Autor:Gougeon B
[Ad] Endereço:Centre de documentation AP-HP, Campus Picpus, 33 boulevard de Picpus, 75012, Paris, France. Electronic address: brigitte.gougeon@aphp.fr.
[Ti] Título:[Wellbeing, team spirit and a fun run for women].
[Ti] Título:Bien-être, esprit d'équipe et course à pied au féminin..
[So] Source:Rev Infirm;66(236):32-33, 2017 Dec.
[Is] ISSN:1293-8505
[Cp] País de publicação:France
[La] Idioma:fre
[Ab] Resumo:The fun run La Parisienne, has been bringing together in Paris every September for the last 21 years, thousands of women running alongside each other to say no to breast cancer. Many caregivers also take part, in teams or with friends, like at the Odysséa fun run in which families can also participate. Charity sports events for the benefit of research which promote femininity, team spirit, sharing and wellbeing.
[Mh] Termos MeSH primário: Aniversários e Eventos Especiais
Instituições de Caridade
Corrida
[Mh] Termos MeSH secundário: Neoplasias da Mama
Feminino
Seres Humanos
Apoio à Pesquisa como Assunto
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180301
[Lr] Data última revisão:
180301
[Sb] Subgrupo de revista:N
[Da] Data de entrada para processamento:171129
[St] Status:MEDLINE


  10 / 16529 MEDLINE  
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[PMID]:29461218
[Au] Autor:Barrack MT; Fredericson M; Tenforde AS; Nattiv A
[Ad] Endereço:California State University, Long Beach, Long Beach, California, USA.
[Ti] Título:Evidence of a cumulative effect for risk factors predicting low bone mass among male adolescent athletes.
[So] Source:Br J Sports Med;51(3):200-205, 2017 Feb.
[Is] ISSN:1473-0480
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Limited research has evaluated risk factors for low bone mineral density (BMD) in male adolescent athletes. AIMS/OBJECTIVES: To evaluate predictors of low BMD (defined as BMD Z-score <-1.0) in a sample of male adolescent distance runner and non-runner athletes. METHODS: Male adolescent athletes completed a survey characterising sports participation, nutrition, stress fracture history, dual energy X-ray absorptiometry (DXA)-measured BMD and body composition. Independent t-tests and analysis of covariance (ANCOVA) evaluated group differences; logistic regression evaluated low BMD risk factors. RESULTS: Runners (n=51) exhibited a lower body weight (p=0.02), body mass index (BMI) (kg/m ) (p=0.02), per cent expected weight (p=0.02) and spine BMD Z-score (p=0.002) compared with non-runners (n=18). Single risk factors of low BMD included <85% expected weight (OR=5.6, 95% CI 1.4 to 22.5) and average weekly mileage >30 in the past year (OR=6.4, 95% CI 1.5 to 27.1). The strongest two-variable and three-variable risk factors included weekly mileage >30+ stress fracture history (OR=17.3, 95% CI 1.6 to 185.6) and weekly mileage >30+<85% expected weight + stress fracture history (OR=17.3, 95% CI 1.6 to 185.6), respectively. Risk factors were cumulative when predicting low BMD (including <85% expected weight, weekly mileage >30, stress fracture history and <1 serving of calcium-rich food/day): 0-1 risk factors (11.1%), 2 risk factors (42.9%), or 3-4 risk factors (80.0%), p<0.001). CONCLUSIONS: Male adolescent runners exhibited lower body weight, BMI and spine BMD Z-score values. The risk of low BMD displayed a graded relationship with increasing risk factors, highlighting the importance of using methods to optimise bone mass in this population.
[Mh] Termos MeSH primário: Atletas
Índice de Massa Corporal
Densidade Óssea
Corrida
[Mh] Termos MeSH secundário: Absorciometria de Fóton
Adolescente
Composição Corporal
Peso Corporal
Estudos Transversais
Fraturas de Estresse
Seres Humanos
Masculino
Estado Nutricional
Fatores de Risco
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180227
[Lr] Data última revisão:
180227
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180221
[St] Status:MEDLINE
[do] DOI:10.1136/bjsports-2016-096698



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