Abstract:
INTRODUCTION:Taekwondo (TKD) is a combat sport, which has also been proposed as a fitness program, with a strong anaerobic component. Creatine (Cr) supplementation is used to improve both anaerobic exercise performance and body composition. Therefore, Cr supplementation could be beneficial in TKD. AIMS:To determine the effect of Cr supplementation (50 mg/kg body wt) on body composition, anaerobic power and blood chemistry in young male TKD practitioners. METHODS:Ten male TKD practitioners (age [20 ± 2 yr], height [1.69 ± 0.06 m], and mass [67 ± 9.8 kg]) participated in a placebo-controlled, double blind, crossover study. Body composition (DEXA), anaerobic power (Wingate Test), blood lactate and blood chemistry were measured before and after supplementation. Differences between data before and after supplementation were calculated for each treatment (Cr and Placebo) and were compared using the Wilcoxon signed-rank test. RESULTS:Fat mass (kg) decreased after placebo (Mdn [IqR] = -0.75 [-1.44 to 0.03]) and increased following Cr intake (0.17 [-0.77 to 1.13] kg) (Z = 2.191, p < 0.028, r = 0.49). Serum triglyceride concentration (mg/mL) increased after Cr (45.00 [-7.50 to 75.00]) and decrease with placebo (-7.00 [-10.75 to 12.00]) (Z = 2.090, p < 0.037, r = 0.47). No changes were found in others parameters. CONCLUSION:Cr supplementation may increase fat mass and serum triglycerides concentration in young male TKD practitioners without improvement in anaerobic power. Cr supplementation appears to be safe, but athletes should be careful when they want to loss fat. :Introducción: El Taekwondo (TKD) es un arte marcial, que ha sido propuesto también en programas de actividad física, con un fuerte componente anaeróbico. La suplementación con creatina (Cr), utilizada para mejorar el rendimiento deportivo y la composición corporal, puede ser beneficiosa en TKD. Objetivos: Determinar el efecto de la suplementación de Cr sobre la composición corporal, potencia anaeróbica y bioquímica sanguínea en practicantes jóvenes de TKD. Métodos: Diez practicantes varones de TKD (edad [20 ± 2 AÑOs], estatura [1,69 ± 0,06 m], peso [67,0 ± 9,8 kg]) participaron en un ensayo aleatorizado cruzado (grupo control + placebo). Se evaluaron (pre-post suplementación) la composición corporal (DEXA), la potencia anaeróbica (Test de Wingate), el lactato y la bioquímica sanguínea. Se calculó la diferencia entre los valores pre y post ingestión para ambos tratamientos (Cr y placebo) y se compararon las diferencias usando la prueba de signos y rangos de Wilcoxon. Resultados: La masa grasa (kg) disminuyó después del placebo (Mdn [IqR] = -0,75 [-1,44 a 0,03]) mientras que con Cr se elevó significativamente (0,17 [-0,77 a 1,13] kg) (Z = 2,191, p < 0,028, r = 0,49). La concentración sanguínea de triglicéridos (mg/mL) aumentó con Cr (45,00 [- 7,50 a 75,00]) y disminuyó con Placebo (-7,00 [-10,75 a 12,00]) (Z = 2,090, p < 0,037, r = 0,47). No hubo cambios significativos en otros parámetros. Conclusiones: La suplementación con creatina puede incrementar la masa grasa y la concentración sanguínea de triglicéridos en jóvenes practicantes de TKD, sin mejorar la potencia anaerobia. La suplementación parece ser segura, pero es necesario ser cuidadosos cuando se busca disminuir el peso corporal.
journal_name
Nutr Hospjournal_title
Nutricion hospitalariaauthors
Manjarrez-Montes de Oca R,Farfán-González F,Camarillo-Romero S,Tlatempa-Sotelo P,Francisco-Argüelles C,Kormanowski A,González-Gallego J,Alvear-Ordenes Idoi
10.3305/nh.2013.28.2.6314subject
Has Abstractpub_date
2013-03-01 00:00:00pages
391-9issue
2eissn
0212-1611issn
1699-5198journal_volume
28pub_type
杂志文章,随机对照试验abstract:BACKGROUND:There is scarce information about constipation in elderly subjects. Among the variety of factors causing constipation, the sleeping hours are a factor usually not taken into account. OBJECTIVES:To determine the association between hours of sleep during the week and weekend, with constipation in older adults...
journal_title:Nutricion hospitalaria
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journal_title:Nutricion hospitalaria
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doi:
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abstract::A prospective study was carried out in 207 patients with benign and neoplastic diseases of the digestive tract who were candidates for elective surgery, in order to evaluate the influence of the nutritional status and perioperative transfusions on the appearance of postoperative infections. All patients were subjected...
journal_title:Nutricion hospitalaria
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更新日期:1998-09-01 00:00:00
abstract::Objective: To estimate the prevalence of chronic obstructive pulmonary disease (COPD) phenotypes in the province of Leon. Methods: Multicenter epidemiological cross-sectional study (30 health centers in the province of Leon). It included patients older than 35 years diagnosed and treated for COPD. Study variables: ag...
journal_title:Nutricion hospitalaria
pub_type: 杂志文章,多中心研究
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abstract:BACKGROUND:Breast cancer is the most common cancer in women worldwide. Differences in breast cancer incidence suggest a significant role of environmental factors in the aetiology: obesity, central adiposity, excess body fat and some dietary factors have been suggested as risk factors. This pilot study aimed to analyse ...
journal_title:Nutricion hospitalaria
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abstract:BACKGROUND:Active commuting to school is associated to higher levels of physical activity among children. Family factors may influence on this behaviour. OBJECTIVE:The objective was to analyze the association between parents' occupational activity and parents' mode of commuting to work with the mode of commuting of th...
journal_title:Nutricion hospitalaria
pub_type: 杂志文章
doi:10.3305/nh.2013.28.3.6399
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journal_title:Nutricion hospitalaria
pub_type: 杂志文章
doi:10.20960/nh.03203
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journal_title:Nutricion hospitalaria
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pub_type: 临床试验,杂志文章
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journal_title:Nutricion hospitalaria
pub_type: 杂志文章,评审
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journal_title:Nutricion hospitalaria
pub_type: 杂志文章
doi:10.3305/nh.2013.28.2.6320
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更新日期:2002-01-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章,评审
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