Effect of low dose, short-term creatine supplementation on muscle power output in elite youth soccer players

Yáñez-Silva, Aquiles; Buzzachera, Cosme Franklim; Piçarro, Ivan da Cruz; Januário, Renata Selvatici Borges; Ferreira, Luiz Danilo Damasceno; McAnulty, Steven R.; Utter, Alan C.; Souza, Tácito Pessoa de

doi:10.1186/s12970-017-0162-2

Cited by 39 publications

(64 citation statements)

References 41 publications

(74 reference statements)

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“…The elevated levels of muscle creatine were sustained in both cases with a maintenance dose of 2 g/day (30). Therefore, our results corroborate other findings (14,20,21,(31)(32)(33)(34)(35), i.e., low doses of creatine monohydrate supplementation, regardless of the use of saturation phase, could significantly increase maximum muscle strength and resistance to fatigue. Furthermore, no subjects in any of the groups reported any discomfort or side effects during the study period.…”

Section: Discussionsupporting

confidence: 82%

Effects of Low-Dose Creatine Monohydrate on Muscle Strength and Endurance

et al. 2018

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To investigate the effect of low-dose supplementation of creatine monohydrate without the use of the saturation phase, 36 male university students engaged in resistance training (age 22.5 ± 4.3 years, height 1.76 ± 0.08 m, weight 77.0 ± 11.0 kg, and body mass index 24.6 ± 2.5 kg/m 2 ) were randomly divided into three groups: group placebo (GP), group supplemented with creatine 3 g/day (3G), and group supplemented with 5 g/day creatine (5G). The subjects were tested for maximum muscle strength (1RM), upper body muscle endurance (MPU), and abdominal muscle endurance (MSU) before and after 7, 14, 21, 28, and 35 days of creatine supplementation or placebo and performing standardized resistance training. After 35 days of supplementation and training, all groups showed a significant improvement in the 1RM test; however, the percentages of strength increase were significantly higher (P < 0.05) in the groups supplemented with creatine (G3, ∆% 1RM = 20.0 ± 4.0; G5, ∆% 1RM = 19.9 ± 1.5) than in the placebo group (GP, ∆% 1RM = 10.3 ± 1.9). Upper limb muscle endurance showed a significant improvement only in 5G, ranging from 39.9 ± 7.9 MPU/min to 50.7 ± 11.0 MPU/min after 35 days of supplementation. Interestingly, abdominal muscle endurance showed no increase in any of the groups (GP, P > 0.528; G3, P > 0.076; G5, P > 0.148). These results support a number of earlier studies that demonstrated that creatine supplementation at low doses and without the use of the loading phase are effective for increasing maximal strength and endurance of upper limbs.

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Section: Discussionsupporting

confidence: 82%

Effects of Low-Dose Creatine Monohydrate on Muscle Strength and Endurance

et al. 2018

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“…Creatine is an amino acid derivative synthesized by arginine, glycine and methionine synthesis, and can supplement energy quickly and accelerate fatigue recovery in the human body. Creatinine is a nonenzymatic breakdown product of creatine and phosphocreatine, and the creatine–phosphocreatine system is crucial for cellular energy transport action (Yáñezsilva et al, ). As a result of our study, the concentrations of carnitine, betaine, creatine and creatinine in plasma of PD rats were significantly restored after GFC intervention supporting the hypothesis that GFC might regulate lipid metabolism and energy metabolism in PD rats.…”

Section: Discussionmentioning

confidence: 99%

Intergrated metabonomic study of the effects of Guizhi Fuling capsule intervention on primary dysmenorrheal using RP‐UPLC–MS complementary with HILIC‐UPLC–MS technique

Lang

Meng

Sun

et al. 2017

Biomedical Chromatography

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Guizhi Fuling capsule (GFC), developed from the traditional Chinese prescription of Guizhi Fuling Wan, has been commonly used for the treatment of primary dysmenorrhea (PD). However, the intervention effective mechanism in vivo has not been well elucidated. In this study, an integrated plasma metabonomic strategy based on RP-UPLC-MS coupled with HILIC-UPLC-MS technique has been developed to investigate the global therapeutic effects and intervention mechanisms of GFC on dysmenorrhea rats induced by oxytocin. The 20 potential biomarkers were identified and primarily related to sphingolipid metabolism, steroid hormone biosynthesis, glycerophospholipid metabolism, amino acid metabolism, lipid metabolism and energy metabolism. The results showed that the GFC has therapeutic effects on rats with dysmenorrhea via the regulation of multiple metabolic pathways. Some new potential biomarkers associated with primary dysmenorrhea such as phenylalanine, tryptophan, taurine, carnitine, betaine, creatine and creatinine have been discovered in this study for the first time. This study provides a metabonomic platform based on RP-UPLC-MS complementary to HILIC-UPLC-MS technique to investigate both nonpolar and polar compounds, so as to get a more comprehensive metabolite information to yield insight into the pathophysiology of PD and assessing the efficacy of GFC on PD rats.

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“…Moreover, it has been used as a golden standard to validate field tests in this sport ( Thomas et al, 2002 ; Hazir et al, 2018 ) and it correlated with match performance ( Pekas et al, 2016 ). It has been used to monitor the effectiveness of training, e.g., a 2 months preparation training program ( Vasileios et al, 2018 ), 6 weeks training ( Kazem et al, 2016 ) or 8 weeks training ( Polczyk and Zatoń, 2015 ), and nutrition intervention in soccer players ( Yáñez-Silva et al, 2017 ). Despite the documented popularity of the WAnT in soccer, surprisingly no comprehensive sport-specific normative data have been ever published.…”

Section: Introductionmentioning

confidence: 99%

Normative Data of the Wingate Anaerobic Test in 1 Year Age Groups of Male Soccer Players

Nikolaidis¹,

Matos

Clemente

et al. 2018

Front. Physiol.

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The Wingate anaerobic test (WAnT) has been used extensively to evaluate performance in soccer, however, a comprehensive sport-specific normative database has not been available so far. Therefore, the main aim of the present study was to develop norms of the main indices of the WAnT with regards to age in soccer. A secondary aim was to examine the relationship of WAnT with two common field tests, 20 m sprint and vertical jump, and study the variation of this relationship by age and playing position. Hundred and ninety five male soccer players (age 18.1 ± 4.9 years) performed the WAnT, and a sub-sample of 190 soccer players (age 19.4 ± 5.1 years) performed 20 m sprint, squat (SJ) and countermovement jump (CMJ). Age was related very largely with peak power (R2 = 0.57) and mean power of the WAnT (R2 = 0.60) when they were expressed in W, and largely (R2 = 0.41 and R2 = 0.33, respectively) when they were expressed in W.kg−1, whereas it did not relate with fatigue index. After being adjusted for age, a relationship of SJ (B = 3.91, 90% CI: 2.49, 5.32; R2 = 0.26), CMJ (B = 3.59, 90% CI: 2.22, 4.95; R2 = 0.24) and 20 m sprint (B = −0.06, 90% CI: −0.10; −0.01; R2 = 0.19) with peak power of the WanT was observed. In summary, Ppeak and Pmean were related very largely to age, especially during adolescence, and percentile norms of these indices were developed for 1-year age groups from 11 to 21 years old and for a single adult age group (22–39 years old). These findings on the largest dataset of soccer players ever studied would be expected to offer a practical tool to the members of the sports medicine team (e.g., exercise physiologists, fitness trainers, and coaches) working with them.

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Effect of low dose, short-term creatine supplementation on muscle power output in elite youth soccer players

Cited by 39 publications

References 41 publications

Effects of Low-Dose Creatine Monohydrate on Muscle Strength and Endurance

Effects of Low-Dose Creatine Monohydrate on Muscle Strength and Endurance

Intergrated metabonomic study of the effects of Guizhi Fuling capsule intervention on primary dysmenorrheal using RP‐UPLC–MS complementary with HILIC‐UPLC–MS technique

Normative Data of the Wingate Anaerobic Test in 1 Year Age Groups of Male Soccer Players

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