PubMed 26. Irving BA, Patrie JT, Anderson SM, Watson-Winfield DD, Frick KI, Evans WS, Veldhuis JD, Weltman A: The effects SB202190 of time following acute growth hormone administration on metabolic and power output measures during acute exercise. J Clin Endocrinol Metab 2004,89(9):4298–4305.PubMedCrossRef Competing buy Go6983 interests This study project was funded by University of Jyväskylä, Department of Biology of Physical Activity. The authors declare that they have no competing interests. Authors’ contributions
EH (corresponding author) was responsible for the study design, the execution of the measurements, the statistical analysis and the preparation of the manuscript. RP participated in the study design and carried out all the blood sampling and analysis. HK helped in interpretation of data and revised the manuscript. AM supervised the study design, the implementation of the measurements and the drafting and revising the manuscript. All authors read and this website approved the final manuscript.”
“Background It has been well-established
that creatine monohydrate (CrM) increases whole body creatine retention and muscle creatine content. Extracts of Russian Tarragon (RT) have been reported to produce anti-hyperglycemic effects  and influence plasma creatine levels during the ingestion of CrM . Theoretically, RT ingestion with CrM may promote greater creatine retention than ingesting CrM alone. The purpose of this preliminary study was to determine if short-term, low-dose aqueous RT extract ingestion prior to CrM supplementation influences whole body creatine retention or muscle creatine content. Methods In a double-blind, randomized, and crossover manner; 10 3-oxoacyl-(acyl-carrier-protein) reductase untrained males (20±2 yrs; 179±9 cm; 91.3±34 kg) ingested 500 mg of aqueous Tarragon extract
(Finzelberg, Andernach, Germany) or 500 mg of a placebo (P) 30-minutes prior to ingesting 5 g of CrM (Creapure ® , AlzChem AG, Germany) (CrM+RT). Subjects ingested the supplements two times per day (morning and evening) for 5-days and then repeated the experiment after a 6-week wash-out period. Urine was collected at baseline and during each of the 5-days of supplementation to determine urine creatine content. Whole body creatine retention was estimated as the difference from orally ingested CrM (10 g/d) from the amount of creatine excreted daily in urine. Muscle biopsies were also obtained from the vastus lateralis at baseline and after 3 and 5 days of supplementation for determination of muscle free creatine content. Data were analysed by MANOVA with repeated measures. Results Daily urinary excretion of creatine increased in both groups from baseline (0.4±0.5; 1.9±1.4, 3.5±2.4, 4.4±3.2, 3.9±2.6, 5.2±3.1 g/d; p=0.001) with no differences observed between groups (CrM+P 0.34±0.4, 1.9±1.6, 3.5±2.3, 4.7±3.3, 3.2±2.8, 5.0±3.4; CrM+RT 0.5±0.6, 1.7±1.1, 3.4±2.7, 4.2±3.3, 4.6±2.2, 5.4±3/2 g/d; p=0.59). Whole body daily creatine retention increased following supplementation (0.0±0.0; 8.2±1.4, 6.5±2.4, 5.6±3.2, 6.1±2.6, 4.8±3.