Creatine Supplementation

Treatment consisted of four doses of 5g of cr 1g of

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Unformatted text preview: es of 5g of Cr + 1g of glucose for the Cr group and four doses of 6g glucose for placebo condition. Testing consisted of five sets of 30 maximal volitional contractions with a 1-minute rest period between sets. Peak torque measurements were taken during each of the 30 contractions, with the average value being used in the analyses. Peak torque declined from sets one to four, with no difference seen between sets four and five. A three-way ANOVA determined that there were no significant group, time or interaction effects, suggesting that acute Cr supplementation did not significantly affect indices of isokinetic torque production at a constant velocity of 180 degrees/ second.[37] Isokinetic studies with Cr supplementation in older populations have produced differing results from younger or athletic populations. Rawson and Clarkson[3] randomly assigned 17 men between the ages of 60 and 78 years to either a Cr group (5g + 1g sucrose four times daily for 5 days) or a placebo group (6g sucrose four times daily for 5 days). Prior to testing and following 5 days of Cr loading, subjects performed an intermittent isokinetic fatigue 2005 Adis Data Information BV. All rights reserved. 115 test of the knee extensors, which involved three sets of 30 maximal volitional actions at 180 degrees/ second interspaced with 60 seconds of recovery. Each group was analysed separately with a two-way ANOVA. There was no significant interaction term for isokinetic performance for either group indicating that Cr did not exhibit a performance-enhancing effect for older men perhaps due to poorer Cr absorption, transportation or uptake by the muscle.[3] Chrusch et al.[29] examined the effects of combined Cr ingestion and resistance training (36 total training sessions) on isokinetic muscle performance in older men. Thirty subjects were randomly assigned to either a Cr group (n = 6; mean age 70.4 ± 1.6 years) or a placebo group (n = 14; mean age 71.1 ± 1.8 years). The Cr loading phase consisted of 0.3 g/kg BW for the first 5 days,...
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This note was uploaded on 01/28/2014 for the course BI 231 taught by Professor Richardmay during the Fall '13 term at Southern Oregon.

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