Creatine Supplementation

Lifting cadence was controlled by a metronome set at

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Unformatted text preview: ed by a metronome set at a frequency of 19Hz and measures of mean power and average velocity were recorded by a rotary encoder. A significant group by time interaction indicated a significantly greater improvement in repetitions performed to fatigue, total average power during the power endurance test, and 1RM half squat for the Cr group. Additionally, there was less of a decline in the power/velocity from CMVJ 1 to CMVJ 2 for the Cr group and a decrease in average running times over the first 5m during repetitive sprints. Similar improvements in sprint performance were reported by Skare et al.[42] Eighteen male track sprinters, with at least 3 years of experience in regional competition were randomly assigned to either a Cr group (n = 9; 20g Cr + 20g glucose/day) or a placebo group (n = 9; 40g glucose/day). There were significant increases in 100m sprint performance and repeated sprint performance for the Cr group, while the placebo group had no improvement from pre- to post-conditions. One problem with the data analyses is that it was unclear if a group by time interaction was evaluated or if only paired t-tests were used to evaluate the data. Improved sprint performance was also demonstrated by Cox et al.[41] using elite soccer players. Twelve subjects with a mean age of 22.1 years were given a standard diet that provided 7g carbohydrate/ kg BW for a 24-hour period before each test session. Each of the two test sessions were separated by 7 2005 Adis Data Information BV. All rights reserved. 117 days and included 11 all-out 20m sprints, two agility runs and one ball-kicking drill, each separated by 20m walks, jogs or runs during a 1-hour time period. After the first test session, the subjects were randomised into a treatment (5g Cr four times daily for 6 days) or a placebo group in a double-blind fashion and were then re-tested on the original test items. Body mass was increased significantly more for the Cr group yet they had better repeated sprint times and better agility runs with lower heart rates and lower lactate levels than the placebo group.[41] Sprint performance was also...
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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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