The effects of cr.pyruvate and cr.citrate on performance during high int. exercise

**3XL** · 6 March 2008, 17:44

The effects of creatine pyruvate and creatine citrate on performance during high intensity exercise
Ralf Jager , Jan Metzger , Karin Lautmann , Vladimir Shushakov , Martin Purpura , Kurt-Reiner Geiss and Norbert Maassen

Journal of the International Society of Sports Nutrition 2008, 5:4doi:10.1186/1550-2783-5-4

Published: 13 February 2008

Abstract (provisional)

Background
A double-blind, placebo-controlled, randomized study was performed to evaluate the effect of oral creatine pyruvate (Cr-Pyr) and creatine citrate (Cr-Cit) supplementation on exercise performance in healthy young athletes.

Methods
Performance during intermittent handgrip exercise of maximal intensity was evaluated before (pretest) and after (posttest) 28 days of Cr-Pyr (5 g/d, n = 16), Cr-Cit (5 g/d, n = 16) or placebo (pla, 5 g/d, n = 17) intake. Subjects performed ten 15-sec exercise intervals, each followed by 45 sec rest periods.

Results
Cr-Pyr (p<0.001) and Cr-Cit (p<0.01) significantly increased mean power over all intervals. Cr-Cit increased force during the first and second interval (p<0.01) compared to placebo. The effect of Cr-Cit on force decreased over time and the improvement was not significant at the sixth and ninth interval, whereas Cr-Pyr significantly increased force during all intervals (p<0.001). Cr-Pyr (p<0.001) and Cr-Cit (p<0.01) resulted in an increase in contraction velocity, whereas only Cr-Pyr intake significantly (p<0.01) increased relaxation velocity. Oxygen consumption measured during rest periods significantly increased with Cr-Pyr (p<0.05), whereas Cr-Cit and placebo intake did not result in significant improvements.

Conclusion
It is concluded that four weeks of Cr-Pyr and Cr-Cit intake significantly improves performance during intermittent handgrip exercise of maximal intensity and that Cr-Pyr might benefit endurance, due to enhanced activity of the aerobic metabolism.

http://www.jissn.com/content/pdf/1550-2783-5-4.pdf

solo · 8 March 2008, 05:07

Humm bedankt,
ik raak wel een beetje de weg kwijt met de creatine soorten
Je hebt:
creatine-monohydraat
creatine ester (CCE )

en in dit artikel gaat het over:
creatine citrate
en creatine pyruvate
Ik zie een beetje door de bomen het bos niet meer (of zijn citrate en pyruate hulpstoffen)

6 March 2008, 17:44	#1
3XL Super Moderator Geregistreerd: Apr 2002 Locatie: افغانستان Geslacht: V Posts: 10.504 Karma Power: 26	The effects of cr.pyruvate and cr.citrate on performance during high int. exercise The effects of creatine pyruvate and creatine citrate on performance during high intensity exercise Ralf Jager , Jan Metzger , Karin Lautmann , Vladimir Shushakov , Martin Purpura , Kurt-Reiner Geiss and Norbert Maassen Journal of the International Society of Sports Nutrition 2008, 5:4doi:10.1186/1550-2783-5-4 Published: 13 February 2008 Abstract (provisional) Background A double-blind, placebo-controlled, randomized study was performed to evaluate the effect of oral creatine pyruvate (Cr-Pyr) and creatine citrate (Cr-Cit) supplementation on exercise performance in healthy young athletes. Methods Performance during intermittent handgrip exercise of maximal intensity was evaluated before (pretest) and after (posttest) 28 days of Cr-Pyr (5 g/d, n = 16), Cr-Cit (5 g/d, n = 16) or placebo (pla, 5 g/d, n = 17) intake. Subjects performed ten 15-sec exercise intervals, each followed by 45 sec rest periods. Results Cr-Pyr (p<0.001) and Cr-Cit (p<0.01) significantly increased mean power over all intervals. Cr-Cit increased force during the first and second interval (p<0.01) compared to placebo. The effect of Cr-Cit on force decreased over time and the improvement was not significant at the sixth and ninth interval, whereas Cr-Pyr significantly increased force during all intervals (p<0.001). Cr-Pyr (p<0.001) and Cr-Cit (p<0.01) resulted in an increase in contraction velocity, whereas only Cr-Pyr intake significantly (p<0.01) increased relaxation velocity. Oxygen consumption measured during rest periods significantly increased with Cr-Pyr (p<0.05), whereas Cr-Cit and placebo intake did not result in significant improvements. Conclusion It is concluded that four weeks of Cr-Pyr and Cr-Cit intake significantly improves performance during intermittent handgrip exercise of maximal intensity and that Cr-Pyr might benefit endurance, due to enhanced activity of the aerobic metabolism. http://www.jissn.com/content/pdf/1550-2783-5-4.pdf __________________ As you are now, I once was. As I am now, you'll never be ©3XL ®2000 The only easy day was yesterday...............Life is hard, so am I Doing more exercise with less intensity has all but destroyed the actual great value of weight training. Something must be done . . . and quickly." (," Arthur Jones) Geloof niets, probeer alles

8 March 2008, 05:07	#2
solo Cool Novice Geregistreerd: Jul 2003 Locatie: NL Geslacht: M Posts: 146 Karma Power: 5	Humm bedankt, ik raak wel een beetje de weg kwijt met de creatine soorten Je hebt: creatine-monohydraat creatine ester (CCE ) en in dit artikel gaat het over: creatine citrate en creatine pyruvate Ik zie een beetje door de bomen het bos niet meer (of zijn citrate en pyruate hulpstoffen) Laatst aangepast door solo : 8 March 2008 om 05:14.

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