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Related Experiment Videos

Creatine loading, resistance exercise performance, and muscle mechanics.

S W Stevenson1, G A Dudley

  • 1Department of Kinesiology and Health Promotion, California State Polytechnic University, Pomona, CA 91768, USA.

Journal of Strength and Conditioning Research
|December 1, 2001
PubMed
Summary

Creatine monohydrate loading did not significantly improve resistance exercise performance or muscle strength in trained individuals. The study found no performance benefits compared to placebo supplementation.

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Area of Science:

  • Sports Science
  • Nutritional Supplementation
  • Human Physiology

Background:

  • Creatine monohydrate is a popular supplement for enhancing athletic performance.
  • Previous research has yielded mixed results regarding its efficacy in resistance-trained individuals.

Purpose of the Study:

  • To investigate the effects of creatine monohydrate loading on resistance exercise performance, isometric strength, and muscle contractile properties.
  • To compare creatine loading against a placebo in resistance-trained subjects.

Main Methods:

  • Double-blind, placebo-controlled study design.
  • Participants underwent a 7-day creatine or placebo loading phase (20 g/day).
  • Assessed 1 repetition maximum (1RM), 5-set performance, isometric torque, rate of torque development, and electromyostimulation-induced torque.

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Main Results:

  • A slight, non-significant increase in 1RM (2%) and 5-set performance (5%) was observed in the overall group.
  • No significant differences in strength or contractile properties were found between the creatine and placebo groups.
  • Isometric strength, rate of torque development, and electromyostimulation responses remained unchanged.

Conclusions:

  • Creatine monohydrate loading does not appear to augment unilateral knee extension strength or multiset resistance exercise performance in resistance-trained individuals.
  • The observed minor performance improvements were not statistically different from placebo effects.
  • Further research may be needed to explore specific training protocols or populations where creatine may offer benefits.