Effects of a Supplement on Muscle Performance
Author Information
Author(s): Trent J Herda, Eric D Ryan, Jeffrey R Stout, Joel T Cramer
Primary Institution: Department of Health and Exercise Science, University of Oklahoma, Norman, USA
Hypothesis
Does a nutritional supplement designed to increase ATP levels improve muscle strength, power output, and endurance?
Conclusion
The study found no improvements in muscle strength, power output, or endurance from the nutritional supplement.
Supporting Evidence
- The supplement did not improve vertical jump height.
- There were no differences in isometric strength of the leg extensors.
- Leg extension endurance tests showed no significant changes.
- Repetitions to exhaustion during forearm flexion tests were similar for both trials.
Takeaway
The supplement didn't help people jump higher or lift more weights, even though it was supposed to.
Methodology
Twenty-four healthy men participated in a double-blinded, placebo-controlled, crossover study with two experimental trials.
Limitations
The study did not extract tissue or blood samples to measure ATP levels directly.
Participant Demographics
Healthy men, mean age 23 years, with no reported neuromuscular diseases.
Statistical Information
Statistical Significance
p > 0.05
Digital Object Identifier (DOI)
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